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date wp-embed-responsive customizer-styles-applied group-blog hfeed jetpack-reblog-enabled"> <div id="page" class="site"> <div class="site-inner"> <a class="skip-link screen-reader-text" href="#content"> Skip to content </a> <header id="masthead" class="site-header"> <div class="site-header-main"> <div class="site-branding"> <a href="https://blog.metabrainz.org/" class="site-logo-link" rel="home" itemprop="url"></a> <p class="site-title"><a href="https://blog.metabrainz.org/" rel="home">MetaBrainz Blog</a></p> <p class="site-description">MetaBrainz Foundation community blog</p> </div> <button id="menu-toggle" class="menu-toggle">Menu</button> <div id="site-header-menu" class="site-header-menu"> <nav id="site-navigation" class="main-navigation" aria-label="Primary Menu"> </nav> </div> </div> <div class="header-image"> <a href="https://blog.metabrainz.org/" rel="home"> <img src="https://blog.metabrainz.org/wp-content/uploads/2018/11/cropped-twitter-banner-1500x500.jpg" srcset="" sizes="" width="1200" height="186" alt="MetaBrainz Blog"> </a> </div> </header> <div id="content" class="site-content"> <div id="primary" class="content-area"> <main id="main" class="site-main"> <header class="page-header"> <h1 class="page-title">Month: <span>August 2017</span></h1> </header> <article id="post-6423" class="post-6423 post type-post status-publish format-standard hentry category-picard category-summer-of-code tag-google-summer-of-code tag-picard"> <header class="entry-header"> <h2 class="entry-title"><a href="https://blog.metabrainz.org/2017/08/31/500-commits-of-summer-my-story-of-foss-and-gsoc/" rel="bookmark">500 Commits of Summer: My story of FOSS and GSoC</a></h2> </header> <div class="entry-content"> <p>This story of summer started in a dull grey winter at home. Bored, I started lingering around <a href="https://www.irccloud.com/irc/freenode">IRC</a> channels and much like the Alice of Wonderland, stumbled into the wonderful world of <a href="https://en.wikipedia.org/wiki/Free_and_open-source_software">FOSS</a>. Little did I know, it was gonna be one of the best things that happened to me. Below is a story of bugs, PRs , repos, commits, and some more commits. But it is also a story of curiosity, learning, frustrations (a lot of it), resilience (more than you think) and some amazing amazing people of the community. If I have to sum it up for you, I couldn’t think of a way better than this. So here it goes…</p> <p>Disclaimer: It was a long journey, hence the long blog. <a href="https://blog.metabrainz.org/2017/08/31/500-commits-of-summer-my-story-of-foss-and-gsoc/#more-6423" class="more-link">Continue reading<span class="screen-reader-text"> “500 Commits of Summer: My story of FOSS and GSoC”</span></a></p> </div> <footer class="entry-footer"> <span class="byline"><span class="author vcard"><span class="screen-reader-text">Author </span> <a class="url fn n" href="https://blog.metabrainz.org/author/samj1912/">Sambhav Kothari</a></span></span><span class="posted-on"><span class="screen-reader-text">Posted on </span><a href="https://blog.metabrainz.org/2017/08/31/500-commits-of-summer-my-story-of-foss-and-gsoc/" rel="bookmark"><time class="entry-date published" datetime="2017-08-31T12:00:36+00:00">August 31, 2017</time><time class="updated" datetime="2017-09-04T19:20:00+00:00">September 4, 2017</time></a></span><span class="cat-links"><span class="screen-reader-text">Categories </span><a href="https://blog.metabrainz.org/category/musicbrainz/picard/" rel="category tag">Picard</a>, <a href="https://blog.metabrainz.org/category/google-programs/summer-of-code/" rel="category tag">Summer of Code</a></span><span class="tags-links"><span class="screen-reader-text">Tags </span><a href="https://blog.metabrainz.org/tag/google-summer-of-code/" rel="tag">Google Summer of Code</a>, <a href="https://blog.metabrainz.org/tag/picard/" rel="tag">Picard</a></span><span class="comments-link"><a href="https://blog.metabrainz.org/2017/08/31/500-commits-of-summer-my-story-of-foss-and-gsoc/#comments">3 Comments<span class="screen-reader-text"> on 500 Commits of Summer: My story of FOSS and GSoC</span></a></span> </footer> </article> <article id="post-6428" class="post-6428 post type-post status-publish format-standard hentry category-critiquebrainz category-summer-of-code tag-critiquebrainz tag-google-summer-of-code"> <header class="entry-header"> <h2 class="entry-title"><a href="https://blog.metabrainz.org/2017/08/30/gsoc-2017-rating-system-in-critiquebrainz/" rel="bookmark">GSoC 2017: Rating System in CritiqueBrainz</a></h2> </header> <div class="entry-content"> <p>Hello!</p> <p>I am Pinank Solanki, an undergrad at Indian Institute of Technology (IIT) Mandi, India. I worked with the MetaBrainz Foundation on one of its projects, as part of the Google Summer of Code 2017 over the last summer. It was one of the best and exciting summers I ever had.</p> <p>Let me begin from the beginning. I first came to know about MusicBrainz in January and first contacted the community in February and was immediately hooked. Initially I decided to make a proposal for addition of <a href="https://wiki.musicbrainz.org/Development/Summer_of_Code/2017/CritiqueBrainz">book reviews</a> for CritiqueBrianz, but it was not possible because the BookBrainz web service was unstable and the CritiqueBrainz’s host didn’t have direct access to BookBrainz database. So I tried to pitch my own ideas. But then, in one of the <a href="https://musicbrainz.org/doc/MetaBrainz_Meeting">weekly meetings</a>, I saw great support and enthusiasm among the community members for <a href="https://tickets.metabrainz.org/browse/CB-244">rating system for reviews</a> —and I personally liked the idea of the project and thought it would be a great addition to CritiqueBrainz. I submitted <a href="https://community.metabrainz.org/t/gsoc-2017-add-rating-system-in-critiquebrainz/239782">my proposal</a>, got accepted and a treat to the friends was due!</p> <h3>Overview</h3> <p>The aim of the project was to add support for three types of reviews: text, rating, text+rating (CB supported only-text reviews).</p> <p>The schema changes and data-access functions are completed and merged. The frontend part is mainly completed including the fundamental functionality along with additional features. It took a lot of time to select and modify the rating input plugin perfectly satisfying the project’s needs. There is still some work to be done, most of which is based on the rating scale conversion in db package. Similarly, most of the web service part is completed and is held up due to the rating scale conversion PR.</p> <h3>Implementation</h3> <h4>Schema changes</h4> <p>The schema changes done are quite different than what was mentioned in the proposal. My mentor for the project, Roman Tsukanov (Gentlecat), recommended some changes which would make keeping track of revisions a lot easier. You can see the schema <a href="https://github.com/ps2611/critiquebrainz/blob/4b9cfff962204f8871227564ef19d329a87104bb/docs/images/schema.svg">here</a> and the PR <a href="https://github.com/metabrainz/critiquebrainz/pull/109">here</a>.</p> <h4>Data-access functions</h4> <p>By the time I started working on the project, CB has migrated off the ORM. So, I wrote raw SQL queries and its tests. See the PR <a href="https://github.com/metabrainz/critiquebrainz/pull/125">here</a>. The rating scale was decided to be 1-5 but for storage a scale of 0-100 is used just like <a href="https://musicbrainz.org/">MusicBrainz</a> keeping the possibility of migration of ratings from MB to CB in mind (more info at <a href="https://tickets.metabrainz.org/browse/CB-245">CB-245</a>). This part is covered in the PR <a href="https://github.com/metabrainz/critiquebrainz/pull/152">here</a>.</p> <h4>Changes in user-interface</h4> <p><a href="https://github.com/javiertoledo/bootstrap-rating-input">This plugin</a> is used for rendering the rating star icons. The code can be seen in this <a href="https://github.com/metabrainz/critiquebrainz/pull/138">PR.</a> See the images below to get a good idea about the implementation.</p> <p>Write review page:</p> <p><img data-attachment-id="6480" data-permalink="https://blog.metabrainz.org/2017/08/30/gsoc-2017-rating-system-in-critiquebrainz/cb-write-review/" data-orig-file="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-write-review.png" data-orig-size="1176,599" data-comments-opened="1" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}" data-image-title="cb-write-review" data-image-description="" data-image-caption="" data-medium-file="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-write-review.png?w=300" data-large-file="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-write-review.png?w=1176" class="alignnone size-full wp-image-6480" src="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-write-review.png?w=840" alt="cb-write-review" srcset="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-write-review.png 1176w, https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-write-review.png?w=128&h=65 128w, https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-write-review.png?w=300&h=153 300w, https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-write-review.png?w=768&h=391 768w, https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-write-review.png?w=1024&h=522 1024w" sizes="(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px" /></p> <p>Review page:</p> <p><img data-attachment-id="6498" data-permalink="https://blog.metabrainz.org/2017/08/30/gsoc-2017-rating-system-in-critiquebrainz/cb-review/" data-orig-file="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-review.png" data-orig-size="1173,600" data-comments-opened="1" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}" data-image-title="cb-review" data-image-description="" data-image-caption="" data-medium-file="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-review.png?w=300" data-large-file="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-review.png?w=1173" class="alignnone size-full wp-image-6498" src="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-review.png?w=840" alt="cb-review" srcset="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-review.png 1173w, https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-review.png?w=128&h=65 128w, https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-review.png?w=300&h=153 300w, https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-review.png?w=768&h=393 768w, https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-review.png?w=1024&h=524 1024w" sizes="(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px" /></p> <p>Entity page:</p> <p><img data-attachment-id="6506" data-permalink="https://blog.metabrainz.org/2017/08/30/gsoc-2017-rating-system-in-critiquebrainz/cb-entity-page/" data-orig-file="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-entity-page.png" data-orig-size="1169,566" data-comments-opened="1" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}" data-image-title="cb-entity-page" data-image-description="" data-image-caption="" data-medium-file="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-entity-page.png?w=300" data-large-file="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-entity-page.png?w=1169" class="alignnone size-full wp-image-6506" src="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-entity-page.png?w=840" alt="cb-entity-page" srcset="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-entity-page.png 1169w, https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-entity-page.png?w=128&h=62 128w, https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-entity-page.png?w=300&h=145 300w, https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-entity-page.png?w=768&h=372 768w, https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-entity-page.png?w=1024&h=496 1024w" sizes="(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px" /></p> <p>Revision comparison:</p> <p><img data-attachment-id="6511" data-permalink="https://blog.metabrainz.org/2017/08/30/gsoc-2017-rating-system-in-critiquebrainz/cb-revision-comparison/" data-orig-file="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-revision-comparison.png" data-orig-size="1176,420" data-comments-opened="1" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}" data-image-title="cb-revision-comparison" data-image-description="" data-image-caption="" data-medium-file="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-revision-comparison.png?w=300" data-large-file="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-revision-comparison.png?w=1176" loading="lazy" class="alignnone size-full wp-image-6511" src="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-revision-comparison.png?w=840" alt="cb-revision-comparison" srcset="https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-revision-comparison.png 1176w, https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-revision-comparison.png?w=128&h=46 128w, https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-revision-comparison.png?w=300&h=107 300w, https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-revision-comparison.png?w=768&h=274 768w, https://blog.metabrainz.org/wp-content/uploads/2017/08/cb-revision-comparison.png?w=1024&h=366 1024w" sizes="(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 1362px) 62vw, 840px" /></p> <h4>Web service</h4> <p>All the functionalities added to CritiqueBrainz had to be implemented in the web service (API) as well. All three types of reviews and other features are now supported via the web service. See the PR <a href="https://github.com/metabrainz/critiquebrainz/pull/154">here</a>.</p> <h4>Documentation</h4> <p>The chief part of the documentation was to update the schema. Other than that, rating parameter and several notes were added to the API documentation. See the PR <a href="https://github.com/metabrainz/critiquebrainz/pull/150">here</a>.</p> <p>Other PRs relevant to the project can be found <a href="https://github.com/metabrainz/critiquebrainz/pulls?utf8=%E2%9C%93&q=is%3Apr%20author%3Aps2611%20">here</a>.</p> <h3>Future work</h3> <p>First of all, I will complete the leftover work. Web service and frontend PRs are dependent on the rating scale PR. Once it gets merged, it’s 2–3 days of work to complete the rest.</p> <p>Other than that, I look forward to keep contributing to CritiqueBrainz and other MetaBrainz projects. I am sure many interesting ideas will be discussed at the annual MetaBrainz Summit in Barcelona.</p> <h3>Conclusion</h3> <p>It was quite an eventful summer and GSoC was the biggest of them. Thanks to Roman for his constant help and guidance over the entire summer and also to all the other community members. It was so cool to work on an open-source project and I would definitely suggest for any music and data lover to explore the MetaBrainz projects.</p> </div> <footer class="entry-footer"> <span class="byline"><span class="author vcard"><span class="screen-reader-text">Author </span> <a class="url fn n" href="https://blog.metabrainz.org/author/psolanki10/">psolanki</a></span></span><span class="posted-on"><span class="screen-reader-text">Posted on </span><a href="https://blog.metabrainz.org/2017/08/30/gsoc-2017-rating-system-in-critiquebrainz/" rel="bookmark"><time class="entry-date published" datetime="2017-08-30T19:09:36+00:00">August 30, 2017</time><time class="updated" datetime="2017-08-30T19:10:43+00:00">August 30, 2017</time></a></span><span class="cat-links"><span class="screen-reader-text">Categories </span><a href="https://blog.metabrainz.org/category/critiquebrainz/" rel="category tag">CritiqueBrainz</a>, <a href="https://blog.metabrainz.org/category/google-programs/summer-of-code/" rel="category tag">Summer of Code</a></span><span class="tags-links"><span class="screen-reader-text">Tags </span><a href="https://blog.metabrainz.org/tag/critiquebrainz/" rel="tag">CritiqueBrainz</a>, <a href="https://blog.metabrainz.org/tag/google-summer-of-code/" rel="tag">Google Summer of Code</a></span><span class="comments-link"><a href="https://blog.metabrainz.org/2017/08/30/gsoc-2017-rating-system-in-critiquebrainz/#respond">Leave a comment<span class="screen-reader-text"> on GSoC 2017: Rating System in CritiqueBrainz</span></a></span> </footer> </article> <article id="post-6546" class="post-6546 post type-post status-publish format-standard hentry category-listenbrainz category-summer-of-code tag-google-summer-of-code tag-listenbrainz"> <header class="entry-header"> <h2 class="entry-title"><a href="https://blog.metabrainz.org/2017/08/29/gsoc-2017-hacking-on-listenbrainz/" rel="bookmark">GSoC 2017: Hacking on ListenBrainz</a></h2> </header> <div class="entry-content"> <p>Namaste!</p> <p>I am Param Singh, an undergraduate at the National Institute of Technology, Hamirpur, India, and I worked on ListenBrainz over the summer as part of the Google Summer of Code program. I started contributing code to ListenBrainz in January 2017 and have been working on new features and bug fixes since. I’ll be writing about the work I did and my experience working on LB in this blog post.</p> <p>After a few of my patches had made it in and I was comfortable with the ListenBrainz codebase (which was a really nice example of software architecture for me), I talked with the LB team about what possible contributions I could make over the summer, and we decided that a Google BigQuery based statistics system is something that would be useful to have in ListenBrainz after we release a beta and have listen data that is permanently archived. I made a <a href="https://community.metabrainz.org/t/gsoc-2017-adding-statistics-and-graphs-to-listenbrainz/227733">proposal</a> for adding statistics to ListenBrainz which got accepted! During the community bonding period, we decided to try to get a solid and stable beta of ListenBrainz released before starting with the relatively large code additions that would be required by my project proposal. We tracked issues that we wanted fixed before a release in the MetaBrainz ticket tracker <a href="https://tickets.metabrainz.org/projects/LB/versions/10621">here</a>. This work of fixing release blocking issues went into the coding period and we decided to continue working on a solid beta instead of adding new features for the time being. </p> <p>I started with fixing bugs and adding new features to get a beta released as soon as possible. Some cool stuff I worked on during this time was dockerizing MessyBrainz (see PR <a href="https://github.com/metabrainz/messybrainz-server/pull/18">here</a>), migrating the codebases of MessyBrainz and ListenBrainz to Python 3 (PRs <a href="https://github.com/metabrainz/listenbrainz-server/pull/187">here</a> and <a href="https://github.com/metabrainz/messybrainz-server/pull/20">here</a>) and improving the startup resilience of various parts of ListenBrainz to make sure that the server is able to self-heal (partially) if some part of it like RabbitMQ goes down (ticket <a href="https://tickets.metabrainz.org/browse/LB-155">here</a>). </p> <p>Later on, I did a big refactor of the LB code so that adding new modules would be easier in the future (PR <a href="https://github.com/metabrainz/listenbrainz-server/pull/179">here</a>). I also spent a lot of time fixing bugs in our listen deduplication. Relevant pull requests for this are <a href="https://github.com/metabrainz/listenbrainz-server/pull/212">here</a> and <a href="https://github.com/metabrainz/listenbrainz-server/pull/223">here</a>.</p> <p>Another feature I added to ListenBrainz while working on the beta was incremental imports. Earlier, LB didn’t keep track of previous imports of a user and did a full Last.FM import every time. However, now we keep track of the last time each user imported listens and only import new data since then. The PR adding incremental imports is <a href="https://github.com/metabrainz/listenbrainz-server/pull/207">here</a>.</p> <p>My mentor, Robert Kaye (ruaok) set up a test instance of the ListenBrainz server that was used by the community and as the community kept throwing their data at us, bugs kept popping up. A particularly weird bug caused LB to lose data for users with special characters in their usernames. The <a href="https://github.com/metabrainz/listenbrainz-server/pull/199">PR</a> to fix this took a lot of time to create. </p> <p>We kept on fixing bugs for a long time and the biggest thing I took away from this period of GSoC was the <a href="https://en.wikipedia.org/wiki/Ninety-ninety_rule">Ninety-ninety rule</a>: «The first 90 percent of the code accounts for the first 90 percent of the development time. The remaining 10 percent of the code accounts for the other 90 percent of the development time.» This summer has drilled this into my mind.</p> <p>As soon as the beta was released, I started with writing code for statistics, making schema changes (PR <a href="https://github.com/metabrainz/listenbrainz-server/pull/192">here</a>) and adding some user stats (PRs <a href="https://github.com/metabrainz/listenbrainz-server/pull/202">here</a> and <a href="https://github.com/metabrainz/listenbrainz-server/pull/244">here</a>). I’ll be continuing on the stats work after Summer of Code. The basic foundation of stats is mostly done and soon I’ll start with showing statistics to the users.</p> <p>By the end of the official GSoC coding period, I have made 266 commits in the ListenBrainz <a href="https://github.com/metabrainz/listenbrainz-server/graphs/contributors">codebase</a> and have opened a total of <a href="https://github.com/metabrainz/listenbrainz-server/pulls?utf8=%E2%9C%93&q=author%3Aparamsingh">111 pull requests</a>. The current production ListenBrainz running on <a href="https://listenbrainz.org">https://listenbrainz.org</a> has 253 commits by me, most of which were made during the GSoC period. </p> <p>Over the summer, I have fallen in love with the MetaBrainz community and have learned a lot of stuff. I’m really looking forward to adding more features to ListenBrainz soon, so that the data that the community is contributing becomes useful to everyone. I loved working on a really cool open-source project like ListenBrainz this summer and am very thankful to Google for providing me this opportunity. I would encourage everyone reading this to give the ListenBrainz beta a try and contribute to ListenBrainz if possible.</p> </div> <footer class="entry-footer"> <span class="byline"><span class="author vcard"><span class="screen-reader-text">Author </span> <a class="url fn n" href="https://blog.metabrainz.org/author/paramsingh258/">iliekcomputers</a></span></span><span class="posted-on"><span class="screen-reader-text">Posted on </span><a href="https://blog.metabrainz.org/2017/08/29/gsoc-2017-hacking-on-listenbrainz/" rel="bookmark"><time class="entry-date published" datetime="2017-08-29T15:56:14+00:00">August 29, 2017</time><time class="updated" datetime="2017-08-29T15:57:11+00:00">August 29, 2017</time></a></span><span class="cat-links"><span class="screen-reader-text">Categories </span><a href="https://blog.metabrainz.org/category/listenbrainz/" rel="category tag">ListenBrainz</a>, <a href="https://blog.metabrainz.org/category/google-programs/summer-of-code/" rel="category tag">Summer of Code</a></span><span class="tags-links"><span class="screen-reader-text">Tags </span><a href="https://blog.metabrainz.org/tag/google-summer-of-code/" rel="tag">Google Summer of Code</a>, <a href="https://blog.metabrainz.org/tag/listenbrainz/" rel="tag">ListenBrainz</a></span><span class="comments-link"><a href="https://blog.metabrainz.org/2017/08/29/gsoc-2017-hacking-on-listenbrainz/#comments">1 Comment<span class="screen-reader-text"> on GSoC 2017: Hacking on ListenBrainz</span></a></span> </footer> </article> <article id="post-6425" class="post-6425 post type-post status-publish format-standard hentry category-critiquebrainz category-summer-of-code tag-critiquebrainz tag-google-summer-of-code"> <header class="entry-header"> <h2 class="entry-title"><a href="https://blog.metabrainz.org/2017/08/28/gsoc-2017-directly-accessing-musicbrainz-db-in-critiquebrainz/" rel="bookmark">GSoC 2017: Directly accessing MusicBrainz DB in CritiqueBrainz</a></h2> </header> <div class="entry-content"> <p>Hello, everyone! This summer was fantastic for me!<br /> I’m Suyash Garg, an undergraduate at National Institute of Technology, Hamirpur and I participated in Google Summer of Code 2017 contributing code to <a href="https://critiquebrainz.org/">CritiqueBrainz</a>. Alastair Porter mentored me during this GSoC programme. This post summarizes my contributions to the project and experiences that I had throughout the summer.</p> <p>I started contributing to CritiqueBrainz in January, 2017 and before the start of the SoC programme, I mainly worked on writing raw SQL for retrieving data from the CB database and replacing the ORM code (<a href="https://tickets.metabrainz.org/projects/CB/issues/CB-230">CB-230</a>). Other than that I worked on issues like <a href="https://tickets.metabrainz.org/projects/CB/issues/CB-120">CB-120</a>, <a href="https://tickets.metabrainz.org/projects/CB/issues/CB-235">CB-235</a> and other minor bugs and issues. They were my first proper contributions to the open source world. Thank you MetaBrainz!!</p> <p>For the Google Summer of Code 2017, my project involved retrieving data related to various entities (release-groups, artists, releases, events and places) directly from the MusicBrainz database instead of querying the MusicBrainz web service (<a href="https://tickets.metabrainz.org/projects/CB/issues/CB-231">CB-231</a>). This became necessary as some pages on CB required to fetch too much data and thus made many requests to the MB web service. These pages were taking a long time to load. Thus, by connecting directly to the database, we could reduce the load time of these pages.</p> <p>Here is a summary of my contributions to the project during the summer:</p> <dl> <dt><em style="text-decoration:underline;">Accessing the MusicBrainz database</em></dt> <dd>New Infrastructure is allowing us to easily read data directly from the MusicBrainz database. For accessing the database in the development environment, another service running the MusicBrainz database was added which uses an existing Docker image which the MusicBrainz project was already using. This allowed us to share resources between projects. I worked on adding an option to download the database dumps and import the data into the database (see <a href="https://github.com/metabrainz/musicbrainz-server/pull/523">PR#523</a>). Also, I added the service in CB docker-compose files and updated the <a href="http://critiquebrainz.readthedocs.io/intro.html#setting-up-the-server">documentation for setting up the development environment</a> (see <a href="https://github.com/metabrainz/critiquebrainz/pull/115">PR#115</a> and <a href="https://github.com/metabrainz/critiquebrainz/pull/92">PR#92</a>).</dd> <dt><em style="text-decoration:underline;">Fetching data using <code>mbdata.models</code></em></dt> <dd>After setting up the development environment, my mentor suggested to me to use the <a href="https://bitbucket.org/lalinsky/mbdata"><code>mbdata</code></a> package for writing queries to fetch data from the database instead of writing raw SQL. I worked on retrieving information for the entity: <a href="https://github.com/metabrainz/critiquebrainz/pull/110">places</a> and added helpers for fetching the relationship information. Following that, I worked on retrieving information for other entities (<a href="https://github.com/metabrainz/critiquebrainz/pull/122">release-groups</a>, <a href="https://github.com/metabrainz/critiquebrainz/pull/137">releases</a>, <a href="https://github.com/metabrainz/critiquebrainz/pull/148">events</a>, and <a href="https://github.com/metabrainz/critiquebrainz/pull/140">artists</a>). Also, since SQLAlchemy makes lazy queries to the database, a number of queries were being issued to the database. This could slow things down as for each query it was going to require one trip to the SQL server (network trip in production). So, as suggested by my mentor, I also worked on reducing the number of queries made for fetching data related to each entity (see <a href="https://github.com/metabrainz/critiquebrainz/pull/140">PR#135</a>). For pages that made a number of requests to the web service, I made this <a href="https://github.com/metabrainz/critiquebrainz/pull/121">PR#121</a> for fetching information related to multiple entities at the same time.</dd> <dt><em style="text-decoration:underline;">Testing</em></dt> <dd>For testing, the database queries are mocked using the <a href="https://docs.python.org/3/library/unittest.mock.html#module-unittest.mock"><code>unittest.mock</code></a> Python package. The tests added make sure that the code (serializing RowProxy objects to dictionaries, caching, etc.) works properly (see <a href="https://github.com/metabrainz/critiquebrainz/pull/134">PR#134</a>). Adding up a new service (as a separate Docker container) in the test environment and running tests was taking too much time (in creating the tables and truncating them). So as suggested by my mentors, mocking the database queries was the best option. Throughout my GSoC period, I learned how important it was to write tests (especially when you break things more when you fix something) and make them run fast. I learned that «If tests don’t run fast, they would be a distraction rather than a help» (quoting from the book “The Art of Agile Development” by James Shore).</dd> </dl> <p>Other than these, I also worked on some UI/UX issues, namely <a href="https://tickets.metabrainz.org/projects/CB/issues/CB-80">CB-80</a> (adding option to filter releases with reviews), <a href="https://tickets.metabrainz.org/projects/CB/issues/CB-84">CB-84</a> (ordering release groups according to release year) and <a href="https://tickets.metabrainz.org/projects/CB/issues/CB-261">CB-261</a> (authenticating requests to Spotify Web API). <a href="https://tickets.metabrainz.org/projects/CB/issues/CB-130">CB-130</a> (reviewing entities with MBID redirects – see <a href="https://github.com/metabrainz/critiquebrainz/pull/145">PR#145</a>) was also solved while solving a <a href="https://sentry.metabrainz.org/share/issue/342e32363535/">production server issue</a>.</p> <p>This summer was awesome for me. I learned a lot of new things and techniques for writing better code. Thanks to my mentors, Alastair Porter and Roman Tsukanov. Also, great thanks to the lovely MetaBrainz community and Google for this opportunity. I’m really looking forward to keep contributing to CritiqueBrainz and to dive into other MetaBrainz projects.</p> </div> <footer class="entry-footer"> <span class="byline"><span class="author vcard"><span class="screen-reader-text">Author </span> <a class="url fn n" href="https://blog.metabrainz.org/author/suyashgarg/">Suyash Garg</a></span></span><span class="posted-on"><span class="screen-reader-text">Posted on </span><a href="https://blog.metabrainz.org/2017/08/28/gsoc-2017-directly-accessing-musicbrainz-db-in-critiquebrainz/" rel="bookmark"><time class="entry-date published updated" datetime="2017-08-28T16:36:33+00:00">August 28, 2017</time></a></span><span class="cat-links"><span class="screen-reader-text">Categories </span><a href="https://blog.metabrainz.org/category/critiquebrainz/" rel="category tag">CritiqueBrainz</a>, <a href="https://blog.metabrainz.org/category/google-programs/summer-of-code/" rel="category tag">Summer of Code</a></span><span class="tags-links"><span class="screen-reader-text">Tags </span><a href="https://blog.metabrainz.org/tag/critiquebrainz/" rel="tag">CritiqueBrainz</a>, <a href="https://blog.metabrainz.org/tag/google-summer-of-code/" rel="tag">Google Summer of Code</a></span><span class="comments-link"><a href="https://blog.metabrainz.org/2017/08/28/gsoc-2017-directly-accessing-musicbrainz-db-in-critiquebrainz/#comments">3 Comments<span class="screen-reader-text"> on GSoC 2017: Directly accessing MusicBrainz DB in CritiqueBrainz</span></a></span> </footer> </article> <article id="post-6419" class="post-6419 post type-post status-publish format-standard hentry category-musicbrainz category-schema-change-release tag-musicbrainz tag-schema-change"> <header class="entry-header"> <h2 class="entry-title"><a href="https://blog.metabrainz.org/2017/08/15/no-autumn-2017-schema-change-release/" rel="bookmark">No autumn 2017 schema change release</a></h2> </header> <div class="entry-content"> <p>Once again, we’re opting to not have a schema change release in the Autumn of 2017. Expect our next schema change release to be on or about 15 May, 2018.</p> </div> <footer class="entry-footer"> <span class="byline"><span class="author vcard"><span class="screen-reader-text">Author </span> <a class="url fn n" href="https://blog.metabrainz.org/author/ruaok/">ruaok</a></span></span><span class="posted-on"><span class="screen-reader-text">Posted on </span><a href="https://blog.metabrainz.org/2017/08/15/no-autumn-2017-schema-change-release/" rel="bookmark"><time class="entry-date published updated" datetime="2017-08-15T13:41:49+00:00">August 15, 2017</time></a></span><span class="cat-links"><span class="screen-reader-text">Categories </span><a href="https://blog.metabrainz.org/category/musicbrainz/" rel="category tag">MusicBrainz</a>, <a href="https://blog.metabrainz.org/category/development/updates/breaking-changes/schema-change-release/" rel="category tag">Schema Change Release</a></span><span class="tags-links"><span class="screen-reader-text">Tags </span><a href="https://blog.metabrainz.org/tag/musicbrainz/" rel="tag">MusicBrainz</a>, <a href="https://blog.metabrainz.org/tag/schema-change/" rel="tag">schema change</a></span><span class="comments-link"><a href="https://blog.metabrainz.org/2017/08/15/no-autumn-2017-schema-change-release/#respond">Leave a comment<span class="screen-reader-text"> on No autumn 2017 schema change release</span></a></span> </footer> </article> <article id="post-6413" class="post-6413 post type-post status-publish format-standard hentry category-cleanup-of-the-month category-musicbrainz"> <header class="entry-header"> <h2 class="entry-title"><a href="https://blog.metabrainz.org/2017/08/06/classical-community-cleanup-1-debussy/" rel="bookmark">Classical Community Cleanup #1: Debussy</a></h2> </header> <div class="entry-content"> <p><span style="font-weight:400;">The Metabrainz Classical Music Enthusiasts Team has kicked off to a strong start! If you are unaware about the formation and tasks at hand, you can <a href="https://community.metabrainz.org/c/musicbrainz/classical">read more about it on the forums</a>.</span></p> <p><span style="font-weight:400;">It’s clear by the number of discussions and engagements in the forum that a community effort on classical music was long overdue! It’s thrilling and we are eager for the first mission: after some <a href="https://community.metabrainz.org/t/possible-community-cleanup-targets/293033">discussion</a></span><span style="font-weight:400;"> and <a href="https://community.metabrainz.org/t/vote-community-cleanup-for-august/300695">voting</a> </span><span style="font-weight:400;">we decided that the first community effort would be <a href="https://community.metabrainz.org/t/community-cleanup-1-debussy/315984">a clean-up of all our data for Claude Debussy</a></span><span style="font-weight:400;">. </span></p> <p><span style="font-weight:400;">As a composer with a huge influence in 20th century music, yet with a relatively low amount of hard to edit compositions like operas, <a href="https://musicbrainz.org/artist/be50643c-0377-4968-b48c-47e06b2e2a3b">Debussy</a></span><span style="font-weight:400;"> is a great first choice for the community of classical editors to start actively working together to improve the data. As such, if you’d like to help out, but are new to classical editing or not too active in the community yet, don’t hesitate to reach out and ask any questions. The classical community is active in <a href="https://community.metabrainz.org/c/musicbrainz/classical">its own forum category</a></span><span style="font-weight:400;">, and we’re hoping to see a lot of activity there with editors both asking and answering questions. </span></p> <p><span style="font-weight:400;">What will we be working on in this first classical cleanup project? </span></p> <ul> <li><span style="font-weight:400;">We will review the existing works and catalogues to make sure there are no duplicates and the info looks correct (several very active classical editors have already been working on this in preparation for this cleanup).</span></li> <li><span style="font-weight:400;">We will check the release list for anything that doesn’t follow the classical guidelines. Those should of course be fixed to follow the guidelines, and that’s usually a good sign of the recording and relationship info being incomplete as well.</span></li> <li><span style="font-weight:400;">We will work on the recording list. The only recordings that should be there by the end of the cleanup are of Debussy himself as a performer. Anything else currently there should have performer relationships added to it if missing, then the artist credits for the recording should be changed to list the main performers.</span></li> <li><span style="font-weight:400;">And we will add missing Debussy recordings! If you have enough info to add a release we’re missing that includes works by Debussy, that’s always useful. Just make sure to try to add as much info as possible from the get go, so we don’t have to clean that addition up as well!</span></li> </ul> <p><span style="font-weight:400;">Don’t know where to begin? Let us know and we can help find a starting point–or just jump in and help out! We can’t wait for Mr. Debussy to be a great example of how much information MusicBrainz can provide!</span></p> </div> <footer class="entry-footer"> <span class="byline"><span class="author vcard"><span class="screen-reader-text">Author </span> <a class="url fn n" href="https://blog.metabrainz.org/author/reosarevok/">reosarevok</a></span></span><span class="posted-on"><span class="screen-reader-text">Posted on </span><a href="https://blog.metabrainz.org/2017/08/06/classical-community-cleanup-1-debussy/" rel="bookmark"><time class="entry-date published" datetime="2017-08-06T12:00:06+00:00">August 6, 2017</time><time class="updated" datetime="2017-08-05T13:32:56+00:00">August 5, 2017</time></a></span><span class="cat-links"><span class="screen-reader-text">Categories </span><a href="https://blog.metabrainz.org/category/community/cleanup-of-the-month/" rel="category tag">Cleanup of the Month</a>, <a href="https://blog.metabrainz.org/category/musicbrainz/" rel="category tag">MusicBrainz</a></span><span class="comments-link"><a href="https://blog.metabrainz.org/2017/08/06/classical-community-cleanup-1-debussy/#respond">Leave a comment<span class="screen-reader-text"> on Classical Community Cleanup #1: Debussy</span></a></span> </footer> </article> <article id="post-6364" class="post-6364 post type-post status-publish format-standard hentry category-listenbrainz tag-bigdata tag-bigquery tag-google tag-listenbrainz"> <header class="entry-header"> <h2 class="entry-title"><a href="https://blog.metabrainz.org/2017/08/05/listenbrainz-data-is-live-on-bigquery/" rel="bookmark">ListenBrainz data is live on BigQuery!</a></h2> </header> <div class="entry-content"> <p>We’re pleased to announce that in cooperation with Google, we are live streaming our <a href="https://listenbrainz.org">ListenBrainz</a> data to <a href="https://cloud.google.com/bigquery/">Google’s BigQuery service</a>!</p> <p>ListenBrainz is a project is that has the potential to gather a lot of data quickly, which would require us to have a Big Data infrastructure, which can be expensive. In an effort to use our available cash wisely, we began to look around for ways to take advantage of other infrastructures with lower costs.</p> <p>Two years ago at the Google Summer of Code mentor summit I met with a representative from the BigQuery team who said that Google was happy to host any public data set for free! I immediately took them up on this offer and started a conversation. With much time passed, we finally managed to get the data set live!</p> <p>If you wish to play with the data, please do!</p> <p style="padding-left:30px;"><a href="https://bigquery.cloud.google.com/table/listenbrainz:listenbrainz.listen"><em>https://bigquery.cloud.google.com/table/listenbrainz:listenbrainz.listen</em></a></p> <p>You’ll need a Google account to log in with — once you’re logged in, every user gets 5TB of query traffic free per month. That is quite a lot for how large this dataset is currently. The <a href="https://github.com/metabrainz/listenbrainz-server/blob/master/admin/bigquery/listen-schema.json">schema for this table</a> is defined here and what the data elements mean are defined in our <a href="http://listenbrainz.readthedocs.io/en/production/dev/json.html">API docs</a>. To get you started, I’ve written a few sample queries:</p> <ul> <li><a href="https://bigquery.cloud.google.com/savedquery/186965179676:d92533c348924618a9c39e74dbb85a63">The last 25 listens for all users</a></li> <li><a href="https://bigquery.cloud.google.com/results/resonant-cairn-175115:bquijob_4afb3311_15dacfbf2b6">The top 25 artists for user “rob”</a></li> <li><a href="https://bigquery.cloud.google.com/savedquery/186965179676:8b54ac5884ba46188093695ed84f7a71">Top tracks and artists for user “rob”</a></li> </ul> <p>BigQuery uses an SQL like syntax, so if you know some SQL then diving right in should be easy. The queries above should give you an idea of what you can do with this data. Now, please know that currently we have approaching 30M listens, so the dataset is still quite small. We’re very much interested to see what sort of things people can come up with in the near future.</p> <p>Finally, some notes about openness and proprietary software: Given that we have limited resources, we aim to make the most things happen with the services that are at our disposal. Google has been extremely generous to us over the years and we’re very pleased to have access to BigQuery now.</p> <p>That is not to say that we’re putting all of our eggs in one basket or forcing people to use BigQuery. Our InfluxDB database hosted on our own servers keeps the master archival copy of our listen data. Soon we hope to make dumps of this data available for anyone to download and play with using whatever tools they would like. With this setup we are not fully reliant on Google for keeping this project alive. We’re glad to have their support, but should circumstance change, we can find another BigData solution and load our master archival copy there.</p> <p>Now, go play with this very promising data and post some of your favorite queries in the comments!</p> <p> </p> <p> </p> </div> <footer class="entry-footer"> <span class="byline"><span class="author vcard"><span class="screen-reader-text">Author </span> <a class="url fn n" href="https://blog.metabrainz.org/author/ruaok/">ruaok</a></span></span><span class="posted-on"><span class="screen-reader-text">Posted on </span><a href="https://blog.metabrainz.org/2017/08/05/listenbrainz-data-is-live-on-bigquery/" rel="bookmark"><time class="entry-date published updated" datetime="2017-08-05T10:20:45+00:00">August 5, 2017</time></a></span><span class="cat-links"><span class="screen-reader-text">Categories </span><a href="https://blog.metabrainz.org/category/listenbrainz/" rel="category tag">ListenBrainz</a></span><span class="tags-links"><span class="screen-reader-text">Tags </span><a href="https://blog.metabrainz.org/tag/bigdata/" rel="tag">bigdata</a>, <a href="https://blog.metabrainz.org/tag/bigquery/" rel="tag">bigquery</a>, <a href="https://blog.metabrainz.org/tag/google/" rel="tag">google</a>, <a href="https://blog.metabrainz.org/tag/listenbrainz/" rel="tag">ListenBrainz</a></span><span class="comments-link"><a href="https://blog.metabrainz.org/2017/08/05/listenbrainz-data-is-live-on-bigquery/#respond">Leave a comment<span class="screen-reader-text"> on ListenBrainz data is live on BigQuery!</span></a></span> </footer> </article> </main> </div> <aside id="secondary" class="sidebar widget-area"> <section id="block-7" class="widget widget_block"><h2 class="widget-title">Links</h2><div class="wp-widget-group__inner-blocks"> <ul class="wp-block-list"> <li><a href="https://metabrainz.org/">MetaBrainz Foundation</a></li> <li><a href="https://community.metabrainz.org/">MetaBrainz Forums</a></li> <li><a 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width:32px;"></td><td class="recentcommentstextend" style="">roman412 on <a href="https://blog.metabrainz.org/2025/02/05/picard-2-13-1-released/#comment-366395">Picard 2.13.1 released</a></td></tr><tr><td title="yvanzo" class="recentcommentsavatarend" style="height:32px; width:32px;"></td><td class="recentcommentstextend" style="">yvanzo on <a href="https://blog.metabrainz.org/2025/01/29/musicbrainz-mirror-security-advisory-2025-01-29/#comment-366392">MusicBrainz mirror security ad…</a></td></tr> </table> </section><section id="categories-2" class="widget widget_categories"><h2 class="widget-title">Categories</h2><nav aria-label="Categories"> <ul> <li class="cat-item cat-item-304848241"><a href="https://blog.metabrainz.org/category/acousticbrainz/">AcousticBrainz</a> (17) </li> <li class="cat-item cat-item-12894481"><a href="https://blog.metabrainz.org/category/musicbrainz/android-app/">Android App</a> (9) </li> <li class="cat-item cat-item-494176"><a 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