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Customizable Email sender address with Devise - DEV Community
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template="web-share-button"> </web-share-wrapper> <template id="web-share-button"> <a href="#" class="dropdown-link-row crayons-link crayons-link--block">Share Post via...</a> </template> <a href="/report-abuse" class="crayons-link crayons-link--block">Report Abuse</a> </div> </div> </div> </div> </aside> <main id="main-content" class="crayons-layout__content grid gap-4"> <div class="article-wrapper"> <article class="crayons-card crayons-article mb-4" id="article-show-container" data-article-id="432632" data-article-slug="customizable-email-sender-address-with-devise-58a5" data-author-id="145919" data-author-name="David Paluy" data-author-username="dpaluy" data-co-author-ids="" data-path="/dpaluy/customizable-email-sender-address-with-devise-58a5" data-pin-path="/stories/feed/pinned_article" data-pinned-article-id="" data-published="true" data-scheduled="false" lang=en > <header class="crayons-article__header" id="main-title"> <div class="crayons-article__header__meta"> <div class="flex s:items-start flex-col s:flex-row"> <div id="action-space" class="crayons-article__actions mb-4 s:mb-0 s:order-last"></div> <div class="flex flex-1 mb-5 items-start"> <div class="relative"> <a href="/dpaluy"><img class="radius-full align-middle" src="https://media2.dev.to/dynamic/image/width=50,height=50,fit=cover,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F145919%2F547f5da7-55fe-44b2-a4ee-ebf2a85d9260.png" width="40" height="40" alt="David Paluy" /></a> </div> <div class="pl-3 flex-1"> <a href="/dpaluy" class="crayons-link fw-bold">David Paluy</a> <p class="fs-xs color-base-60"> Posted on <time datetime="2020-08-19T21:17:43Z" class="date">Aug 19, 2020</time> </p> </div> </div> </div> <div class="multiple_reactions_engagement"> <span class="reaction_engagement_like hidden"> <img src="https://assets.dev.to/assets/sparkle-heart-5f9bee3767e18deb1bb725290cb151c25234768a0e9a2bd39370c382d02920cf.svg" width="24" 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href="/t/email"><span class="crayons-tag__prefix">#</span>email</a> </div> </div> </header> <div class="crayons-article__main "> <div class="crayons-article__body text-styles spec__body" data-article-id="432632" id="article-body"> <p>When installing the devise gem in your Rails application, you will find the following:<br> </p> <div class="highlight js-code-highlight"> <pre class="highlight ruby"><code><span class="no">Devise</span><span class="p">.</span><span class="nf">setup</span> <span class="k">do</span> <span class="o">|</span><span class="n">config</span><span class="o">|</span> <span class="c1"># ...</span> <span class="n">config</span><span class="p">.</span><span class="nf">mailer_sender</span> <span class="o">=</span> <span class="s1">'please-change-me-at-config-initializers-devise@example.com'</span> <span class="c1"># ...</span> <span class="k">end</span> </code></pre> <div class="highlight__panel js-actions-panel"> <div class="highlight__panel-action js-fullscreen-code-action"> <svg xmlns="http://www.w3.org/2000/svg" width="20px" height="20px" viewbox="0 0 24 24" class="highlight-action crayons-icon highlight-action--fullscreen-on"><title>Enter fullscreen mode</title> <path d="M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z"></path> </svg> <svg xmlns="http://www.w3.org/2000/svg" width="20px" height="20px" viewbox="0 0 24 24" class="highlight-action crayons-icon highlight-action--fullscreen-off"><title>Exit fullscreen mode</title> <path d="M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z"></path> </svg> </div> </div> </div> <p>You can set static email, for example:<br> </p> <div class="highlight js-code-highlight"> <pre class="highlight ruby"><code><span class="no">Devise</span><span class="p">.</span><span class="nf">setup</span> <span class="k">do</span> <span class="o">|</span><span class="n">config</span><span class="o">|</span> <span class="c1"># ...</span> <span class="n">config</span><span class="p">.</span><span class="nf">mailer_sender</span> <span class="o">=</span> <span class="s1">'Acme Team <team@acme.com>'</span> <span class="c1"># ...</span> <span class="k">end</span> </code></pre> <div class="highlight__panel js-actions-panel"> <div class="highlight__panel-action js-fullscreen-code-action"> <svg xmlns="http://www.w3.org/2000/svg" width="20px" height="20px" viewbox="0 0 24 24" class="highlight-action crayons-icon highlight-action--fullscreen-on"><title>Enter fullscreen mode</title> <path d="M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z"></path> </svg> <svg xmlns="http://www.w3.org/2000/svg" width="20px" height="20px" viewbox="0 0 24 24" class="highlight-action crayons-icon highlight-action--fullscreen-off"><title>Exit fullscreen mode</title> <path d="M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z"></path> </svg> </div> </div> </div> <p>But if you need to allow your back-office team member periodically to customize this parameter, how would you do this?</p> <p>I recommend using <a href="https://github.com/huacnlee/rails-settings-cached">rails-settings</a> gem.<br> </p> <div class="highlight js-code-highlight"> <pre class="highlight ruby"><code><span class="k">class</span> <span class="nc">Setting</span> <span class="o"><</span> <span class="no">RailsSettings</span><span class="o">::</span><span class="no">Base</span> <span class="n">field</span> <span class="ss">:email_from</span><span class="p">,</span> <span class="ss">type: :string</span><span class="p">,</span> <span class="ss">default: </span><span class="s1">'Acme Team <team@acme.com>'</span> <span class="k">end</span> </code></pre> <div class="highlight__panel js-actions-panel"> <div class="highlight__panel-action js-fullscreen-code-action"> <svg xmlns="http://www.w3.org/2000/svg" width="20px" height="20px" viewbox="0 0 24 24" class="highlight-action crayons-icon highlight-action--fullscreen-on"><title>Enter fullscreen mode</title> <path d="M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z"></path> </svg> <svg xmlns="http://www.w3.org/2000/svg" width="20px" height="20px" viewbox="0 0 24 24" class="highlight-action crayons-icon highlight-action--fullscreen-off"><title>Exit fullscreen mode</title> <path d="M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z"></path> </svg> </div> </div> </div> <p>Now, if you try adding this <code>Setting.email_from</code> to <code>devise.rb</code> initializer, you will get an error: <code>You cannot use settings before Rails initialize. (RuntimeError)</code>.</p> <p>To solve this problem, do the following:<br> </p> <div class="highlight js-code-highlight"> <pre class="highlight ruby"><code><span class="no">Devise</span><span class="p">.</span><span class="nf">setup</span> <span class="k">do</span> <span class="o">|</span><span class="n">config</span><span class="o">|</span> <span class="c1"># ...</span> <span class="n">config</span><span class="p">.</span><span class="nf">mailer_sender</span> <span class="o">=</span> <span class="o">-></span><span class="p">(</span><span class="n">_devise_mapping</span><span class="p">)</span> <span class="p">{</span> <span class="no">SiteConfig</span><span class="p">.</span><span class="nf">email_from</span> <span class="p">}</span> <span class="c1"># ...</span> <span class="k">end</span> </code></pre> <div class="highlight__panel js-actions-panel"> <div class="highlight__panel-action js-fullscreen-code-action"> <svg xmlns="http://www.w3.org/2000/svg" width="20px" height="20px" 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