https://ruby-china.org/JSmile en-us <p>这几天想用 grape 做接口这部分时候，遇到个问题，在最新版的里，想用 ActiveRecord 管理数据库链接</p> <pre class="highlight ruby"><code><span class="n">use</span> <span class="no">ActiveRecord</span><span class="o">::</span><span class="no">ConnectionAdapters</span><span class="o">::</span><span class="no">ConnectionManagement</span> </code></pre> <p>结果发现：</p> <pre class="highlight ruby"><code><span class="no">ERROR</span> <span class="o">--</span> <span class="p">:</span> <span class="n">uninitialized</span> <span class="n">constant</span> <span class="no">ActiveRecord</span><span class="o">::</span><span class="no">ConnectionAdapters</span><span class="o">::</span><span class="no">ConnectionManagement</span> <span class="p">(</span><span class="no">NameError</span><span class="p">)</span> </code></pre> <p>我查了下资料， <a href="https://github.com/janko-m/sinatra-activerecord/pull/66" rel="nofollow" target="_blank" title="">这里</a> 发现了问题</p> <pre class="highlight ruby"><code><span class="no">Active</span> <span class="n">record</span> <span class="mf">5.0</span><span class="o">.</span><span class="mi">0</span> <span class="n">removes</span> <span class="n">the</span> <span class="no">ConnectionManagement</span> <span class="k">class</span> </code></pre> <p>对于新版的 5.1.1 你们这块是怎么解决的？</p> <p>除了</p> <pre class="highlight ruby"><code><span class="n">gem</span> <span class="s1">'activerecord'</span><span class="p">,</span> <span class="s1">'&lt; 5.0.0'</span><span class="p">,</span> <span class="ss">:require</span> <span class="o">=&gt;</span> <span class="s1">'active_record'</span> </code></pre> <p>还有其他的解决方式吗？或者另外一种解决方案也可以</p> JSmile Thu, 08 Jun 2017 11:47:27 +0800 https://ruby-china.org/topics/33173 https://ruby-china.org/topics/33173