https://ruby-china.org/jl5161 en-us <p>服务器采用阿里云 用 PUMA 启动生产环境 运行一段时间之后 总是在几分钟内 cpu99%+ 由于目前处于测试阶段故而没有请求发生 请教大概什么原因？ 新手求救</p> <p>补充阿里云 CPU 截图 2 分钟内瞬间上 100% <img src="https://l.ruby-china.com/photo/2018/a0f6f23b-844f-4d0c-b981-7906beb67bd8.png!large" title="" alt=""></p> jl5161 Thu, 03 May 2018 14:43:18 +0800 https://ruby-china.org/topics/36674 https://ruby-china.org/topics/36674 <p>在阿里云上 用</p> <pre class="highlight plaintext"><code>rails s -e production </code></pre> <p>启动后 无法正确访问 求教不能直接用 puma 启动吗？非得结合 Nginx 吗？</p> jl5161 Mon, 23 Apr 2018 19:01:47 +0800 https://ruby-china.org/topics/35516 https://ruby-china.org/topics/35516 <p>执行命令后并没有效果 求教</p> jl5161 Fri, 20 Apr 2018 11:41:23 +0800 https://ruby-china.org/topics/35498 https://ruby-china.org/topics/35498 <p>并没转码 请问如何处理 在拼接 URI 时</p> jl5161 Mon, 16 Apr 2018 15:45:15 +0800 https://ruby-china.org/topics/35462 https://ruby-china.org/topics/35462 <p>表 T</p> <table class="table table-bordered table-striped"> <tbody><tr> <th>from</th> <th>to</th> </tr> <tr> <td>a</td> <td>b</td> </tr> <tr> <td>a</td> <td>b</td> </tr> <tr> <td>c</td> <td>d</td> </tr> <tr> <td>b</td> <td>a</td> </tr> <tr> <td>c</td> <td>a</td> </tr> </tbody></table> <p>我想要的结果是 查询条件 from = a 或者 to = a 下不重复的数据 并去重 若 from = a，to = xx 或者 from = xx，to = a 只算一条的话 请问如何去重</p> <pre class="highlight ruby"><code><span class="no">T</span><span class="p">.</span><span class="nf">where</span><span class="p">(</span><span class="ss">from: </span><span class="n">a</span><span class="p">).</span><span class="nf">or</span><span class="p">(</span><span class="no">T</span><span class="p">.</span><span class="nf">where</span><span class="p">(</span><span class="ss">to: </span><span class="n">a</span><span class="p">)).</span><span class="nf">select</span><span class="p">(</span><span class="ss">:from</span><span class="p">,</span> <span class="ss">:to</span><span class="p">).</span><span class="nf">distinct</span> </code></pre> <p>补充：因为我要的是 xx 哪个数据 目前对取出的数据通过 array.uniq 去重 但这样效率很低吧</p> jl5161 Fri, 13 Apr 2018 15:51:05 +0800 https://ruby-china.org/topics/35439 https://ruby-china.org/topics/35439 <p>1.命令行里可以直接设置默认值吗？ 2.命令行创建完 model 后再 rake db:migrate 之前去对应的 migration 里修改后再 rake db:migrate？ 3.若已经 rake db:migrate 后 怎么再设置默认值？重新建一个 migration 吗？ </p> <p>如上 求教 谢谢</p> jl5161 Wed, 11 Apr 2018 11:54:26 +0800 https://ruby-china.org/topics/35425 https://ruby-china.org/topics/35425 <p>如题 并会自动增加路由 求教 到处没收到！！！谢谢</p> jl5161 Fri, 23 Mar 2018 10:57:31 +0800 https://ruby-china.org/topics/35308 https://ruby-china.org/topics/35308 <p>比如 之前创建的 model 在数据库中显示的为 a-b-c-d 现在想调整显示的顺序为 a-c-b-d 对应的 migration 如何写？谢谢 def change xxxx 应该如何写 end</p> jl5161 Tue, 06 Mar 2018 17:34:46 +0800 https://ruby-china.org/topics/35178 https://ruby-china.org/topics/35178 <p><img src="https://l.ruby-china.com/photo/2018/13224d31-ac84-4696-81d1-f335919987c9.png!large" title="" alt=""></p> jl5161 Mon, 05 Mar 2018 16:27:48 +0800 https://ruby-china.org/topics/35137 https://ruby-china.org/topics/35137 <p>求救</p> jl5161 Tue, 17 Oct 2017 09:16:49 +0800 https://ruby-china.org/topics/34385 https://ruby-china.org/topics/34385