https://ruby-china.org/kidult en-us <pre class="highlight ruby"><code><span class="n">_weisite</span> <span class="o">=</span> <span class="no">Weisite</span><span class="p">.</span><span class="nf">find_by</span><span class="p">(</span><span class="ss">user: </span><span class="n">current_user</span><span class="p">)</span> <span class="n">_weimembers</span> <span class="o">=</span> <span class="no">Weimember</span><span class="p">.</span><span class="nf">where</span><span class="p">(</span><span class="ss">weisite: </span><span class="n">_weisite</span><span class="p">)</span> <span class="vi">@weishoporders</span> <span class="o">=</span> <span class="no">Weishoporder</span><span class="p">.</span><span class="nf">where</span><span class="p">(</span><span class="ss">weimember_id: </span><span class="n">_weimembers</span><span class="p">).</span><span class="nf">order</span><span class="p">(</span><span class="s2">"created_at desc"</span><span class="p">)</span> </code></pre> <p>这样可以把一个站点的订单都查询出来</p> <p>但是生成的 SQL 语句为：</p> <pre class="highlight sql"><code><span class="k">SELECT</span> <span class="nv">"weishoporders"</span><span class="p">.</span><span class="o">*</span> <span class="k">FROM</span> <span class="nv">"weishoporders"</span> <span class="k">WHERE</span> <span class="nv">"weishoporders"</span><span class="p">.</span><span class="nv">"weimember_id"</span> <span class="k">IN</span> <span class="p">(</span><span class="k">SELECT</span> <span class="nv">"weimembers"</span><span class="p">.</span><span class="nv">"id"</span> <span class="k">FROM</span> <span class="nv">"weimembers"</span> <span class="k">WHERE</span> <span class="nv">"weimembers"</span><span class="p">.</span><span class="nv">"weisite_id"</span> <span class="o">=</span> <span class="mi">3</span><span class="p">)</span> <span class="k">ORDER</span> <span class="k">BY</span> <span class="n">created_at</span> <span class="k">desc</span> </code></pre> <p>有更好的查询方式吗？</p> kidult Tue, 12 Aug 2014 16:20:59 +0800 https://ruby-china.org/topics/20982 https://ruby-china.org/topics/20982