> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
        <span class="token keyword">return</span> err
    <span class="token punctuation">}</span>

    <span class="token keyword">return</span> txDao<span class="token punctuation">.</span><span class="token function">Delete</span><span class="token punctuation">(</span>article<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctua