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函数调用和检查结果在DustJs中

我将连接角色与灰尘模板ejs模板结合起来就像这种语法

<% if (userCan('impersonate')) { %>
  <button id="impersonate">Impersonate</button>
<% } %>  
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那是在玉

if userCan('impersonate')
  button#impersonate Impersonate
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怎么在灰尘中这样做?

            {@eq key=userCan('edit data') value="true" }
                <td><a href='/assets/edit/{.ID_ASSET}'>Edit</a></td>
                <td><a href='/assets/delete/{.ID_ASSET}'>Delete</a></td>
            {:else}

            {/eq}
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这段代码给我一个错误

Wed, 06 Jan 2016 16:57:47 GMT uncaughtException Expected end tag for assets but it was not found. At line : 42, column : 13
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编辑:我有这个 {@contextDump key="full"/}

   "tail": {},
  "isObject": true,
  "head": {
    "enrouten": {
      "routes": {},
      "path": "function path(name, data) {var route;route = this.routes[name];if (typeof route === 'string') {return path2regexp.compile(route)(data);}return …
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dust.js dust-helpers

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