blocks|key|1076255|text|可以这样做的一种方法是创建包含要呈现的对象的散列，然后将其传递给render方法。如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1076256|respond_to+do+%7Cformat%7C
++format.json++{+render+:json+=>+{:moulding+=>+@moulding,+
++++++++++++++++++++++++++++++++++:material_costs+=>+@material_costs+}}
end|code-block|syntax|javascript|1076257|如果模型不是通过活动记录关联的，这可能是您最好的解决方案。|1076258|如果关联确实存在，则可以将:include参数传递给render调用，如下所示：|offset|length|style|CODE|1076259|respond_to+do+%7Cformat%7C
++format.json++{+render+:json+=>+@moulding.to_json(:include+=>+[:material_costs])}
end|1076260|请注意，如果采用这种方法，Rails将自动从@moulding变量加载该变量，而不必在上面的小节中检索@material_costs变量。|1076261|entityMap^0|0|0|0|D|8|0|0|M|9|1F|F|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|X|8|@$K|Y|L|Z|M|N]]|9|@]|A|$]]|$1|O|3|P|5|D|7|10|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|11|8|@$K|12|L|13|M|N]|$K|14|L|15|M|N]]|9|@]|A|$]]|$1|S|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|T|$]]

One way you could do this is to create a hash with the objects you want to render, and then pass that to the render method. Like so:

<pre><code>respond_to do |format|
 format.json { render :json =&gt; {:moulding =&gt; @moulding, 
 :material_costs =&gt; @material_costs }}
end
</code></pre>

If the models aren't associated through active record, that's probably your best solution.

If an association does exist, you can pass an <code>:include</code> argument to the render call, like so:

<pre><code>respond_to do |format|
 format.json { render :json =&gt; @moulding.to_json(:include =&gt; [:material_costs])}
end
</code></pre>

Note that you wouldn't have to retrieve the <code>@material_costs</code> variable in the section above if you take this approach, Rails will automatically load it from the <code>@moulding</code> variable.

blocks|key|861638|text|一个控制器只能返回一个响应。如果要将所有这些对象发回，则必须将它们放入一个JSON对象中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|861639|这样如何：|861640|def+calculate_quote
++@moulding+=+Moulding.find(params[:id])
++@material_costs+=+MaterialCost.all
++response+=+{+:moulding+=>+@moulding,+:material_costs+=>+@material_costs+}
++respond_to+do+%7Cformat%7C
++++format.json++{+render+:json+=>+response+}
++end
end|code-block|syntax|javascript|861641|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

A controller can only return one response. If you want to send all these objects back, you have to put them in one JSON object.

How about:

<pre><code>def calculate_quote
 @moulding = Moulding.find(params[:id])
 @material_costs = MaterialCost.all
 response = { :moulding =&gt; @moulding, :material_costs =&gt; @material_costs }
 respond_to do |format|
 format.json { render :json =&gt; response }
 end
end
</code></pre>

blocks|key|861663|text|我做了一些像这样的事情|type|unstyled|depth|inlineStyleRanges|entityRanges|data|861664|respond_to+do+%7Cformat%7C
++++++format.html+#+show.html.erb
++++++format.json+{+render+:json+=>+{:cancer_type+=>+@cancer_type,+:cancer_symptoms+=>+@cancer_symptoms+}}|code-block|syntax|javascript|861665|结果如下所示|861666|{"cancer_type":{"created_at":"2011-12-31T06:06:30Z","desc":"dfgeg","id":2,"location":"ddd","name":"edddd","sex":"ddd","updated_at":"2011-12-31T06:06:30Z"},"cancer_symptoms":[]}|861667|所以它是有效的。|861668|谢谢你们|861669|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

I did something like

<pre><code>respond_to do |format|
 format.html # show.html.erb
 format.json { render :json =&gt; {:cancer_type =&gt; @cancer_type, :cancer_symptoms =&gt; @cancer_symptoms }}
</code></pre>

here is the result

<pre><code>{"cancer_type":{"created_at":"2011-12-31T06:06:30Z","desc":"dfgeg","id":2,"location":"ddd","name":"edddd","sex":"ddd","updated_at":"2011-12-31T06:06:30Z"},"cancer_symptoms":[]}
</code></pre>

So it is working

Thank you guys

blocks|key|1076381|text|我没有看到一个更复杂的例子，我想加入下面的内容。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1076382|++def+calculate_quote
++++moulding+=+Moulding.find(params[:id])
++++material_costs+=+MaterialCost.all

++++respond_to+do+%7Cformat%7C
++++++#+there+times+you'll+need+multiple+formats,+no+need+to+overuse+instance+vars:
++++++format.html+do
++++++++@moulding+=+moulding
++++++++@material_costs+=+material_costs
++++++end
++++++format.json+do
++++++++#+in+case+of+as_json,+you+can+provide+additional+options+
++++++++#+to+include+associations+or+reduce+payload.
++++++++moulding_json+=+moulding.as_json
++++++++material_costs_json+=+material_costs.as_json
++++++++render+json:+{
+++++++++++moulding:+moulding_json,
+++++++++++material_costs:+material_costs_json+
++++++++}
++++++end
++++end
++end|code-block|syntax|javascript|1076383|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Not seeing a more complex example I wanted to throw in the following.
<pre class="lang-rb prettyprint-override"><code> def calculate_quote
 moulding = Moulding.find(params[:id])
 material_costs = MaterialCost.all

 respond_to do |format|
 # there times you'll need multiple formats, no need to overuse instance vars:
 format.html do
 @moulding = moulding
 @material_costs = material_costs
 end
 format.json do
 # in case of as_json, you can provide additional options 
 # to include associations or reduce payload.
 moulding_json = moulding.as_json
 material_costs_json = material_costs.as_json
 render json: {
 moulding: moulding_json,
 material_costs: material_costs_json 
 }
 end
 end
 end
</code></pre>

I am trying to render results from more than one model in JSON. The following code in my controller only renders the first result set:

<pre><code> def calculate_quote
 @moulding = Moulding.find(params[:id])
 @material_costs = MaterialCost.all

 respond_to do |format|
 format.json { render :json =&gt; @moulding }
 format.json { render :json =&gt; @material_costs }
 end
 end
</code></pre>

Any help would be much appreciated, thanks.

Ruby on Rails - Render JSON for multiple models

JSON

我正在尝试在JSON中呈现来自多个模型的结果。我的控制器中的以下代码仅呈现第一个结果集：  def calculate_quote    @moulding = Moulding.find(params[:id])    @material_costs = MaterialCost.all    respond_to ...

问Ruby on Rails -为多个模型呈现JSON
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