blocks|key|1355382|text|您应该能够在您的respond_to块中执行以下操作：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1355383|respond_to+do+%7Cformat%7C
++++format.json+
++++render+:partial+=>+"users/show.json"
end|code-block|syntax|javascript|1355384|这将在app/views/users/_show.json.erb中呈现模板。|1355385|entityMap^0|8|A|0|0|3|U|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|N|$]]

You should be able to do something like this in your <code>respond_to</code> block:

<pre><code>respond_to do |format|
 format.json 
 render :partial =&gt; "users/show.json"
end
</code></pre>

which will render the template in <code>app/views/users/_show.json.erb</code>.

blocks|key|1355484|text|尝试添加一个视图users/show.json.erb这应该在您请求JSON格式时呈现，并且您还获得了erb呈现它的额外好处，因此您的文件可能如下所示|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1355485|{
++++"first_name":+"<%25=+@user.first_name.to_json+%25>",
++++"last_name":+"<%25=+@user.last_name.to_json+%25>"
}|code-block|syntax|javascript|1355486|entityMap^0|8|J|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Try adding a view <code>users/show.json.erb</code> This should be rendered when you make a request for the JSON format, and you get the added benefit of it being rendered by erb too, so your file could look something like this

<pre><code>{
 "first_name": "&lt;%= @user.first_name.to_json %&gt;",
 "last_name": "&lt;%= @user.last_name.to_json %&gt;"
}
</code></pre>

blocks|key|1355572|text|只需添加包含内容的show.json.erb文件|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1355573|<%25=+@user.to_json+%25>|code-block|syntax|javascript|1355574|有时，当你需要一些额外的帮助器方法，而这些方法在控制器中是不可用的，例如image_path(@user.avatar)或其他东西来生成JSON中的附加属性时，它是有用的：|1355575|<%25=+@user.attributes.merge(:avatar+=>+image_path(@user.avatar)).to_json+%25>|1355576|entityMap^0|9|D|0|0|10|O|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|P|$]]

Just add <code>show.json.erb</code> file with the contents

<pre><code>&lt;%= @user.to_json %&gt;
</code></pre>

Sometimes it is useful when you need some extra helper methods that are not available in controller, i.e. <code>image_path(@user.avatar)</code> or something to generate additional properties in JSON:

<pre><code>&lt;%= @user.attributes.merge(:avatar =&gt; image_path(@user.avatar)).to_json %&gt;
</code></pre>

blocks|key|1355605|text|这可能是一个更好的选择，而且比ERB更快：https://github.com/dewski/json_builder|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1355606|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/dewski/json_builder^0|L|12|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

This is potentially a better option and faster than ERB: <a href="https://github.com/dewski/json_builder" rel="noreferrer">https://github.com/dewski/json_builder</a>

blocks|key|1355698|text|如果您正在寻找一种更干净的ERb语法替代方案，那么RABL可能是我所见过的最好的解决方案。作为其他解决方案的json_builder和argonaut似乎都有些过时，如果不打补丁就不能在Rails3.1上工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1355699|可以通过gem或查看GitHub存储库获得RABL；这也是很好的例子。|1355700|https://github.com/nesquena/rabl|offset|length|1355701|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|W|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@$F|R|G|S|1|T]]|A|$]]|$1|H|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|E]]]]

RABL is probably the nicest solution to this that I've seen if you're looking for a cleaner alternative to ERb syntax. json_builder and argonaut, which are other solutions, both seem somewhat outdated and won't work with Rails 3.1 without some patching. 

RABL is available via a gem or check out the GitHub repository; good examples too

<a href="https://github.com/nesquena/rabl">https://github.com/nesquena/rabl</a>

blocks|key|1355770|text|为了那些碰巧出现在这个页面上的其他人的缘故，更新这个答案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1355771|在Rails3中，您只需要在views/users/show.json.erb中创建一个文件。视图将可以使用@user对象(就像html一样)。你甚至不再需要to_json了。|offset|length|style|CODE|1355772|总而言之，它只是|1355773|#+users+contoller
def+show
++@user+=+User.find(+params[:id]+)
++respond_to+do+%7Cformat%7C
++++format.html
++++format.json
++end
end|code-block|syntax|javascript|1355774|和|1355775|/*+views/users/show.json.erb+*/
{
++++"name"+:+"<%25=+@user.name+%25>"
}|1355776|entityMap^0|0|E|P|1I|5|27|7|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@$D|W|E|X|F|G]|$D|Y|E|Z|F|G]|$D|10|E|11|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|12|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|13|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|14|8|@]|9|@]|A|$]]|$1|Q|3|R|5|L|7|15|8|@]|9|@]|A|$M|N]]|$1|S|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|T|$]]

Just to update this answer for the sake of others who happen to end up on this page.

In Rails 3, you just need to create a file at <code>views/users/show.json.erb</code>. The <code>@user</code> object will be available to the view (just like it would be for html.) You don't even need <code>to_json</code> anymore.

To summarize, it's just

<pre><code># users contoller
def show
 @user = User.find( params[:id] )
 respond_to do |format|
 format.html
 format.json
 end
end
</code></pre>

and

<pre><code>/* views/users/show.json.erb */
{
 "name" : "&lt;%= @user.name %&gt;"
}
</code></pre>

blocks|key|1355803|text|我是RoR的新手，这是我发现的。您可以直接呈现json格式。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1355804|def+YOUR_METHOD_HERE
++users+=+User.all
++render+json:+{allUsers:+users}+#+!+rendering+all+users
END|code-block|syntax|javascript|1355805|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|$]]

Im new to RoR this is what I found out. you can directly render a json format

<pre><code>def YOUR_METHOD_HERE
 users = User.all
 render json: {allUsers: users} # ! rendering all users
END
</code></pre>

Suppose you're in your users controller and you want to get a json response for a show request, it'd be nice if you could create a file in your views/users/ dir, named show.json and after your users#show action is completed, it renders the file.

Currently you need to do something along the lines of:

<pre><code>def show
 @user = User.find( params[:id] )
 respond_to do |format|
 format.html
 format.json{
 render :json =&gt; @user.to_json
 }
 end
end
</code></pre>

But it would be nice if you could just create a show.json file which automatically gets rendered like so:

<pre><code>def show
 @user = User.find( params[:id] )
 respond_to do |format|
 format.html
 format.json
 end
end
</code></pre>

This would save me tons of grief, and would wash away that horribly dirty feeling I get when I render my json in the controller

In Rails, how do you render JSON using a view?

GitHub

JSON

假设您在用户控制器中，并且希望获得显示请求的json响应，如果您可以在视图/用户/目录中创建一个名为show.json的文件，并在users#show操作完成后呈现该文件，那就更好了。目前，您需要做的事情大致如下：def show  @user = User.find( params[:id] )  respond_t...

问在Rails中，如何使用视图呈现JSON？
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问在Rails中，如何使用视图呈现JSON？EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问在Rails中，如何使用视图呈现JSON？
EN