Ruby-on-rails Rails：使用控制器渲染 js.erb 模板
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Rails: rendering the js.erb template using the controller
提问by chourobin
I have a rails app trying to incorporate some AJAX where clicking new opens a modal window and a form. I want to be able to display the validation errors if it fails so in my create action, i thought about re-rendering the new.js.erb file. Is this the right approach?
我有一个 rails 应用程序试图合并一些 AJAX，其中单击新打开一个模式窗口和一个表单。如果验证错误失败，我希望能够显示验证错误，因此在我的创建操作中，我考虑重新呈现 new.js.erb 文件。这是正确的方法吗？
def create
@place = Place.new(params[:place])
if @place.save
redirect_to places_path, :notice => "Successfully created place"
else
render "new.js.erb"
end
end
The result I get is escaped js text in my browser like:
我得到的结果是浏览器中转义的 js 文本，例如：
$("#new_grouping").html("<div class=\"modal-header\">\n <a class=\"close\" data- dismiss=\"modal\">×<\/a>\n <h3>Create a new menu section<\/h3>\n<\/div>\n<form accept-charset=\"UTF-8\" action=\"/places/1-mama-s-pizza/groupings\" class=\"simple_form new_grouping\" id=\"new_grouping\" method=\"post\" novalidate=\"novalidate\">
I've tried putting various options into the render block but no luck. Any tips?
我试过将各种选项放入渲染块，但没有运气。有小费吗？
回答by Vapire
The best practice would be to support both, AJAX and Non-AJAX calls, in case the user has javascript turned off for any reason.
最佳实践是同时支持 AJAX 和非 AJAX 调用，以防用户因任何原因关闭 javascript。
def create
@place = Place.new(params[:place])
respond_to do |format|
if @place.save
format.html { redirect_to places_path, :notice => "Successfully created place" }
format.js # renders create.js.erb, which could be used to redirect via javascript
else
format.html { render :action => 'new' }
format.js { render :action => 'new' }
end
end
end
The render :action => 'new'actually renders the template of the controller action newwhich results to new.html.erbrespectively to new.js.erbdepending if it's a non-AJAX or an AJAX call.
在render :action => 'new'实际呈现控制器动作的模板new，其结果new.html.erb分别new.js.erb取决于它是否是一个非AJAX或AJAX调用。
In new.js.erbgoes your ERB/javascript code:
在new.js.erb去您的ERB / javascript代码：
$("#new_grouping").html("<%= escape_javascript(...) %>">
回答by ibylich
As i know, rendering partial in controller is a bad idea, because then response can be without content-type and some browsers can't understand this. if it is some file attached to action you should write
据我所知，在控制器中渲染部分是一个坏主意，因为响应可能没有内容类型，并且某些浏览器无法理解这一点。如果它是附加到操作的某个文件，您应该编写
render :action => "create"
or if you need just render a singe partial then in your action file write
或者如果你只需要渲染一个部分然后在你的动作文件中写
<%= render :partial => "path/to/partial" %>
as i said, then you won't have problems with content-type in response
正如我所说的那样，您将不会遇到 content-type 作为响应的问题
