content_for are not rendering in partial views
Question
I have a rails app which uses a layout
The simplified version looks like this:
<html>
<head>
<%= render 'layouts/head' # renders the "layouts/_head.html.erb" partial correctly
# the most head (css/js) content gets implemented here %>
</head>
<body>
<%= yield # renders the current action %>
<!-- implement alls scripts which should be exectued on the bottom of the page -->
<%= content_for :scripts_bottom %>
</body>
</html>
in my `layouts/_head.html.erb' I use
<%= content_for :scripts_head %>
<!-- it seems `content_for` instead of `yield` appends content -->
In my partials I place the following snippets to append them :scripts_head. (some of my partials should put javaScripts
<% content_for :scripts_head do %>
<%= javascript_include_tag 'some_script' %>
<% end %>
The content_for in the `layouts/head' renders nothing
How can I resolve that?
It looks like that partials are not able to append their content_for content when the content_for :blah do is placed BEHIND the echoing content_for / yield tag.
If I try try content_for :scripts_bottom it will get rendered at the bottom of the page.
Thanks in advance
Rails 3.2.14 ruby 2.0.0p247
3 answers
solution1
0 2013-12-01 00:36:51
代替provide ，尝试<%= content_for :scripts_head %>
solution2
0 2013-12-01 00:49:06
If you want to use content_for then you need to yield it in your head instead of render.
So your header would look like:
<%= yield :scripts_head %>
Alternatively you can remove the content_for in your partial and just have the JS by itself like this:
<%= javascript_include_tag 'some_script' %>
Then you wouldn't have to change your layout file.
solution3
0 2013-12-01 00:49:19
在layouts/head局部中，使用yield :scripts_head而不是content_for
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