render
& render partial:
-
render 'some_view'
is a shorthand forrender partial: 'some_view'
. -
render file: 'view'
will look for a fileview.html.erb
and NOT_view.html.erb
(.erb
or any other renderer you use) -
render
can pass local variables for the partial if you do not use collections or layouts, likerender 'some/path/to/my/partial', custom_var: 'Hello'
yield
& content_for
yield
is typically used in layouts. It tells Rails to put the content for this block at that place in the layout.- When you do
yield :something
associated withcontent_for :something
, you can pass a block of code (view) to display where theyield :something
is placed (see example below).
A small example about yield:
In your layout:
<html>
<head>
<%= yield :html_head %>
</head>
<body>
<div id="sidebar">
<%= yield :sidebar %>
</div>
</body>
In one of your view:
<% content_for :sidebar do %>
This content will show up in the sidebar section
<% end %>
<% content_for :html_head do %>
<script type="text/javascript">
console.log("Hello World!");
</script>
<% end %>
This will produce the following HTML:
<html>
<head>
<script type="text/javascript">
console.log("Hello World!");
</script>
</head>
<body>
<div id="sidebar">
This content will show up in the sidebar section
</div>
</body>
Posts that might help:
Links to documentation & guides: