How to comment code in Rails views?
As I'm playing with Rails and developing views I often want to comment out code. Simple enough with classes & models but views are a bit more tricky.
What's best way to comment code in a view so it's not interpreted by, well, anything... HTML gives us <!-- commented Rails code here -->
though code enclosed here seems to get interpreted anyway?!? 开发者_开发百科Or is there a more Railsy way?
<% code code # comment %>
USED to work but I think that was accidental.
You were always supposed to put comments in separate comment tags <%# comment %>
Note NO SPACE before the pound.
Now the old loophole is closed (I forget whether 'now' means Ruby 1.8 or Rails 3 or what) so that:
<% code code # this runs too %>
<% # also runs %>
<%# the only way to comment out %>
I use this all the time
<%# This is a comment %>
The reason Ruby code would be executed inside <!-- -->
HTML comments is because all of the server side code (ie. Ruby) is interpreted first, and then the output is sent to the client, at which point the browser interprets <!-- -->
as a comment. As the other answers said, use <% #comment %>
to comment within a Rails view.
Although (and i'm hoping to be corrected here) you have to be careful because i've had some really strange behavior when doing something like this:
<% if (my_boolean) # Commenting on this if-block %>
where it will affect the HTML that directly follows that (even if it's on another line).
Anyone?
And would this qualify as an answer, or a comment?
<% #comment here %>
:D
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