Javascript in partial (Ruby on Rails)

Question

For example i have many comments rendered for the post.

<%= render post.comments %>

And in comments partial i have javascript wich will repeated so many times how many comments i have

_comment.html.erb

<div id="content_<%= comment.id %>"><%= comment.content %></div>
<script>$("content_<%= comment.id %>").click(function() { alert('content of comment <%= comment.id %>') });</script>

What is the best way to avoid repeating javascript in source code? I tried to create *_comment.js.erb* file and put javascript there, but i don't understand how to make it work.

Can anyone please explain me how to solve this problem?

davidrac · Accepted Answer · 2012-07-07 16:23:51Z

3

You can change the implementation to have a single js file under app/assets/javascripts with your script inside. change the selector of the script to match the class of the comments instead of a unique ID. If required, use javascript to read the content of elements, instead of doing this on the server as you do now.

answered Jul 7, 2012 at 16:23

davidrac

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4 Comments

Bennington Over a year ago

But if i will have script in assets/javascripts how can i tell rails that each comment have his own script? Thats why i'm using content_<%= comment.id %>

davidrac Over a year ago

You're right. The idea is to have the same script for all, and differentiate between the comments in the script code itself. I assume this is the same logic for all the comments, only with different data.

Bennington Over a year ago

Thanks for helping, but can you please explain more?

davidrac Over a year ago

in your selector, use class, instead of id (something like: $('.comment')). in the alert, use $(this).attr("id"), or something similar with another attribute in order to fetch the actual data. The code should be roughly something like this: $('.comment').click(function() { alert($(this).attr("id")) });

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