Passing a Ruby variable in a JavaScript function

Question

I have the following code in my HTML where I am trying to pass a Ruby variable to the JavaScript function. Can someone please help me with the syntax?

<% @level2.each_with_index do |row2, index2| %> 
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<a href="javascript:validateUser_com("<%= #{index2} %>")" >Edit</a>

Michelle Tilley · Accepted Answer · 2012-11-30 03:08:47Z

2

You're using double quotes twice. For example, if index2 is 1, you end up with the following JavaScript:

<a href="javascript:validateUser_com("1")" >

Since you're using double quotes for the HTML attribute, you should escape the inner quotes or use single quotes. Furthermore, the Ruby expression is not a string, so there's no need for interpolation:

<a href="javascript:validateUser_com('<%= index2 %>')" >

edited Nov 30, 2012 at 3:08

answered Nov 30, 2012 at 2:53

Michelle Tilley

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2 Comments

Pi Horse Over a year ago

The html page does not load....it shows some error in the syntax itself....multiple errors around the line....so definitely something wrong with the syntax.

Michelle Tilley Over a year ago

Ah, not sure how I missed this, but what's inside the Ruby expression is not a string--so no need for #{}. I'll update the answer.

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