Sending parameters from controller to view

rubyonrails-talk
1

Hi all, I want to create charts in my website. I want to fill them with variables. So in my controller, I put the variables I want to use :

class ChartsController < ApplicationController   def show_one_publisher_seven_days     @title = 'foo'   end end

And in my view (show_one_publisher_seven_days.haml), I want to assign my javascript variable with the variable I created in my controller.

%script{:type => "text/javascript"}

  var title_text = <% @title %> <<<===============

%p This is the chart for one publisher for the last seven days %div{:id => "7days_one_publisher", :style => "width: 800px; height: 400px; margin: 0 auto"}

but it doesn't work... Do you know how to do that ?

Thanks

2

It is haml not erb. Try = "var title_text = #{@title}"

Check the html generated in the browser to check it is what you expect. By the way, it is generally considered bad form to put javascript like this in the view. Ideally all javascript should be in separate files.

Colin

3

def show_one_publisher_seven_days @title = 'foo' end

...

%script{:type => "text/javascript"}

   var title\_text = &lt;% @title %&gt;       &lt;&lt;&lt;===============

Can you tell us *how* it's not working, i.e., what it does instead? Are you getting some kind of Javascript error?

I don't know haml yet, but it looks to me like that would probably result in saying:

        var title_text = foo

whereas you want::

        var title_text = 'foo';

Try adding the quotes and semicolon and see what happens. If that doesn't fix it, see if you're getting a JS error, and if so, tell us what it is.

-Dave

4

Hi all, I want to create charts in my website. I want to fill them with variables. So in my controller, I put the variables I want to use :

class ChartsController < ApplicationController def show_one_publisher_seven_days @title = 'foo' end end

And in my view (show_one_publisher_seven_days.haml), I want to assign my javascript variable with the variable I created in my controller.

%script{:type => "text/javascript"}

   var title\_text = &lt;% @title %&gt;       &lt;&lt;&lt;===============

It is haml not erb. Try = "var title_text = #{@title}"

Oops, quickly returning to add to this after seeing Dave's response = "var title_text = '#{@title}'"

Colin

5

Just to clarify this, I think the = "... syntax will work. I have not seen the == syntax previously, it does work, but I cannot see it documented at http://haml-lang.com/docs/yardoc/file.HAML_REFERENCE.html

Am I just missing it there?

Colin

6

Thanks a lot Colin !!! With => = "var title_text = '#{@title}'" It works perfectly !