ruby array to javascript - Rails

Question

I am trying to pass a ruby array to a js view (js.erb format) but it doesn't work at all.

var array = "<%= @publishers_list %>";

The variable array is just set as a string with all the array's values in it.

Is there a way to keep the array format ?

Edit

I just realized it was because of my array format.

[{:label => "name1", :value => value1}, {:label => "name2", :value => value2}]

I tried to pass a simple array like:

[1,2,3]

and it worked fine.

The question is now: how can I pass this kind of array ? I really need to keep these hashes in it because I want to put it as a source of a jQuery autocomplete.

manoj · Accepted Answer · 2013-04-25 09:13:58Z

12

var array = <%= escape_javascript @publisher_list.to_json %>

answered Apr 25, 2013 at 9:13

manoj

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1 Comment

Mencls Over a year ago

Ok I tried with "raw" instead of escape_javascript and it worked. Thanks !

Christian-G · Accepted Answer · 2016-08-26 08:13:29Z

2

Try this:

var array = <%= j @publishers_list.to_json %>

j is shorthand for escape_javascript (thanks to commenter lfx_cool).

See the documentation: http://api.rubyonrails.org/classes/ERB/Util.html

To clean up your view code a little, you can also turn the @publishers_list into json in your controller. That way, in your view you can just use:

var array = <%= j @publishers_list %>

edited Aug 26, 2016 at 8:13

answered Apr 25, 2013 at 9:14

Christian-G

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3 Comments

Mencls Over a year ago

Still doesn't work.. when I write console.log(array) it displays nothing, the array is null.

Christian-G Over a year ago

From your controller do logger.debug(@publishers_list) and check your development.log to see what the output is.

lfx_cool Over a year ago

j is not shorthand for json_escape, j is shorthand for escape_javascript

rony36 · Accepted Answer · 2013-04-25 10:05:21Z

0

simply define a array in Controller's specific action like:

def rails_action
  @publishers_list = []
  # write some code to insert value inside this array
  # like: 
  # @publishers.each do |publisher|
  # @publishers_list << publisher.name
  # end 
end

js file which is associated with this action, like: rails_action.js.erb

now use your code

var array = [];
array = "<%= @publishers_list %>";

Thanks.

edited Apr 25, 2013 at 10:05

answered Apr 25, 2013 at 9:57

rony36

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2 Comments

gberger Over a year ago

The commented code in the controller could be changed to @publishers_list = @publishers.map &:name

rony36 Over a year ago

yes, @GuilhermeBerger you are right.:). It's worse to use loop.

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