Passing array of parameters through get in rails

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You should stick to using a GET request if you are not changing the state of anything, and all you want to to access a read only value.

To send an array of ids to rails in a GET request simply name your variable with square brackets at the end. 

//angular snippet

$http.(method:'GET',
  ...
  params: {'channel_id':2, 'product_ids[]': productIds}  
  //where productIds is an array of integers
  ...
)

Do not concatenate your ids as a comma separated list, just pass them individually redundantly. So in the url it would look something like this:

?channel_id=2&product_ids[]=6900&product_ids[]=6901

url encoded it will actually be more like this:

?channel_id=2&product_ids%5B%5D=6900&product_ids%5B%5D=6901

Rails will separate this back out for you.

Parameters: {"channel_id"=>"2", "product_ids"=>["6900", "6901"]}

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