Rails - Parameter with multiple values in the URL when consuming an API via Active Resource

Question

I am consuming an API that expects me to do requests in the following format:

?filter=value1&filter=value2

However, I am using Active Resou

Answer 1

http://guides.rubyonrails.org/action_controller_overview.html#hash-and-array-parameters

Try :filter[] => value, :filter[] => value2

Answer 2

to create a valid query string, you can use

params = {a: 1, b: [1,2]}.to_query

http://apidock.com/rails/Hash/to_query
http://apidock.com/rails/Hash/to_param

Answer 3

You can generate query strings containing repeated parameters by making a hash that allows duplicate keys. Because this relies on using object IDs as the hash key, you need to use strings instead of symbols, at least for the repeated keys.

(reference: Ruby Hash with duplicate keys?)

params = { consumer_id: 1 } # replace with self.id
params.compare_by_identity
params["filter"] = "value1"
params["filter"] = "value2"
params.to_query #=> "consumer_id=1&filter=value1&filter=value2"