Ruby: How to turn a hash into HTTP parameters?

Question

That is pretty easy with a plain hash like

{:a => \"a\", :b => \"b\"} 

which would translate into

\"a=a&b=b\"
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Answer 1

The best approach it is to use Hash.to_params which is the one working fine with arrays.

{a: 1, b: [1,2,3]}.to_param
"a=1&b[]=1&b[]=2&b[]=3"