Need explanation for this

rubyonrails-talk
1

hi please gice explanation for this

1: def json_attributes_for(model, *attrs) 2: attrs = [attrs].flatten.map(&:to_s) 3: model.attributes.delete_if{|k,v| !attrs.include?(k) }.to_json 4: end

2

hi please gice explanation for this

1: def json_attributes_for(model, *attrs) 2: attrs = [attrs].flatten.map(&:to_s) 3: model.attributes.delete_if{|k,v| !attrs.include?(k) }.to_json 4: end

It returns a json hash for the object, but only including the specified attributes. It's rewriting the wheel though, first of hashes have a slice method so that messing around with delete_if is not needed, and secondly to_json takes a :only option.

Fred