add key=value to a hash inside Rails without having to modify Model

Question

I have an array of objects (hash) and I want to add a new key to the list of objects, iterating with .each method on it.

myArray = [];
@VARIABLE.each_with_index do |ITEM, index|
  myArray << ITEM
  myArray[:key]="value"
end

but Rails keeps returning me the error can't write unknown attribute key

I don't wanna modify Rails Model structure... I'm basically creating a helper array of objects to loop them in a JS React component in the view...

(JS dev here)

Answer 1

obj.attributes.merge({key:value}) solved the problem.