Rails: Adding migration to add an array (default empty)

Question

I\'m trying to add a column called share to one of my resources. The idea is that users can upload documents and share them with other (specific) users, and the array contai

Answer 1

if you want support all databases you must serialize the array in a String

class Documents < ActiveRecord::Base
 serialize :share
end

class AddShareToDocuments < ActiveRecord::Migration
 def change
   add_column :documents, :share, :string, :default => []
 end 
end

In case of Postgresql and array datatype I found https://coderwall.com/p/sud9ja