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Default value rails migration

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default value rails migration 

t.integer :col_name, :default => 0
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rails migration add default value 

change_column :users, :admin, :boolean, :default => false
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rails migration update column default value 

class MigrationName < ActiveRecord::Migration
	def change
    	change_column :my_table, :my_column, :data_type, deafult: "value"
	end
end

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default value rails migration
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