foodsoft/db/migrate/011_create_comments.rb

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class CreateComments < ActiveRecord::Migration[4.2]
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def self.up
create_table :comments, :force => true do |t|
t.column :title, :string, :limit => 50, :default => ""
t.column :comment, :string, :default => ""
t.column :created_at, :datetime, :null => false
t.column :commentable_id, :integer, :default => 0, :null => false
t.column :commentable_type, :string, :limit => 15,
:default => "", :null => false
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t.column :user_id, :integer, :default => 0, :null => false
end
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add_index :comments, ["user_id"], :name => "fk_comments_user"
end
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def self.down
drop_table :comments
end
end