[Rails] two tables in one migration file?

i already have 10_create_comments migration file.
that file contains
create_table :comments do |t|
t.column :title, :text
t.column :foto_id, :integer
t.column :user_id, :integer
t.column :created_at, :datetime
t.column :updated_at, :datetime
end

this is design for photo commenting purpose. i i need another comment
setup under the message so how do i use this migration file to that?
any ideas?

nirosh

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