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17 lines
560 B
Ruby
17 lines
560 B
Ruby
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class MakeExpressionsLessGeneric < ActiveRecord::Migration
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def up
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rename_column :expressions, :parent_id, :post_id
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rename_column :expressions, :expression_type_id, :expression_index
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remove_column :expressions, :parent_type
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add_index :expressions, [:post_id, :expression_index, :user_id], unique: true, name: 'unique_by_user'
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end
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def down
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rename_column :expressions, :post_id, :parent_id
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rename_column :expressions, :expression_index, :expression_type_id
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add_column :expressions, :parent_type, :string, null: true
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end
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end
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