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27 lines
1 KiB
Ruby
27 lines
1 KiB
Ruby
# frozen_string_literal: true
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class AddRepositoryRowConnections < ActiveRecord::Migration[7.0]
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def change
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create_table :repository_row_connections do |t|
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t.references :parent, index: true, foreign_key: { to_table: :repository_rows }, null: false
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t.references :child, index: true, foreign_key: { to_table: :repository_rows }, null: false
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t.references :created_by, foreign_key: { to_table: :users }
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t.references :last_modified_by, foreign_key: { to_table: :users }
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t.timestamps
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end
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change_table :repository_rows, bulk: true do |t|
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t.integer :parent_connections_count
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t.integer :child_connections_count
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end
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add_index :repository_row_connections,
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'LEAST(parent_id, child_id), GREATEST(parent_id, child_id)',
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name: 'index_repository_row_connections_on_connection_pair',
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unique: true
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add_check_constraint :repository_row_connections, 'parent_id != child_id',
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name: 'constraint_repository_row_connections_on_self_connection'
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end
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end
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