Manuel Bustillo
8c12884212
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30 lines
1.0 KiB
Ruby
30 lines
1.0 KiB
Ruby
# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
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class CreateGroupAffinities < ActiveRecord::Migration[8.0]
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disable_ddl_transaction!
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def change
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create_table :group_affinities, if_not_exists: true do |t|
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t.references :group_a, type: :uuid, null: false, foreign_key: { to_table: :groups }
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t.references :group_b, type: :uuid, null: false, foreign_key: { to_table: :groups }
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t.float :discomfort, null: false
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t.timestamps
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end
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add_check_constraint :group_affinities, 'group_a_id != group_b_id', name: :check_distinct_groups, if_not_exists: true
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add_check_constraint :group_affinities, 'discomfort >= 0 AND discomfort <= 2', if_not_exists: true
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reversible do |dir|
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dir.up do
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execute <<~SQL
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CREATE UNIQUE INDEX CONCURRENTLY uindex_group_pair ON group_affinities (least(group_a_id, group_b_id), greatest(group_a_id, group_b_id));
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SQL
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end
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dir.down do
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remove_index :group_affinities, name: :uindex_group_pair, if_exists: true
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end
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end
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end
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end
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