39 lines
1.1 KiB
Ruby
39 lines
1.1 KiB
Ruby
class AddForeignKeysToTodos < ActiveRecord::Migration[4.2]
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include Gitlab::Database::MigrationHelpers
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class Todo < ActiveRecord::Base
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self.table_name = 'todos'
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include EachBatch
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end
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BATCH_SIZE = 1000
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DOWNTIME = false
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disable_ddl_transaction!
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def up
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Todo.where('NOT EXISTS ( SELECT true FROM users WHERE id=todos.user_id )').each_batch(of: BATCH_SIZE) do |batch|
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batch.delete_all
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end
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Todo.where('NOT EXISTS ( SELECT true FROM users WHERE id=todos.author_id )').each_batch(of: BATCH_SIZE) do |batch|
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batch.delete_all
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end
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Todo.where('note_id IS NOT NULL AND NOT EXISTS ( SELECT true FROM notes WHERE id=todos.note_id )').each_batch(of: BATCH_SIZE) do |batch|
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batch.delete_all
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end
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add_concurrent_foreign_key :todos, :users, column: :user_id, on_delete: :cascade
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add_concurrent_foreign_key :todos, :users, column: :author_id, on_delete: :cascade
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add_concurrent_foreign_key :todos, :notes, column: :note_id, on_delete: :cascade
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end
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def down
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remove_foreign_key :todos, column: :user_id
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remove_foreign_key :todos, column: :author_id
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remove_foreign_key :todos, :notes
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end
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end
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