2018-11-18 11:00:15 +05:30
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# See http://doc.gitlab.com/ce/development/migration_style_guide.html
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# for more information on how to write migrations for GitLab.
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# frozen_string_literal: true
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2019-02-15 15:39:39 +05:30
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class RemoveRestrictedTodos < ActiveRecord::Migration[4.2]
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2018-11-18 11:00:15 +05:30
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DOWNTIME = false
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disable_ddl_transaction!
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MIGRATION = 'RemoveRestrictedTodos'.freeze
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BATCH_SIZE = 1000
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DELAY_INTERVAL = 5.minutes.to_i
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class Project < ActiveRecord::Base
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include EachBatch
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self.table_name = 'projects'
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end
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def up
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Project.where('EXISTS (SELECT 1 FROM todos WHERE todos.project_id = projects.id)')
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.each_batch(of: BATCH_SIZE) do |batch, index|
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range = batch.pluck('MIN(id)', 'MAX(id)').first
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BackgroundMigrationWorker.perform_in(index * DELAY_INTERVAL, MIGRATION, range)
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end
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end
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def down
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# nothing to do
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end
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end
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