0fc9f9d3e7
DB schema generated by a migration may look different in rails 4 and 5 (because rails 5 may use different default values). For this reason it's important to explicitly set for which rails version a migration was written for. See https://stackoverflow.com/questions/35929869/activerecordmigration-deprecation-warning-asks-for-rails-version-but-im-no/35930912#35930912
31 lines
813 B
Ruby
31 lines
813 B
Ruby
# 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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class RemoveRestrictedTodos < ActiveRecord::Migration[4.2]
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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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