71 lines
2.4 KiB
Ruby
71 lines
2.4 KiB
Ruby
# frozen_string_literal: true
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class DedupRunnerProjects < Gitlab::Database::Migration[1.0]
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TABLE_NAME = :ci_runner_projects
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TMP_INDEX_NAME = 'tmp_unique_ci_runner_projects_by_runner_id_and_project_id'
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OLD_INDEX_NAME = 'index_ci_runner_projects_on_runner_id_and_project_id'
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INDEX_NAME = 'index_unique_ci_runner_projects_on_runner_id_and_project_id'
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BATCH_SIZE = 5000
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disable_ddl_transaction!
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module Ci
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class RunnerProject < ActiveRecord::Base
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include EachBatch
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self.table_name = 'ci_runner_projects'
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end
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end
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def up
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last_runner_project_record_id = Ci::RunnerProject.maximum(:id) || 0
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# This index will disallow further duplicates while we're deduplicating the data.
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add_concurrent_index(TABLE_NAME, [:runner_id, :project_id], where: "id > #{Integer(last_runner_project_record_id)}", unique: true, name: TMP_INDEX_NAME)
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Ci::RunnerProject.each_batch(of: BATCH_SIZE) do |relation|
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duplicated_runner_projects = Ci::RunnerProject
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.select('COUNT(*)', :runner_id, :project_id)
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.where('(runner_id, project_id) IN (?)', relation.select(:runner_id, :project_id))
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.group(:runner_id, :project_id)
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.having('COUNT(*) > 1')
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duplicated_runner_projects.each do |runner_project|
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deduplicate_item(runner_project)
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end
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end
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add_concurrent_index(TABLE_NAME, [:runner_id, :project_id], unique: true, name: INDEX_NAME)
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remove_concurrent_index_by_name(TABLE_NAME, TMP_INDEX_NAME)
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remove_concurrent_index_by_name(TABLE_NAME, OLD_INDEX_NAME)
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end
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def down
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add_concurrent_index(TABLE_NAME, [:runner_id, :project_id], name: OLD_INDEX_NAME)
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remove_concurrent_index_by_name(TABLE_NAME, TMP_INDEX_NAME)
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remove_concurrent_index_by_name(TABLE_NAME, INDEX_NAME)
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end
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private
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def deduplicate_item(runner_project)
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runner_projects_records = Ci::RunnerProject
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.where(project_id: runner_project.project_id, runner_id: runner_project.runner_id)
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.order(updated_at: :asc)
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.to_a
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attributes = {}
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runner_projects_records.each do |runner_projects_record|
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params = runner_projects_record.attributes.except('id')
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attributes.merge!(params.compact)
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end
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ApplicationRecord.transaction do
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record_to_keep = runner_projects_records.pop
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records_to_delete = runner_projects_records
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Ci::RunnerProject.where(id: records_to_delete.map(&:id)).delete_all
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record_to_keep.update!(attributes)
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end
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end
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end
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