80 lines
2.6 KiB
Ruby
80 lines
2.6 KiB
Ruby
# we need to run seed_fu every time we run rake db:migrate
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task 'db:migrate' => 'environment' do
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SeedFu.seed
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end
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task 'test:prepare' => 'environment' do
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SeedFu.seed
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end
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desc 'Rebuild indexes'
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task 'db:rebuild_indexes' => 'environment' do
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if Import::backup_tables_count > 0
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raise "Backup from a previous import exists. Drop them before running this job with rake import:remove_backup, or move them to another schema."
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end
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Discourse.enable_readonly_mode
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backup_schema = Jobs::Importer::BACKUP_SCHEMA
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table_names = User.exec_sql("select table_name from information_schema.tables where table_schema = 'public'").map do |row|
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row['table_name']
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end
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begin
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# Move all tables to the backup schema:
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User.exec_sql("DROP SCHEMA IF EXISTS #{backup_schema} CASCADE")
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User.exec_sql("CREATE SCHEMA #{backup_schema}")
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table_names.each do |table_name|
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User.exec_sql("ALTER TABLE public.#{table_name} SET SCHEMA #{backup_schema}")
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end
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# Create a new empty db
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Rake::Task["db:migrate"].invoke
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# Fetch index definitions from the new db
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index_definitions = {}
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table_names.each do |table_name|
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index_definitions[table_name] = User.exec_sql("SELECT indexdef FROM pg_indexes WHERE tablename = '#{table_name}' and schemaname = 'public';").map { |x| x['indexdef'] }
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end
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# Drop the new tables
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table_names.each do |table_name|
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User.exec_sql("DROP TABLE public.#{table_name}")
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end
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# Move the old tables back to the public schema
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table_names.each do |table_name|
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User.exec_sql("ALTER TABLE #{backup_schema}.#{table_name} SET SCHEMA public")
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end
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# Drop their indexes
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index_names = User.exec_sql("SELECT indexname FROM pg_indexes WHERE schemaname = 'public' AND tablename IN ('#{table_names.join("', '")}')").map { |x| x['indexname'] }
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index_names.each do |index_name|
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begin
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puts index_name
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User.exec_sql("DROP INDEX public.#{index_name}")
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rescue ActiveRecord::StatementInvalid => e
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# It's this:
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# PG::Error: ERROR: cannot drop index category_users_pkey because constraint category_users_pkey on table category_users requires it
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# HINT: You can drop constraint category_users_pkey on table category_users instead.
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end
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end
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# Create the indexes
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table_names.each do |table_name|
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index_definitions[table_name].each do |index_def|
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begin
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User.exec_sql(index_def)
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rescue ActiveRecord::StatementInvalid => e
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# Trying to recreate a primary key
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end
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end
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end
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rescue
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# Can we roll this back?
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raise
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ensure
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Discourse.disable_readonly_mode
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end
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end
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