diff options
Diffstat (limited to 'activerecord/lib/active_record/connection_adapters/postgresql/referential_integrity.rb')
-rw-r--r-- | activerecord/lib/active_record/connection_adapters/postgresql/referential_integrity.rb | 47 |
1 files changed, 43 insertions, 4 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/referential_integrity.rb b/activerecord/lib/active_record/connection_adapters/postgresql/referential_integrity.rb index 44a7338bf5..730e7c7137 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/referential_integrity.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/referential_integrity.rb @@ -6,8 +6,50 @@ module ActiveRecord true end - def disable_referential_integrity # :nodoc: + def disable_referential_integrity(&block) # :nodoc: if supports_disable_referential_integrity? + if supports_alter_constraint? + disable_referential_integrity_with_alter_constraint(&block) + else + disable_referential_integrity_with_disable_trigger(&block) + end + else + yield + end + end + + private + + def disable_referential_integrity_with_alter_constraint + tables_constraints = execute(<<-SQL).values + SELECT table_name, constraint_name + FROM information_schema.table_constraints + WHERE constraint_type = 'FOREIGN KEY' + AND is_deferrable = 'NO' + SQL + + execute( + tables_constraints.collect { |table, constraint| + "ALTER TABLE #{quote_table_name(table)} ALTER CONSTRAINT #{constraint} DEFERRABLE" + }.join(";") + ) + + begin + transaction do + execute("SET CONSTRAINTS ALL DEFERRED") + + yield + end + ensure + execute( + tables_constraints.collect { |table, constraint| + "ALTER TABLE #{quote_table_name(table)} ALTER CONSTRAINT #{constraint} NOT DEFERRABLE" + }.join(";") + ) + end + end + + def disable_referential_integrity_with_disable_trigger original_exception = nil begin @@ -39,10 +81,7 @@ Rails needs superuser privileges to disable referential integrity. end rescue ActiveRecord::ActiveRecordError end - else - yield end - end end end end |