Module: ActiveRecord::ConnectionAdapters::CockroachDB::ReferentialIntegrity

Included in:
ActiveRecord::ConnectionAdapters::CockroachDBAdapter
Defined in:
lib/active_record/connection_adapters/cockroachdb/referential_integrity.rb

Instance Method Summary collapse

Instance Method Details

#check_all_foreign_keys_valid! ⇒ Object

CockroachDB will raise a PG::ForeignKeyViolation when re-enabling referential integrity (e.g: adding a foreign key with invalid data raises). So foreign keys should always be valid for that matter.



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# File 'lib/active_record/connection_adapters/cockroachdb/referential_integrity.rb', line 32

def check_all_foreign_keys_valid!
  true
end

#disable_referential_integrity ⇒ Object 



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# File 'lib/active_record/connection_adapters/cockroachdb/referential_integrity.rb', line 36

def disable_referential_integrity
  if transaction_open? && query_value("SHOW autocommit_before_ddl") == "off"
    begin
      yield
    rescue ActiveRecord::InvalidForeignKey => e
      warn <<-WARNING
WARNING: Rails was not able to disable referential integrity.

This is due to CockroachDB's need of committing transactions
before a schema change occurs. To bypass this, you can set
`autocommit_before_ddl: "on"` in your database configuration.
WARNING
      raise e
    end
  else
    foreign_keys = all_foreign_keys

    remove_foreign_keys(foreign_keys)

    # Prefixes and suffixes are added in add_foreign_key
    # in AR7+ so we need to temporarily disable them here,
    # otherwise prefixes/suffixes will be erroneously added.
    old_prefix = ActiveRecord::Base.table_name_prefix
    old_suffix = ActiveRecord::Base.table_name_suffix

    begin
      yield
    ensure
      ActiveRecord::Base.table_name_prefix = ""
      ActiveRecord::Base.table_name_suffix = ""

      add_foreign_keys(foreign_keys) # Never raises.

      ActiveRecord::Base.table_name_prefix = old_prefix if defined?(old_prefix)
      ActiveRecord::Base.table_name_suffix = old_suffix if defined?(old_suffix)
    end
  end
end