dblib.update_record: Get connection only if identifiers are ok

Co-authored-by: Leonardo Rochael Almeida <leorochael@gmail.com>

Author: ramalho

25-class-metaprog/persistent/dblib.py

@@ -133,8 +133,8 @@ def fetch_record(table_name, pk):
 
 
 def update_record(table_name, pk, fields):
- con = get_connection()
  check_identifier(table_name)
+ con = get_connection()
  names = ', '.join(fields.keys())
  placeholders = ', '.join(['?'] * len(fields))
  values = tuple(fields.values()) + (pk,)