Fix postgres_ext and mysql_ext to respect autoconnect settig.

Fixes #2019

CHANGELOG.md

@@ -36,6 +36,8 @@ https://github.com/coleifer/peewee/releases
 * Extend the mysql `ReconnectMixin` helper to work with mysql-connector.
 * Fix mapping of double-precision float in postgres schema reflection.
   Previously it mapped to single-precision, now it correctly uses a double.
+* Fix issue where `PostgresqlExtDatabase` and `MySQLConnectorDatabase` did not
+  respect the `autoconnect` setting.
 
 [View commits](https://github.com/coleifer/peewee/compare/3.10.0...master)
 

playhouse/mysql_ext.py

@@ -21,7 +21,10 @@ def _connect(self):
 
     def cursor(self, commit=None):
         if self.is_closed():
-            self.connect()
+            if self.autoconnect:
+                self.connect()
+            else:
+                raise InterfaceError('Error, database connection not opened.')
         return self._state.conn.cursor(buffered=True)
 
 

playhouse/postgres_ext.py

@@ -452,7 +452,10 @@ def _connect(self):
 
     def cursor(self, commit=None):
         if self.is_closed():
-            self.connect()
+            if self.autoconnect:
+                self.connect()
+            else:
+                raise InterfaceError('Error, database connection not opened.')
         if commit is __named_cursor__:
             return self._state.conn.cursor(name=str(uuid.uuid1()))
         return self._state.conn.cursor()