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Cross-database foreign keys do not work

See original GitHub issue

Using the ForeignKeyField inside a model with a rel_model that’s located inside another database than the aforementioned model peewee won’t resolve the related model to its correct database. As a result, tables containing foreign keys with related models of other databases cannot be created:

Traceback (most recent call last):
  File "/usr/lib/python3.4/site-packages/peewee-2.2.4-py3.4.egg/peewee.py", line 2406, in execute_sql
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/cursors.py", line 132, in execute
    result = self._query(query)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/cursors.py", line 271, in _query
    conn.query(q)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 744, in query
    self._affected_rows = self._read_query_result(unbuffered=unbuffered)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 879, in _read_query_result
    result.read()
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 1082, in read
    first_packet = self.connection._read_packet()
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 844, in _read_packet
    packet.check_error()
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 370, in check_error
    raise_mysql_exception(self._data)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/err.py", line 116, in raise_mysql_exception
    _check_mysql_exception(errinfo)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/err.py", line 112, in _check_mysql_exception
    raise InternalError(errno, errorvalue)
pymysql.err.InternalError: (1005, "Can't create table 'realestatedb.realestate' (errno: 150)")

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "./setup.py", line 22, in <module>
    table.create_table(fail_silently=True)
  File "/usr/lib/python3.4/site-packages/peewee-2.2.4-py3.4.egg/peewee.py", line 3078, in create_table
  File "/usr/lib/python3.4/site-packages/peewee-2.2.4-py3.4.egg/peewee.py", line 2471, in create_table
  File "/usr/lib/python3.4/site-packages/peewee-2.2.4-py3.4.egg/peewee.py", line 2414, in execute_sql
  File "/usr/lib/python3.4/site-packages/peewee-2.2.4-py3.4.egg/peewee.py", line 2283, in __exit__
  File "/usr/lib/python3.4/site-packages/peewee-2.2.4-py3.4.egg/peewee.py", line 105, in reraise
  File "/usr/lib/python3.4/site-packages/peewee-2.2.4-py3.4.egg/peewee.py", line 2406, in execute_sql
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/cursors.py", line 132, in execute
    result = self._query(query)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/cursors.py", line 271, in _query
    conn.query(q)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 744, in query
    self._affected_rows = self._read_query_result(unbuffered=unbuffered)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 879, in _read_query_result
    result.read()
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 1082, in read
    first_packet = self.connection._read_packet()
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 844, in _read_packet
    packet.check_error()
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 370, in check_error
    raise_mysql_exception(self._data)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/err.py", line 116, in raise_mysql_exception
    _check_mysql_exception(errinfo)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/err.py", line 112, in _check_mysql_exception
    raise InternalError(errno, errorvalue)
peewee.InternalError: (1005, "Can't create table 'realestatedb.realestate' (errno: 150)")

And, if the databases were then manually created, it cannot assign the correct foreign key fields:

    Traceback (most recent call last):
  File "/usr/lib/python3.4/site-packages/peewee-2.2.4-py3.4.egg/peewee.py", line 2406, in execute_sql
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/cursors.py", line 132, in execute
    result = self._query(query)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/cursors.py", line 271, in _query
    conn.query(q)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 744, in query
    self._affected_rows = self._read_query_result(unbuffered=unbuffered)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 879, in _read_query_result
    result.read()
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 1082, in read
    first_packet = self.connection._read_packet()
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 844, in _read_packet
    packet.check_error()
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 370, in check_error
    raise_mysql_exception(self._data)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/err.py", line 116, in raise_mysql_exception
    _check_mysql_exception(errinfo)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/err.py", line 112, in _check_mysql_exception
    raise InternalError(errno, errorvalue)
pymysql.err.InternalError: (1054, "Unknown column 't1.customer_id' in 'field list'")

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.4/site-packages/peewee-2.2.4-py3.4.egg/peewee.py", line 2139, in __iter__
  File "/usr/lib/python3.4/site-packages/peewee-2.2.4-py3.4.egg/peewee.py", line 2132, in execute
  File "/usr/lib/python3.4/site-packages/peewee-2.2.4-py3.4.egg/peewee.py", line 1838, in _execute
  File "/usr/lib/python3.4/site-packages/peewee-2.2.4-py3.4.egg/peewee.py", line 2414, in execute_sql
  File "/usr/lib/python3.4/site-packages/peewee-2.2.4-py3.4.egg/peewee.py", line 2283, in __exit__
  File "/usr/lib/python3.4/site-packages/peewee-2.2.4-py3.4.egg/peewee.py", line 105, in reraise
  File "/usr/lib/python3.4/site-packages/peewee-2.2.4-py3.4.egg/peewee.py", line 2406, in execute_sql
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/cursors.py", line 132, in execute
    result = self._query(query)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/cursors.py", line 271, in _query
    conn.query(q)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 744, in query
    self._affected_rows = self._read_query_result(unbuffered=unbuffered)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 879, in _read_query_result
    result.read()
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 1082, in read
    first_packet = self.connection._read_packet()
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 844, in _read_packet
    packet.check_error()
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/connections.py", line 370, in check_error
    raise_mysql_exception(self._data)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/err.py", line 116, in raise_mysql_exception
    _check_mysql_exception(errinfo)
  File "/usr/lib/python3.4/site-packages/PyMySQL-0.6.2-py3.4.egg/pymysql/err.py", line 112, in _check_mysql_exception
    raise InternalError(errno, errorvalue)
peewee.InternalError: (1054, "Unknown column 't1.customer_id' in 'field list'")

Issue Analytics

  • State:closed
  • Created 9 years ago
  • Comments:6 (6 by maintainers)

github_iconTop GitHub Comments

1reaction
coleifercommented, Oct 24, 2014

You might try using the schema model option. This is typically reserved for referencing tables that belong to a schema, but it might work for your use-case as well.

class CRMModel(Model):
    """
    Generic HOMEINFO-DB Model
    """
    class Meta:
        database = database
        schema = 'homeinfodb'

# ...


class REDBModel(Model):
    class Meta:
        database = database
        schema = 'realestatedb'
0reactions
coleifercommented, Oct 30, 2014

Please re-open if using schema does not resolve the issue.

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