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BlobField cannot be used with uninitialized Proxy

See original GitHub issue

BlobField determines its binary type on its initialization. BlobField then cannot be used with Proxied database that is not initialized. An AttributeError is risen right after module execution/import.

Reproducer:

import peewee

class NonWorkingBlobFieldOnProxy(peewee.Model):
    class Meta:
        database = peewee.Proxy()
    myblob = peewee.BlobField()

Raises:

Traceback (most recent call last):
  File "proxy_example.py", line 3, in <module>
    class NonWorkingBlobFieldOnProxy(peewee.Model):
  File "venv/lib/python2.7/site-packages/peewee.py", line 4479, in __new__
    field.add_to_class(cls, name)
  File "venv/lib/python2.7/site-packages/peewee.py", line 1081, in add_to_class
    self._constructor = model_class._meta.database.get_binary_type()
  File "venv/lib/python2.7/site-packages/peewee.py", line 407, in __getattr__
    raise AttributeError('Cannot use uninitialized Proxy.')
AttributeError: Cannot use uninitialized Proxy.

This affects version 2.8.1. In later versions (2.6.X) this problem did not occur. Commit that introduced this regression: b32e967e

Issue Analytics

State:
Created 7 years ago
Comments:5 (3 by maintainers)

Top GitHub Comments

3reactions

coleifercommented, May 11, 2016

The proxy should have a way to attach callbacks if I remember correctly, so I just need to move the binary type binding to a hook. I’ll fix it regardless, but glad you’re not blocked at the moment.

0reactions

coleifercommented, Jan 6, 2022

@josiahlaivins - see 13e05a3 for fix.

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