'PropertyLoader' object has no attribute 'prop'

[Former user]

File "...lib/sqlalchemy/orm/properties.py", line 304, in compare
    return ~sql.exists([1](1), self.prop.mapper.mapped_table, self.prop.primaryjoin)
AttributeError: 'PropertyLoader' object has no attribute 'prop'

Shouldn't this just be self.mapper.mapped_table and self.primaryjoin?

[Former user]

Actually, for that matter, the line needs to be "return ~sql.exists(1, self.primaryjoin)" for it to work.

[Mike Bayer]

yea, bug. whats the use case, calling with_parent(None) ? the short test scripts here are essential to fix the bug since it can't be fixed without a confirming test case added to the unit tests.

[Mike Bayer]

90d38c7407e532462059d2e98cb8d3bab31f7a36. the fix given is correct but is now on just a one-to-many comparison; many-to-one uses the "optimized" compare of just the foreign key against NULL.

[Mike Bayer]

Removing milestone: 0.4.2 (automated comment)