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Corrected problem with MySQL checks handler and related fields.

This commit is contained in:
Russell Keith-Magee 2014-01-21 18:37:49 +08:00
parent 151dae2bea
commit 494b408041
1 changed files with 15 additions and 17 deletions
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32
django/db/backends/mysql/validation.py
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@ -12,23 +12,21 @@ class DatabaseValidation(BaseDatabaseValidation):
from django.db import connection from django.db import connection
errors = super(DatabaseValidation, self).check_field(field, **kwargs) errors = super(DatabaseValidation, self).check_field(field, **kwargs)
try:
field_type = field.db_type(connection)
except AttributeError:
# If the field is a relative field and the target model is
# missing, then field.rel.to is not a model and doesn't have
# `_meta` attribute.
field_type = ''
if (field_type.startswith('varchar') and field.unique # Ignore any related fields.
and (field.max_length is None or int(field.max_length) > 255)): if getattr(field, 'rel', None) is None:
errors.append( field_type = field.db_type(connection)
checks.Error(
('Under mysql backend, the field cannot have a "max_length" ' if (field_type.startswith('varchar') # Look for CharFields...
'greated than 255 when it is unique.'), and field.unique # ... that are unique
hint=None, and (field.max_length is None or int(field.max_length) > 255)):
obj=field, errors.append(
id='E047', checks.Error(
('Under mysql backend, the field cannot have a "max_length" '
'greated than 255 when it is unique.'),
hint=None,
obj=field,
id='E047',
)
) )
)
return errors return errors