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Fixed #18757, #14462, #21565 -- Reworked database-python type conversions

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Complete rework of translating data values from database

Deprecation of SubfieldBase, removal of resolve_columns and
convert_values in favour of a more general converter based approach and
public API Field.from_db_value(). Now works seamlessly with aggregation,
.values() and raw queries.

Thanks to akaariai in particular for extensive advice and inspiration,
also to shaib, manfre and timograham for their reviews.
This commit is contained in:
Marc Tamlyn 2014-08-12 13:08:40 +01:00
parent 89559bcfb0
commit e9103402c0
35 changed files with 443 additions and 521 deletions
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11
tests/field_subclassing/models.py
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@ -2,13 +2,24 @@
Tests for field subclassing.
"""
import warnings
from django.db import models
from django.utils.encoding import force_text
from django.utils.deprecation import RemovedInDjango20Warning
from .fields import Small, SmallField, SmallerField, JSONField
from django.utils.encoding import python_2_unicode_compatible
# Catch warning about subfieldbase -- remove in Django 2.0
warnings.filterwarnings(
'ignore',
'SubfieldBase has been deprecated. Use Field.from_db_value instead.',
RemovedInDjango20Warning
)
@python_2_unicode_compatible
class MyModel(models.Model):
name = models.CharField(max_length=10)