Fixed #3265 -- Made it a validation error to have field names with trailing

underscores. Allowing these would enable peopleto write ambiguous queryset
filters (plus makes parsing filters much harder).


git-svn-id: http://code.djangoproject.com/svn/django/trunk@6590 bcc190cf-cafb-0310-a4f2-bffc1f526a37

2 files changed, 6 insertions, 2 deletions

diff --git a/django/core/management/validation.py b/django/core/management/validation.py
index 9e004d3d25..c433b7fa96 100644
--- a/django/core/management/validation.py
+++ b/django/core/management/validation.py
@@ -35,6 +35,8 @@ def get_validation_errors(outfile, app=None):
         for f in opts.fields:
             if f.name == 'id' and not f.primary_key and opts.pk.name == 'id':
                 e.add(opts, '"%s": You can\'t use "id" as a field name, because each model automatically gets an "id" field if none of the fields have primary_key=True. You need to either remove/rename your "id" field or add primary_key=True to a field.' % f.name)
+            if f.name.endswith('_'):
+                e.add(opts, '"%s": Field names cannot end with underscores, because this would lead to ambiguous queryset filters.' % f.name)
             if isinstance(f, models.CharField) and f.max_length in (None, 0):
                 e.add(opts, '"%s": CharFields require a "max_length" attribute.' % f.name)
             if isinstance(f, models.DecimalField):
diff --git a/tests/modeltests/invalid_models/models.py b/tests/modeltests/invalid_models/models.py
index 1afe660dd0..b746af6dba 100644
--- a/tests/modeltests/invalid_models/models.py
+++ b/tests/modeltests/invalid_models/models.py
@@ -14,6 +14,7 @@ class FieldErrors(models.Model):
     choices = models.CharField(max_length=10, choices='bad')
     choices2 = models.CharField(max_length=10, choices=[(1,2,3),(1,2,3)])
     index = models.CharField(max_length=10, db_index='bad')
+    field_ = models.CharField(max_length=10)
 
 class Target(models.Model):
     tgt_safe = models.CharField(max_length=10)
@@ -47,7 +48,7 @@ class Target2(models.Model):
 
 class Clash3(models.Model):
     src_safe = models.CharField(max_length=10, core=True)
-    
+
     foreign_1 = models.ForeignKey(Target2, related_name='foreign_tgt')
     foreign_2 = models.ForeignKey(Target2, related_name='m2m_tgt')
 
@@ -76,7 +77,7 @@ class ValidM2M(models.Model):
     # on self don't require a related accessor, so many potential
     # clashes are avoided.
     validm2m_set = models.ManyToManyField("ValidM2M")
-    
+
     m2m_1 = models.ManyToManyField("ValidM2M", related_name='id')
     m2m_2 = models.ManyToManyField("ValidM2M", related_name='src_safe')
 
@@ -116,6 +117,7 @@ invalid_models.fielderrors: "choices": "choices" should be iterable (e.g., a tup
 invalid_models.fielderrors: "choices2": "choices" should be a sequence of two-tuples.
 invalid_models.fielderrors: "choices2": "choices" should be a sequence of two-tuples.
 invalid_models.fielderrors: "index": "db_index" should be either None, True or False.
+invalid_models.fielderrors: "field_": Field names cannot end with underscores, because this would lead to ambiguous queryset filters.
 invalid_models.clash1: Accessor for field 'foreign' clashes with field 'Target.clash1_set'. Add a related_name argument to the definition for 'foreign'.
 invalid_models.clash1: Accessor for field 'foreign' clashes with related m2m field 'Target.clash1_set'. Add a related_name argument to the definition for 'foreign'.
 invalid_models.clash1: Reverse query name for field 'foreign' clashes with field 'Target.clash1'. Add a related_name argument to the definition for 'foreign'.