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Fixed bug when creating multiple motions at once (problem with unique motion identifier). Fixed #3062.

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Norman Jäckel 2017-03-22 22:22:59 +01:00
parent e5028f7ef2
commit ced3f6d697
1 changed files with 29 additions and 7 deletions
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36
openslides/motions/models.py
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@ -1,7 +1,7 @@
from django.conf import settings from django.conf import settings
from django.contrib.contenttypes.fields import GenericRelation from django.contrib.contenttypes.fields import GenericRelation
from django.core.exceptions import ImproperlyConfigured from django.core.exceptions import ImproperlyConfigured
from django.db import models from django.db import IntegrityError, models, transaction
from django.db.models import Max from django.db.models import Max
from django.utils import formats, timezone from django.utils import formats, timezone
from django.utils.translation import ugettext as _ from django.utils.translation import ugettext as _
@ -226,8 +226,21 @@ class Motion(RESTModelMixin, models.Model):
if not self.identifier and isinstance(self.identifier, str): if not self.identifier and isinstance(self.identifier, str):
self.identifier = None self.identifier = None
# Always skip autoupdate. Maybe we run it later in this method. # Try to save the motion until it succeeds with a correct identifier.
super(Motion, self).save(skip_autoupdate=True, *args, **kwargs) while True:
try:
# Always skip autoupdate. Maybe we run it later in this method.
with transaction.atomic():
super(Motion, self).save(skip_autoupdate=True, *args, **kwargs)
except IntegrityError:
# Identifier is already used. Calculate a new one and try again.
self.identifier_number, self.identifier = self.increment_identifier_number(
self.identifier_number,
self._identifier_prefix,
)
else:
# Save was successful. End loop.
break
if 'update_fields' in kwargs: if 'update_fields' in kwargs:
# Do not save the version data if only some motion fields are updated. # Do not save the version data if only some motion fields are updated.
@ -340,17 +353,26 @@ class Motion(RESTModelMixin, models.Model):
prefix = '%s' % self.category.prefix prefix = '%s' % self.category.prefix
else: else:
prefix = '%s ' % self.category.prefix prefix = '%s ' % self.category.prefix
self._identifier_prefix = prefix
# Calculate new identifier. # Calculate new identifier.
number, identifier = self.increment_identifier_number(number, prefix)
# Set identifier and identifier_number.
self.identifier = identifier
self.identifier_number = number
def increment_identifier_number(self, number, prefix):
"""
Helper method. It increments the number until a free identifier
number is found. Returns new number and identifier.
"""
number += 1 number += 1
identifier = '%s%s' % (prefix, self.extend_identifier_number(number)) identifier = '%s%s' % (prefix, self.extend_identifier_number(number))
while Motion.objects.filter(identifier=identifier).exists(): while Motion.objects.filter(identifier=identifier).exists():
number += 1 number += 1
identifier = '%s%s' % (prefix, self.extend_identifier_number(number)) identifier = '%s%s' % (prefix, self.extend_identifier_number(number))
return number, identifier
# Set identifier and identifier_number.
self.identifier = identifier
self.identifier_number = number
def extend_identifier_number(self, number): def extend_identifier_number(self, number):
""" """