Hi,
i have this model
class Linkmap(models.Model):
vpathid = models.IntegerField(db_column='VPathID') # Field name made
lowercase.
interfacein = models.CharField(max_length=20L, db_column='InterfaceIn')
# Field name made lowercase.
#Every Link belongs to a LinkMap
#links = models.ForeignKey(Links)
interfaceout = models.CharField(max_length=20L,
db_column='InterfaceOut') # Field name made lowercase.
#Every Vpath composes a LinkMap
vpaths = models.ForeignKey(Vpaths)
hopcounter = models.BigIntegerField(null=True, db_column='HopCounter',
blank=True) # Field name made lowercase.
def __unicode__(self):
return 'VPathID %s , HopCounter %s' %
(self.vpathid,self.hopcounter)
class Meta:
db_table = 'LinkMap'
when i uncommented links = models.ForeignKey(Links)
and tried to migrate i got this exeption:
root@Roronoa:/home/roronoa/Desktop/webinterface/mysite# ./manage.py migrate
myapp
Running migrations for myapp:
- Migrating forwards to 0048_auto__add_field_linkmap_links.
> myapp:0048_auto__add_field_linkmap_links
FailedDryRun: ! Error found during dry run of
'0048_auto__add_field_linkmap_links'! Aborting.
Traceback (most recent call last):
File
"/usr/local/lib/python2.7/dist-packages/South-0.7.6-py2.7.egg/south/migration/migrators.py",
line 175, in _run_migration
migration_function()
File
"/usr/local/lib/python2.7/dist-packages/South-0.7.6-py2.7.egg/south/migration/migrators.py",
line 57, in <lambda>
return (lambda: direction(orm))
File
"/home/roronoa/Desktop/webinterface/mysite/myapp/migrations/0048_auto__add_field_linkmap_links.py",
line 14, in forwards
keep_default=False)
File
"/usr/local/lib/python2.7/dist-packages/South-0.7.6-py2.7.egg/south/db/generic.py",
line 44, in _cache_clear
return func(self, table, *args, **opts)
File
"/usr/local/lib/python2.7/dist-packages/South-0.7.6-py2.7.egg/south/db/generic.py",
line 402, in add_column
sql = self.column_sql(table_name, name, field)
File
"/usr/local/lib/python2.7/dist-packages/South-0.7.6-py2.7.egg/south/db/generic.py",
line 688, in column_sql
default = field.get_db_prep_save(default,
connection=self._get_connection())
File
"/usr/local/lib/python2.7/dist-packages/django/db/models/fields/related.py",
line 1047, in get_db_prep_save
connection=connection)
File
"/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py",
line 304, in get_db_prep_save
prepared=False)
File
"/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py",
line 549, in get_db_prep_value
value = connection.ops.validate_autopk_value(value)
File
"/usr/local/lib/python2.7/dist-packages/django/db/backends/mysql/base.py",
line 288, in validate_autopk_value
raise ValueError('The database backend does not accept 0 as a '
ValueError: The database backend does not accept 0 as a value for AutoField.
I can't do nothing as many tries i did!I not that experienced in South and
Django,just started to use them!Any help would be appriciated!
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