Python: Rückgabe int (Wert) ValueError: ungültiges Literal für int() mit Basis 10: ''

Question

Hilfe, ich bekomme immer ValueError: ungültiges Literal für int() mit Basis 10: '' wenn ich versuche, migrieren Modelle. dies ist mein Modell

from django.db import models 
from datetime import date 

class PoliceAssurance(models.Model): 
    numPolice = models.AutoField(primary_key=True) 
    raison = models.CharField(max_length=50) 
    tel = models.CharField(max_length=20) 
    email = models.CharField(max_length=50) 
    interlocuteur = models.CharField(max_length=50) 
    dateDebut = models.CharField(max_length=50) 
    dateFin = models.CharField(max_length=50) 
    tiers = models.CharField(max_length=50) 
    formule = models.CharField(max_length=50) 
    territoire = models.CharField(max_length=50) 
    exclusions = models.CharField(max_length=50) 
    complement = models.CharField(max_length=50) 

dies die Spur

ist

Operations to perform: 
Apply all migrations: sessions, contenttypes, log, admin, auth 
Running migrations: 
Rendering model states... DONE 
Applying log.0003_auto_20170206_1251...Traceback (most recent call last): 
File "manage.py", line 10,in <module> execute_from_command_line(sys.argv) 
File "C:\Python34\lib\site-packages\django\core\management\__init__.py",    line 350, in execute_from_command_line utility.execute() 
File "C:\Python34\lib\site-packages\django\core\management\__init__.py", line 342, in execute self.fetch_command(subcommand).run_from_argv(self.argv) 
File "C:\Python34\lib\site-packages\django\core\management\base.py", line 348, in run_from_argv self.execute(*args, **cmd_options) 
File "C:\Python34\lib\site-packages\django\core\management\base.py", line 399, in execute output = self.handle(*args, **options) File "C:\Python34\lib\site-packages\django\core\management\commands\migrate.py", line 200, in handle executor.migrate(targets,plan, fake=fake,fake_initial=fake_initial) 
File "C:\Python34\lib\site-packages\django\db\migrations\executor.py", line 92, in migrate self._migrate_all_forwards(plan, full_plan, fake=fake, fake_initial=fake_initial) 
File "C:\Python34\lib\site-packages\django\db\migrations\executor.py", line 121, in _migrate_all_forwards state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial) 
File "C:\Python34\lib\site-packages\django\db\migrations\executor.py", line 198, in apply_migration state = migration.apply(state, schema_editor) 
File "C:\Python34\lib\site-packages\django\db\migrations\migration.py", line 123, in apply operation.database_forwards(self.app_label, schema_editor, old_state, project_state) File "C:\Python34\lib\site-packages\django\db\migrations\operations\fields.py", line 62, in database_forwards field, 
File "C:\Python34\lib\site-packages\django\db\backends\base\schema.py", line 382, in add_field definition, params = self.column_sql(model, field, include_default=True) 
File "C:\Python34\lib\site-packages\django\db\backends\base\schema.py", line 145, in column_sql default_value = self.effective_default(field) 
File "C:\Python34\lib\site-packages\django\db\backends\base\schema.py", line 210, in effective_default default = field.get_db_prep_save(default, self.connection) 
File "C:\Python34\lib\site-packages\django\db\models\fields\__init__.py", line 728, in get_db_prep_save prepared=False) 
File "C:\Python34\lib\site-packages\django\db\models\fields\__init__.py", line 968, in get_db_prep_value value = self.get_prep_value(value) 
File "C:\Python34\lib\site-packages\django\db\models\fields\__init__.py", line 976, in get_prep_value  return int(value) 
ValueError: invalid literal for int() with base 10: '' 

Answer 1

mein Problem

i den Migrationen Ordner löschen gelöst wird und ich ausgeführt diese Befehle

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