*When I migrate the database, I meet some errors, and errors are following:*
> Operations to perform:
> Synchronize unmigrated apps: staticfiles, messages
> Apply all migrations: admin, contenttypes, api, auth, sessions
> Synchronizing apps without migrations:
> Creating tables...
> Running deferred SQL...
> Installing custom SQL...
> Running migrations:
> Rendering model states... DONE
> Applying api.0004_auto_20151119_1545...Traceback (most recent call last
> ):
> File "manage.py", line 10, in <module>
> execute_from_command_line(sys.argv)
> File
> "/Library/Python/2.7/site-packages/django/core/management/__init__.py",
> line 354, in execute_from_command_line
> utility.execute()
> File
> "/Library/Python/2.7/site-packages/django/core/management/__init__.py",
> line 346, in execute
> self.fetch_command(subcommand).run_from_argv(self.argv)
> File "/Library/Python/2.7/site-packages/django/core/management/base.py",
> line 394, in run_from_argv
> self.execute(*args, **cmd_options)
> File "/Library/Python/2.7/site-packages/django/core/management/base.py",
> line 445, in execute
> output = self.handle(*args, **options)
> File
> "/Library/Python/2.7/site-packages/django/core/management/commands/migrate.py"
> , line 222, in handle
> executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial)
> File
> "/Library/Python/2.7/site-packages/django/db/migrations/executor.py",
> line 110, in migrate
> self.apply_migration(states[migration], migration, fake=fake,
> fake_initial=fake_initial)
> File
> "/Library/Python/2.7/site-packages/django/db/migrations/executor.py",
> line 148, in apply_migration
> state = migration.apply(state, schema_editor)
> File
> "/Library/Python/2.7/site-packages/django/db/migrations/migration.py",
> line 115, in apply
> operation.database_forwards(self.app_label, schema_editor, old_state,
> project_state)
> File
> "/Library/Python/2.7/site-packages/django/db/migrations/operations/fields.py"
> , line 62, in database_forwards
> field,
> File
> "/Library/Python/2.7/site-packages/django/db/backends/sqlite3/schema.py",
> line 179, in add_field
> self._remake_table(model, create_fields=[field])
> File
> "/Library/Python/2.7/site-packages/django/db/backends/sqlite3/schema.py",
> line 77, in _remake_table
> self.effective_default(field)
> File
> "/Library/Python/2.7/site-packages/django/db/backends/base/schema.py",
> line 211, in effective_default
> default = field.get_db_prep_save(default, self.connection)
> File
> "/Library/Python/2.7/site-packages/django/db/models/fields/__init__.py",
> line 710, in get_db_prep_save
> prepared=False)
> File
> "/Library/Python/2.7/site-packages/django/db/models/fields/__init__.py",
> line 1322, in get_db_prep_value
> value = self.get_prep_value(value)
> File
> "/Library/Python/2.7/site-packages/django/db/models/fields/__init__.py",
> line 1317, in get_prep_value
> return self.to_python(value)
> File
> "/Library/Python/2.7/site-packages/django/db/models/fields/__init__.py",
> line 1274, in to_python
> parsed = parse_date(value)
> File "/Library/Python/2.7/site-packages/django/utils/dateparse.py",
> line 60, in parse_date
> match = date_re.match(value)
> TypeError: expected string or buffer
>
> *and the source code of models.py is following:*
>
> from django.db import models
from django.core.exceptions import ValidationError
from django.utils.dateformat import format
from django.contrib.auth.models import AbstractUser
from datetime import date
import datetime
from django.conf import settings
from django.db.models import Sum
from django.utils import timezone
from django.utils.dateformat import format
# Create your models here.
#Users, Contacts, Events
class User(models.Model):
phonenum = models.CharField(max_length=20)
username = models.CharField(max_length=20)
def get_usr_info(self):
data = {} # dictionary
data['phonenum'] = self.phonenum
data['name'] = self.username
return data
class Contacts(models.Model):
user = models.ForeignKey(User)
class UpdateEvents(models.Model):
user = models.ForeignKey(User)
events = models.CharField(max_length=50)
latitude = models.CharField(max_length=10)
longitude = models.CharField(max_length=10)
city = models.CharField(max_length=10)
arriveDate = models.DateTimeField(blank=True, null=True)
leaveDate = models.DateTimeField(blank=True, null=True)
#arriveDate = models.CharField(max_length=15, default="")
#leaveDate = models.CharField(max_length=15, default="")
def get_events_info(self):
data = {}
data['phonenum'] = self.user.phonenum
data['name'] = self.user.username
data['events'] = self.events
data['latitude'] = self.latitude
data['longitude'] = self.longitude
data['city'] = self.city
data['arriveDate'] = format(self.arriveDate, "U")
data['leaveDate'] = format(self.leaveDate, "U")
return data
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