I really struggling with my understanding of the following issue and how to
resolve
----------------------------------------
When I try and save (using the Django standard admin interface) I get the
following error...
TypeError at /admin/web/campaign/dc6eb21f-87fa-462f-88af-416cf6be37f6/
>
> get_db_prep_value() got an unexpected keyword argument 'connection'
>
Could someone explain this to me, why and maybe a possible solution? I'm
assuming it is something to do with my custom HibernateBooleanField field.
Full error and details below.
**Error**
Environment:
>
>
> Request Method: POST
> Request URL:
> http://127.0.0.1:8000/admin/web/campaign/dc6eb21f-87fa-462f-88af-416cf6be37f6/
>
> Django Version: 1.4.2
> Python Version: 2.7.2
> Installed Applications:
> ('django.contrib.auth',
> 'django.contrib.contenttypes',
> 'django.contrib.sessions',
> 'django.contrib.sites',
> 'django.contrib.flatpages',
> 'django.contrib.messages',
> 'django.contrib.staticfiles',
> 'grappelli.dashboard',
> 'grappelli',
> 'django.contrib.admin',
> 'django.contrib.admindocs',
> 'web')
> Installed Middleware:
> ('django.middleware.common.CommonMiddleware',
> 'django.contrib.sessions.middleware.SessionMiddleware',
> 'django.middleware.csrf.CsrfViewMiddleware',
> 'django.contrib.auth.middleware.AuthenticationMiddleware',
> 'django.contrib.messages.middleware.MessageMiddleware')
>
>
> Traceback:
> File "/Library/Python/2.7/site-packages/django/core/handlers/base.py"
> in get_response
> 111. response = callback(request,
> *callback_args, **callback_kwargs)
> File
> "/Library/Python/2.7/site-packages/django/contrib/admin/options.py" in
> wrapper
> 366. return self.admin_site.admin_view(view)(*args,
> **kwargs)
> File "/Library/Python/2.7/site-packages/django/utils/decorators.py" in
> _wrapped_view
> 91. response = view_func(request, *args,
> **kwargs)
> File
> "/Library/Python/2.7/site-packages/django/views/decorators/cache.py" in
> _wrapped_view_func
> 89. response = view_func(request, *args, **kwargs)
> File "/Library/Python/2.7/site-packages/django/contrib/admin/sites.py"
> in inner
> 196. return view(request, *args, **kwargs)
> File "/Library/Python/2.7/site-packages/django/utils/decorators.py" in
> _wrapper
> 25. return bound_func(*args, **kwargs)
> File "/Library/Python/2.7/site-packages/django/utils/decorators.py" in
> _wrapped_view
> 91. response = view_func(request, *args,
> **kwargs)
> File "/Library/Python/2.7/site-packages/django/utils/decorators.py" in
> bound_func
> 21. return func(self, *args2, **kwargs2)
> File "/Library/Python/2.7/site-packages/django/db/transaction.py" in
> inner
> 209. return func(*args, **kwargs)
> File
> "/Library/Python/2.7/site-packages/django/contrib/admin/options.py" in
> change_view
> 1054. self.save_model(request, new_object, form,
> True)
> File
> "/Library/Python/2.7/site-packages/django/contrib/admin/options.py" in
> save_model
> 709. obj.save()
> File "/Library/Python/2.7/site-packages/django/db/models/base.py" in
> save
> 463. self.save_base(using=using, force_insert=force_insert,
> force_update=force_update)
> File "/Library/Python/2.7/site-packages/django/db/models/base.py" in
> save_base
> 529. rows =
> manager.using(using).filter(pk=pk_val)._update(values)
> File "/Library/Python/2.7/site-packages/django/db/models/query.py" in
> _update
> 560. return query.get_compiler(self.db).execute_sql(None)
> File
> "/Library/Python/2.7/site-packages/django/db/models/sql/compiler.py" in
> execute_sql
> 986. cursor = super(SQLUpdateCompiler,
> self).execute_sql(result_type)
> File
> "/Library/Python/2.7/site-packages/django/db/models/sql/compiler.py" in
> execute_sql
> 808. sql, params = self.as_sql()
> File
> "/Library/Python/2.7/site-packages/django/db/models/sql/compiler.py" in
> as_sql
> 951. val = field.get_db_prep_save(val,
> connection=self.connection)
> File
> "/Library/Python/2.7/site-packages/django/db/models/fields/__init__.py" in
> get_db_prep_save
> 292. prepared=False)
>
> Exception Type: TypeError at
> /admin/web/campaign/dc6eb21f-87fa-462f-88af-416cf6be37f6/
> Exception Value: get_db_prep_value() got an unexpected keyword
> argument 'connection'
>
>
>
> **model**
>
> class Campaign(models.Model):
> campaignid = models.CharField(max_length=255, primary_key=True,
> db_column='campaignID')
> name = models.CharField(max_length=105)
> active = HibernateBooleanField(default=False)
> created = models.DateTimeField()
> modified = models.DateTimeField(null=True, blank=True)
> companyid = models.ForeignKey(Company, null=True,
> db_column='companyID', blank=True)
>
> class Meta:
> db_table = u'campaign'
>
>
> def __unicode__(self):
> return self.name
>
> class HibernateBooleanField(models.BooleanField):
>
> __metaclass__ = models.SubfieldBase
>
> def get_internal_type(self):
> return "HibernateBooleanField"
>
> def db_type(self):
> return 'bit(1)'
>
> def to_python(self, value):
> if value in (True, False): return value
> if value in ('t', 'True', '1', '\x01'): return True
> if value in ('f', 'False', '0', '\x00'): return False
>
> def get_db_prep_value(self, value):
> return 0x01 if value else 0x00
>
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