Django: ForeignKey limit_choices_to geçerli nesnenin istemcisine eşit

Question

Bu iki model verildiğinde, URL'm (ClientKeyword içinde) yalnızca istemciyi geçerli ClientKeyword istemcisine eşit olan URL'leri göstermesini istiyorum.

Ne yazmalıyım limit_choices_to?

Artık o şuna benzer:

class ClientUrl(models.Model): 
    client = models.ForeignKey(UpstreamClientModel) 
    url = models.URLField(unique=True, null=False) 
    active = models.BooleanField(default=True) 

def __unicode__(self): 
    return self.url 

class Meta: 
    verbose_name = 'url' 


KEYWORD_TYPES = (
    ('MN', 'Money'), 
    ('BR', 'Brand'), 
    ('LT', 'Long Tail'), 
) 

class ClientKeyword(models.Model): 
    client = models.ForeignKey(UpstreamClientModel) 
    kw_type = models.CharField("keyword type", max_length=2, 
       choices=KEYWORD_TYPES, default='LT') 
    keyword = models.CharField(max_length=150, unique=True) 
    # TODO: keyword parent ManyToManyField("self") 
    url = models.ForeignKey(ClientUrl, limit_choices_to={'client': client}) 

Ben göçler yapabileceğini ve django şikayeti yoktu, ama ben eklemeye çalıştığınızda yeni bir anahtar kelime aşağıdaki Traceback olsun yönetici arayüzü oluşturur:

File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response 
    111.       response = callback(request, *callback_args, **callback_kwargs) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/contrib/admin/options.py" in wrapper 
    366.     return self.admin_site.admin_view(view)(*args, **kwargs) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapped_view 
    91.      response = view_func(request, *args, **kwargs) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/views/decorators/cache.py" in _wrapped_view_func 
    89.   response = view_func(request, *args, **kwargs) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/contrib/admin/sites.py" in inner 
    196.    return view(request, *args, **kwargs) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapper 
    25.    return bound_func(*args, **kwargs) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapped_view 
    91.      response = view_func(request, *args, **kwargs) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/utils/decorators.py" in bound_func 
    21.     return func(self, *args2, **kwargs2) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/db/transaction.py" in inner 
    209.     return func(*args, **kwargs) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/contrib/admin/options.py" in add_view 
    932.   ModelForm = self.get_form(request) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/contrib/admin/options.py" in get_form 
    459.   return modelform_factory(self.model, **defaults) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/forms/models.py" in modelform_factory 
    407.  return form_metaclass(class_name, (form,), form_class_attrs) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/forms/models.py" in __new__ 
    206.          opts.exclude, opts.widgets, formfield_callback) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/forms/models.py" in fields_for_model 
    164.    formfield = formfield_callback(f, **kwargs) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/contrib/admin/options.py" in formfield_for_dbfield 
    107.     formfield = self.formfield_for_foreignkey(db_field, request, **kwargs) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/contrib/admin/options.py" in formfield_for_foreignkey 
    168.   return db_field.formfield(**kwargs) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/db/models/fields/related.py" in formfield 
    1005.    'queryset': self.rel.to._default_manager.using(db).complex_filter(self.rel.limit_choices_to), 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/db/models/query.py" in complex_filter 
    660.    return self._filter_or_exclude(None, **filter_obj) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/db/models/query.py" in _filter_or_exclude 
    642.    clone.query.add_q(Q(*args, **kwargs)) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/db/models/sql/query.py" in add_q 
    1250.        can_reuse=used_aliases, force_having=force_having) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/db/models/sql/query.py" in add_filter 
    1185.     connector) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/db/models/sql/where.py" in add 
    69.    value = obj.prepare(lookup_type, value) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/db/models/sql/where.py" in prepare 
    320.    return self.field.get_prep_lookup(lookup_type, value) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/db/models/fields/related.py" in get_prep_lookup 
    137.    return self._pk_trace(value, 'get_prep_lookup', lookup_type) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/db/models/fields/related.py" in _pk_trace 
    210.   v = getattr(field, prep_func)(lookup_type, v, **kwargs) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/db/models/fields/__init__.py" in get_prep_lookup 
    310.    return self.get_prep_value(value) 
File "/Users/mirkocrocop/.virtualenvs/upstream_backend/lib/python2.7/site-packages/django/db/models/fields/__init__.py" in get_prep_value 
    537.   return int(value) 

Exception Type: TypeError at /admin/clients/clientkeyword/add/ 
Exception Value: int() argument must be a string or a number, not 'ForeignKey' 

Answer 1

daha da iyisi: bunu yapmak için daha fazla "official" yolu modelin yönetici sınıfında formfield_for_foreignkey() geçersiz etmektir.

class ClientKeywordAdmin(admin.ModelAdmin): 
    def get_form(self, request, obj=None, **kwargs): 
     # store the model instance for later 
     request.obj = obj 
     return super(ClientKeywordAdmin, self).get_form(request, obj, 
                 **kwargs) 

    def formfield_for_foreignkey(self, db_field, request=None, **kwargs): 
     if db_field.name == 'url': 
      # set the query set to whatever you like 
      kwargs['queryset'] = request._obj.client.clienturls.all() 
     return super(ClientKeywordAdmin, 
        self).formfield_for_foreignkey(request, obj, **kwargs)