Django: ForeignKey limit_choices_to a uguale client dell'oggetto corrente

Dato questi due modelli, desidero che il mio URL FK (in ClientKeyword) mostri solo gli URL il cui client è uguale al client corrente di ClientKeyword.Django: ForeignKey limit_choices_to a uguale client dell'oggetto corrente

Cosa devo inserire in limit_choices_to?

In questo momento sembra che questo:

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})

ho potuto fare le migrazioni e Django non l'ha fatto denuncia, ma quando provo ad aggiungere una nuova parola chiave formare l'interfaccia di amministrazione ottengo il seguente traceback:

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'

fonte

2012-11-27 la_f0ka

Questo è un messaggio più vecchio (di mine in realtà), ma penso che sarà farti andare nella giusta direzione: https://groups.google.com/forum/?fromgroups=#!topic/django- users/s9a0J6fKgWs – Brandon

grazie, ma hai finito per utilizzare l'opzione limit_choices_to nei tuoi modelli o l'hai risolto semplicemente scrivendo un modulo personalizzato? Inoltre, ... sai se sarebbe possibile aggiornare l'elenco degli URL a seconda del client che seleziono? (per quando aggiungo invece di modificare) –

Ho inserito la logica di filtraggio in un modulo personalizzato che ho usato in admin. Dovresti essere in grado di fare un filtro selettivo per l'add contro l'aggiornamento in base alla presenza di un 'id' sull'istanza. – Brandon

ancora meglio: il "official" altro modo per farlo è quello di ignorare formfield_for_foreignkey() in classe di amministrazione del vostro modello.

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)

fonte

2014-08-28 04:45:28 Seth

Django: ForeignKey limit_choices_to a uguale client dell'oggetto corrente

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