如何根据值
conto
更改gruppo_id
字段的选项/选择列表?
conto
是描述为 model.ContoCOGE(MPTTModel)
的树分支的外键。
对于每个 gruppo
都有一棵树,它发展到一定的深度。
如何在所有树中进行过滤,并在 TablularInline
的 TreeNodeChoiceField 中仅列出具有 group_id 的树?
在调试中,重写的 formfield_for_foreignkey(self, db_field, request, **kwargs) 返回正确的树。但浏览器会呈现带有所有树的选择字段的页面。
#model.py
from mptt.models import MPTTModel, TreeForeignKey
from multigroup.models import Gruppo
class ContoCOGE (MPTTModel):
gruppo = models.ForeignKey(Gruppo, on_delete=models.CASCADE,related_name='contoCOCGE_gruppo')
parent = TreeForeignKey('self', on_delete=models.CASCADE, null=True, blank=True, related_name='children')
class PncGen (models.Model):
gruppo = models.ForeignKey(Gruppo, on_delete=models.CASCADE)
#other stuff
class PncRighe (models.Model):
gruppo = models.ForeignKey(Gruppo, on_delete=models.CASCADE)
idPnc = models.ForeignKey(PncGen,on_delete=models.CASCADE) #puntatore alla testata
conto = models.ForeignKey(ContoCOGE,on_delete=models.CASCADE,blank=True, null=True)
#other stuff
#admin.py
from django_mptt_admin.admin import DjangoMpttAdmin
class PncRigheInline(admin.TabularInline):
model = PncRighe
autocomplete_fields = ['partitarioRiga','conto']
extra = 1
def filter_tree_queryset(self, queryset,request):
qs = queryset.filter(gruppo_id=int(request.session['gruppo_utente']))
return qs
def get_changeform_initial_data(self, request):
return {'gruppo': int(request.session['gruppo_utente'])}
def formfield_for_foreignkey(self, db_field, request, **kwargs):
if db_field.name == 'gruppo' or db_field.name == 'idRiga' or db_field.name == 'idPnc':
kwargs['widget'] = forms.HiddenInput()
if db_field.name == 'conto':
db = kwargs.get("using")
qs = self.get_field_queryset(db, db_field, request)
kwargs['queryset']=qs.filter(gruppo_id = request.session['gruppo_utente'] )
@admin.register(PncGen)
class PncGenAdmin(admin.ModelAdmin):
#...
inlines = (PncRigheInline,)
我找到了一个准解决方案。它可以工作,但没有自动完成功能。
def formfield_for_foreignkey(self, db_field, request, **kwargs):
if db_field.name == 'gruppo' or db_field.name == 'idRiga' or db_field.name == 'idPnc':
kwargs['widget'] = forms.HiddenInput()
if db_field.name == 'conto':
db = kwargs.get("using")
qs = self.get_field_queryset(db, db_field, request)
db_field.choices = [ ( p.id, '{0}'.format( str(p)),) for p in qs.filter(gruppo_id = request.session['gruppo_utente']).exclude(parent=None) ]
return super(PncRigheInline,self).formfield_for_foreignkey(db_field, request, **kwargs)