CODEWITHSUNDEEP
pythondjangodjango-forms
Wagh
Wagh

Reputation: 4306

filter choices for many to many field in modelform django

i want to filter the many to many field in modelform.

class IdealBehaviour(models.Model):
    cbs_role = models.ManyToManyField(CbsRole, null=True, blank=True)
    cbs = models.ForeignKey('cbs.CBS', null=True, blank=True)
    ideal_behaviour = models.CharField(max_length=500, null=True, blank=True)
    Description = models.CharField(max_length=1000, null=True, blank=True)
    created_time = models.DateTimeField(auto_now_add = True,null=True, blank=True)

class StandardWork(models.Model):
    cbs_and_role = models.ManyToManyField('userdata.CbsRole', null=True, blank=True)
    standard_work_number = models.BigIntegerField(null=True, blank=True)
    system_name= models.CharField(max_length=500, null=True, blank=True)
    system_description=models.TextField(null=True, blank=True)
    ideal_behaviour = models.ManyToManyField ('userdata.IdealBehaviour', null=True, blank=True)
    publish = models.BooleanField(default=False)
    created_time = models.DateTimeField(auto_now_add = True,null=True, blank=True)

class TodoListForm(ModelForm):  # used in manage view
    class Meta:
        model = StandardWork
        exclude = ('publish', 'cbs_and_role', 'standard_work_number')
        widgets = {
              'system_description': forms.Textarea(attrs={'rows':3}),
            }

i want to display the choices of ideal_behaviour for the query

cbsobject = CBS.objects.get(id=dat)
idealbehaviour = IdealBehaviour.objects.filter(cbs=cbsobject)

I want to choices for ideal_behaviour in TodoListForm as idealbehaviour only.

How can i query to display ideal-behaviour assosciated with that perticuler cbs only in modelform?

i got the solution 

def __init__(self, *args, **kwargs):
        super(PollForm, self).__init__(*args, **kwargs)
        if self.instance:
            print "printing in form"
            print self.instance.id
            self.fields['ideal_behaviour'].queryset = IdealBehaviour.objects.filter(cbs__exact=self.instance.id)

but i dont how to get the id for cbs. self.instance.id its giving for standardwork id. i want id for cbs. i.e cbsobject i want in form as a instance. after that its working fine.

Upvotes: 2

Views: 1349

Answers (1)

Wagh
Wagh

Reputation: 4306

Got the solution.

I don't know if it is feasible or not, but I put the forms in the views file only so I can get the instance for "cbsobject".

class PollForm(forms.ModelForm): # used in manage view
    class Meta:
        model = StandardWork
        exclude = ('cbs_and_role','publish', 'standard_work_number')
        widgets = {
          'system_description': forms.Textarea(attrs={'rows':3}),
        } 
    def __init__(self, *args, **kwargs):
        super(PollForm, self).__init__(*args, **kwargs)
        if self.instance:
            print "printing in form"
            print self.instance.id
            self.fields['ideal_behaviour'].queryset = IdealBehaviour.objects.filter(cbs__exact=cbsobject)

Upvotes: 4

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