Django管理员从相关模型添加表单显示对象字段

Question

I have following model:

class Company(models.Model):
    company_name = models.CharField(verbose_name="Company", max_length=200)


class Department(models.Model):
    name = models.CharField(verbose_name="Department", max_length=255)
    company = models.ForeignKey(Company, on_delete=models.CASCADE)

class Employee(models.Model):

    external_id = models.CharField(max_length=50, null=True, blank=True)
    name = models.CharField(max_length=100)  
    department = models.ForeignKey(Department, on_delete=models.CASCADE)

I am trying to have my Add employee admin form have besides Department, related selection for Company.

So when i select Company i get choice of its departments.

Currently i get choice of all the departments.

App is heavily admin focused so it would be good to have this functionality.

Answer 1

You can try using django autocomplete light. Here are the docs .

This will give you the functionality to display options in the child filter based on the selection in parent filter with the help of its forward paramater.

Create a form class with custom company field and then forward the field to department filter as:

class EmployeeForm(forms.ModelForm):
    company = forms.ModelChoiceField(queryset=Company.objects.all(), 
                                 widget=autocomplete.ModelSelect2(url='your_company_auto_url'),
                                 required=False)
    department = forms.ModelChoiceField(queryset=Department.objects.all(),
                                    widget=autocomplete.ModelSelect2(url='your_department_auto_url',
                                                                     forward=['company']))

    class Meta:
        model = Employee
        fields = '__all__'

Department View:

class DepartmentAutocomplete(autocomplete.Select2QuerySetView):
    def get_queryset(self):
        if not self.request.user.is_authenticated():
            return Department.objects.none()

        qs = Department.objects.all()

        company = self.forwarded.get('company', None)

        if company:
            qs = qs.filter(company=company)

        if self.q:
            qs = qs.filter(name__istartswith=self.q)
        return qs

This will forward the selected company id and it can then be used in the autocomplete view to filter the department queryset. Please refer to the documentation to create autocomplete views to be used for the fields in the form.

Hope it helps.

Answer 2

IMO，也许您需要将“ Klijent”更改为“ Company”，我想知道“ Klijent”的用途是什么？