具有特定字段的自定义查询集的 Django ModelForm 实例

Question

我有一个与以下类似的模型:

class Bike(models.Model):
    made_at = models.ForeignKey(Factory)
    added_on = models.DateField(auto_add_now=True)

所有用户可能在多个工厂工作，因此他们的用户文件都有一个 ManyToManyField至 Factory .

现在我想构建一个 ModelForm为 Bike但我想要 made_at列表仅包含当前用户工作的工厂。这个想法是，用户应该能够添加他们已经组装的自行车，并进入制造自行车的工厂。

我怎么做？

Answer 1

您的问题可能是 dupe of this .

S. Lott的 answer有一张票可以解决您的问题。
他回答:

ForeignKey is represented by django.forms.ModelChoiceField, which is a ChoiceField whose choices are a model QuerySet. See the reference for ModelChoiceField.

So, provide a QuerySet to the field's queryset attribute. Depends on how your form is built. If you build an explicit form, you'll have fields named directly.

form.rate.queryset = Rate.objects.filter(company_id=the_company.id) If you take the default ModelForm object, form.fields["rate"].queryset = ...

This is done explicitly in the view. No hacking around.