CODEWITHSUNDEEP
djangovalidationdjango-modelsdjango-forms
user1121487
user1121487

Reputation: 2680

Django, reference to model object from forms.py

I want to custom validate a Page object. A Project has many Page's. To validate the Page object I need to get a reference to the Project object through its pk in Page.

Need to compare start_date field in Project to start_date field in Page:

class PageForm(ModelForm):
    class Meta:
        model = Page

    def clean_start_date(self):
        # need to get "page.project.start_date" somehow.

Upvotes: 0

Views: 569

Answers (1)

Pavel Anossov
Pavel Anossov

Reputation: 62908

Use the instance property:

class PageForm(ModelForm):
    class Meta:
        model = Page

    def clean_start_date(self):
        project_start_date = self.instance.project.start_date

Upvotes: 4

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