Question

class Library(forms.ModelForm):

    author = forms.ChoiceField(
        widget = forms.Select(),
        choices = ([
            ('Jk Rowling','Jk Rowling'), 
            ('agatha christie','agatha christie'),
            ('mark twain','mark twain'), 
        ]),
        initial = '1', 
        required = True,
    )
    books = forms.ChoiceField(
        widget = forms.Select(), 
        choices = ([
            ('Harry Potter 1','Harry Potter 1'),  # 1
            ('Harry Potter 2','Harry Potter 2'),  # 2
            ('Harry Potter 3','Harry Potter 3'),  # 3
            ('Harry Potter 4','Harry Potter 4'),  # 4
            ('The A.B.C. Murders','The A.B.C. Murders'),  # 5
            ('Dumb Witness','Dumb Witness'),  # 6
            ('Death on the Nile','Death on the Nile'),  # 7
            ('Murder Is Easy','Murder Is Easy'),  # 8
            ('Roughing It','Roughing It'),  # 9
            (' The Gilded Age ',' The Gilded Age '),  # 10
            ('Adventures of Tom Sawyer','Adventures of Tom Sawyer'),  # 11
        ]),
        initial = '1',
        required = True,
    )

如果用户选择作者作为Jk罗琳，必须在书籍选择栏中填写哈利波特系列（1到4个选项）

如果用户选择作者阿加莎克里斯蒂然后只有（5到8）必须填写书籍选择字段

如果用户选择作者为马克吐温那么只需在书籍选择字段的选择小部件中填充（8到11）选项

我想过滤任何人可以帮忙的选择吗？

Answer 1

将author和books保留在数据库中。

models.py

Class Author(models.Model):
    name = models.CharField(max_length=50)
    ......

class Books(models.Model):
    ....
    author = models.ForeignField(Author)
    ....

Class Library(models.Model):
    .....
    author = models.ForeignKey(Author)
    books = models.ForeignKey(Books)
    .....

forms.py

class Library(forms.ModelForm):

    def __init__(self, *args, **kwargs):
        super(Library, self).__init__(*args, **kwargs)
        self.fields['author'].choices = list(Author.objects.values_list('id', 'name'))

        self.fields['books'].choices = list(Books.objects.values_list('id', 'name'))


    class Meta:
        Model: Library

根据Author选择，从ajax调用触发并获取所有相应的books。

Django Chained如何在Forms.py中选择？

1 个答案: