Django表单Foreignkey字段的初始值

from django import forms
from .models import Book, Author

class BookForm(forms.ModelForm):
    class Meta:
        model = Book
        fields = ['title', 'author']

    def __init__(self, *args, **kwargs):
        initial_author_id = kwargs.pop('initial_author_id', None)
        super(BookForm, self).__init__(*args, **kwargs)
        if initial_author_id:
            self.fields['author'].initial = Author.objects.get(id=initial_author_id)

# 使用表单时传入初始作者ID
form = BookForm(initial_author_id=1)

def __init__(self, *args, **kwargs):
    initial_author_id = kwargs.pop('initial_author_id', None)
    super(BookForm, self).__init__(*args, **kwargs)
    if initial_author_id:
        try:
            self.fields['author'].initial = Author.objects.get(id=initial_author_id)
        except Author.DoesNotExist:
            # 处理异常，例如设置默认值或忽略
            self.fields['author'].initial = None