如何以Django模型形式显示用户的get_full_name（）而不是用户名？ [英] How to display a user's get_full_name() instead of the username in a Django model form?

问题描述

我有一个引用 ForeignKey（User）字段的模型。

I have a model that references a ForeignKey(User) field.

当用户选择一个项目时在他的表格上，我希望他们能够看到 get_full_name（）而不只是 username 。

When a user selects an item on his form I would like them to be able to see the get_full_name() instead of just the username.

class Books(models.Model):
     author = models.ForeignKey(User)

推荐答案

这可以通过几种方法完成。

This can be done several ways.

创建 User 的代理子类，并覆盖其 __ unicode __（）方法以返回用户的全名。

Create a proxy subclass of User and override its __unicode__() method to return user's full name.

class UserFullName(User):
    class Meta:
        proxy = True

    def __unicode__(self):
        return self.get_full_name()

现在处于模型形式，请使用 UserFullName 来检索用户。

Now in your model form, use UserFullName to retrieve users.

class BookForm(forms.ModelForm):
    author = forms.ModelChoiceField(queryset=UserFullName.objects.all())
    class Meta:
        model = Book

---

另一种方法是在表单的构造函数中动态填充选择。

---

Another way is to dynamically populate choices in form's constructor.

class BookForm(forms.ModelForm):

    def __init__(self, *args, **kwargs):
        super(BookForm, self).__init__(*args, **kwargs)
        users = User.objects.all()
        self.fields['author'].choices = [(user.pk, user.get_full_name()) for user in users]

    class Meta:
        model = Book

---

也许lazerscience展示了最 djangonic的方式作为对类似问题的回答 Django形式：如何动态创建ModelChoiceField标签 。它是 ModelChoiceField 的子类，并覆盖了旨在提供选择标签的 label_from_instance（）方法。

---

Perhaps, the most "djangonic" way is demonstrated by lazerscience as an answer to the similar question Django forms: how to dynamically create ModelChoiceField labels. It subclasses ModelChoiceField and overrides its label_from_instance() method that is intended to provide choice labels.

class UserFullnameChoiceField(forms.ModelChoiceField):
    def label_from_instance(self, obj):
        return smart_unicode(obj.get_full_name())

class BookForm(forms.ModelForm):
    author = UserFullnameChoiceField(queryset=User.objects.all())

    class Meta:
        model = Book

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