如何将初始值分配给ModelAdmin中的自定义字段？

Question

我想通过模型中的onetonefield扩展django用户身份验证。这里是模型：

from django.db import models 
from django.contrib.auth.models import User 
from django.db.models.signals import post_save 
from django.dispatch import receiver 


class Profile(models.Model): 
    user = models.OneToOneField(User, on_delete=models.CASCADE) 
    nim = models.CharField(max_length=10, blank=True) 

    def __str__(self): 
     return self.user.username 

随着基本的管理面板，我得到先创建用户实例，然后配置文件。但我用自定义表单管理面板上，所以我可以在一个form.This创建它的形式看：

Profile add form

这是forms.py

from django import forms 
from django.contrib.auth.models import User 

from .models import Profile 


class ProfileForm(forms.ModelForm): 
    username = forms.CharField(required=False, max_length=150) 
    password = forms.CharField(required=False, max_length=50, widget=forms.PasswordInput) 

    class Meta: 
     model = Profile 
     fields = ('username', 'password', 'nim') 

，这是admin.py

from django.contrib import admin 
from django.contrib.auth.models import User 

from .forms import ProfileForm 
from .models import Profile 


class ProfileAdmin(admin.ModelAdmin): 
    form = ProfileForm 

    def save_model(self, request, obj, form, change): 
     username = form.cleaned_data['username'] 
     password = form.cleaned_data['password'] 
     user = User.objects.create_user(username=username, password=password) 
     user.save() 
     obj.user = user 
     obj.save() 


admin.site.register(Profile, ProfileAdmin) 

有了这一切，我可以创建配置文件实例就好了。但是，当我尝试更改/编辑配置文件时，它没有显示用户名和密码字段的初始值，只有nim字段。

empty username and password field

感谢您的帮助

Answer 1

试试这个：

class ProfileAdmin(admin.ModelAdmin): 
    form = ProfileForm 
    # ... 
    def get_form(self, request, obj=None, *args, **kwargs): 
     form = super(ProfileAdmin, self).get_form(request, *args, **kwargs) 
     #find the user via user profile forien key 
     the_user = User.objects.filter(pk=Profile.user.pk) 
     # Initial values 
     form.base_fields['username '].initial = the_user.username 
     return form 

也试试这个，看看DIFF：（场后才超级​​呼叫住）

 form.fields['username '].initial = the_user.username