Django的用户从网页保存模型时，请填充用户名或ID

问题描述

我的 UserImg 模型具有一个 user 字段，该字段具有 editable = False 。

我希望在从网页保存用户时用用户名自动填写此字段。

model.py

def upload_myimg_path(instance,filename):
    return 'documents/{0}/{1}'.format(instance.created_by.username,filename)

class UserImg(models.Model):
    user = models.ForeignKey(User,verbose_name=_('Created by'),on_delete=models.CASCADE,editable=False,null=True,blank=True)
    name = models.CharField(max_length=100,default='')
    image = models.ImageField(upload_to=upload_myimg_path,verbose_name=_('File'))

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

forms.py

class UserImgForm(forms.ModelForm):
    class Meta:
        model = UserImg
        fields = '__all__'

views.py

def createuserimg(request):
    if request.method == 'POST':
        form = UserImgForm(request.POST or None)
        if form.is_valid():
            form.save()
            return redirect('/accounts/users')
        else:
            return redirect('/accounts/')
    else:
        form = UserImgForm
        return render(request,'accounts/user_form.html',{'form': form})

解决方法

更新您的视图功能以包括当前登录的用户并使用@login_required装饰器以确保只有登录的用户才能访问此视图：

from django.contrib.auth.decorators import login_required

@login_required
def createuserimg(request):
    if request.method == 'POST':
        form = UserImgForm(request.POST,request.FILES)
        if form.is_valid():
            obj = form.save(commit=False) # <-- commit=False does not save to database
            obj.user = request.user # <-- this allows you to specify the user for your post
            obj.save() 
            return redirect('/accounts/users')
        # if the form did not validated,stay on the same page to display errors to your user
    else:
        form = UserImgForm()
    return render(request,'accounts/user_form.html',{'form': form})

,

正确答案 commit = False允许您在实际将结果对象保存到数据库之前对其进行修改。它对我有用。 非常感谢您的帮助

from django.contrib.auth.decorators import login_required

@login_required
def createuserimg(request):
    if request.method == 'POST':
        form = UserImgForm(request.POST,request.FILES)
        if form.is_valid():
            link = form.save(commit=False)
            link.user = request.user
            link.save()
            return redirect('/accounts/users')
        # if the form did not validated,{'form': form})