Python 无法在django中更新用户配置文件图片

我想允许用户上传一个配置文件，并为上传的配置文件更新为用户的新配置文件图片

我在YouTube上找到了一个教程，并在stackoverflow上阅读了一些答案，但仍在努力

这是我在forms.py中的内容：

# edit mentor profile
class MentorProfileForm(forms.ModelForm):
    class Meta:
        model = User
        exclude = ('password',)
    def clean_avatar(self):
        avatar =  self.cleaned_data['avatar']
        try:
            w,h = get_image_dimensions(avatar)
            #validate size
            max_width = max_height = 100
            if w > max_width or h > max_height:
                raise forms.ValidationError(
                    u'Please use an image that is '
                    '%s x %s pixels or smaller.' %(max_width,max_height))
            #validate content type
            main, sub = avatar.content_type.split('/')
            if not (main == 'image' and sub in ['jpeg','pjpeg','gif','png']):
                raise forms.ValidationError(u'Please use a JPEG, '
                                            'GIF or PNG image.')
            #validate file size
            if len(avatar) > (20 * 1024):
                raise forms.ValidationError(
                    u'Image file must not exceed 20k.'
                )
        except AttributeError:
            pass
        return avatar

这里的想法是允许用户只上传一定大小的图片，这样我就不必调整个人资料图片的大小

models.py：

class User(AbstractUser):
    is_student = models.BooleanField(default=False)
    is_teacher = models.BooleanField(default=False)
...
class Mentor(models.Model):
    user = models.OneToOneField(User,on_delete=models.CASCADE,primary_key=True)
    linkedin = models.URLField(max_length=200,null=True,blank=True)
    photo = models.ImageField(null=True,blank=True,upload_to='media')

    def __str__(self):
        return "Profile of user {}".format(self.user.username)

views.py（teachers.py）：

和我的html页面：

<form id="edit-mentor-profile" class="form-horizontal" method="post" enctype="multipart/form-data">
                        {% csrf_token %}
                      <div class="form-group">
                        <label for="photo" class="col-sm-2 control-label">Avatar</label>
                        <div class="col-md-6">
                          <div class="media v-middle">
                            <div class="media-left">
                              <div class="icon-block width-100 bg-grey-100">
                                  <img id="image" style="width:99%;height:99%;">
                              </div>
                            </div>
                            <div class="media-body">
                                <input type="file" id="files" class="btn btn-white btn-sm paper-shadow relative" data-z="0.5" data-hover-z="1" data-animated/>
                            </div>
...

forms.py：

# edit mentor profile
class MentorProfileForm(forms.ModelForm):
    class Meta:
        model = User
        exclude = ('password',)
    def clean_avatar(self):
        avatar =  self.cleaned_data['avatar']
        try:
            w,h = get_image_dimensions(avatar)
            #validate size
            max_width = max_height = 100
            if w > max_width or h > max_height:
                raise forms.ValidationError(
                    u'Please use an image that is '
                    '%s x %s pixels or smaller.' %(max_width,max_height))
            #validate content type
            main, sub = avatar.content_type.split('/')
            if not (main == 'image' and sub in ['jpeg','pjpeg','gif','png']):
                raise forms.ValidationError(u'Please use a JPEG, '
                                            'GIF or PNG image.')
            #validate file size
            if len(avatar) > (20 * 1024):
                raise forms.ValidationError(
                    u'Image file must not exceed 20k.'
                )
        except AttributeError:
            pass
        return avatar

# edit mentor profile
def edit_user(request):
    user = request.user
    # form = MentorProfileForm(instance=user)
    if request.method == 'POST':
        form = UserForm(request.POST, instance=user)
        mentorform = MentorProfileForm(request.POST, request.FILES, instance=user)
        if form.is_valid() and mentorform.is_valid():
            form.save()
            mentorform.save()
            messages.success(request, _('Your profile was successfully updated!'))
            return HttpResponseRedirect('%s' % (reverse('profile')))
        else:
            messages.error(request, _('Please correct the error below.'))
    else:
        form = UserForm(request.POST, instance=user)
        mentorform = MentorProfileForm(request.POST, request.FILES, instance=user)
    return render(request, 'classroom/teachers/app-instructor-profile.html', {'form': form,
                                                                              'mentor_form': mentorform})

编辑照片和个人资料信息的表单：

#basic form
class UserForm(forms.ModelForm):
    class Meta:
        model = User
        fields = ('first_name','last_name','email')

# edit mentor profile
class MentorProfileForm(forms.ModelForm):
    class Meta:
        model = Mentor
        fields = ('photo',)

---

请注意，您必须先保存对象，然后才能将其分配给一对一关系，应用于更新，在

teachers.py

分配化身后保存实例

  <img src="{{ mentorform.photo}}" alt="people" class="img-circle width-80" />

并将文件从请求传递到表单

messages.success(request, _('Your profile was successfully updated!')) NameError: name '_' is not defined

---

谢谢尝试过这个，还是没有上传个人资料图片吗seems@Emm注意我所做的编辑，将文件从请求传递到表单。仍然没有更新

  <img src="{{ mentorform.photo}}" alt="people" class="img-circle width-80" />

messages.success(request, _('Your profile was successfully updated!')) NameError: name '_' is not defined

mentor = user.mentor
mentor.avatar = form.cleaned_data['avatar']
mentor.save()
user.save()

form = MentorProfileForm(request.POST, request.FILES, instance=user)