Django图片上传问题

Question

我正在尝试上传图片。这是用户个人资料的头像图片。

目前，表单没有返回错误，但我的数据库或我的文件夹media/avatar /上没有写入任何内容。

怎么了？

我的观点：

def view_avatar(request): 
    if request.method == 'POST': 
     form = UploadFileForm(request.POST, request.FILES, instance=request.user.profile) 
     if form.is_valid(): 
      form.save()    
    else: 
     form = UploadFileForm(instance=request.user.profile) 
    return render(request, 'avatar.html', locals()) 

我的形式：

class UploadFileForm(forms.ModelForm): 
    class Meta: 
     model = Profile 
     fields = ('avatar',) 

我的模型：

class Profile(models.Model): 
    user = models.OneToOneField(User, on_delete=models.CASCADE) 
    birthdate = models.DateField(null=True, blank=True) 
    avatar = models.ImageField(upload_to='media/avatar/', blank=True, null=True) 

Answer 1

我忘了ENCTYPE！ 解决方案是：

<form method="POST" action="" enctype="multipart/form-data"> 

Answer 2

，那是因为它使用的是从forms.Form继承的形式，你需要请使用forms.ModelForm直接保存实例。

改变这一行，

class UploadFileForm(forms.ModelForm): 
    class Meta: 
     model = Profile 
     fields = ('avatar',) 

    def save(self, *args, **kwargs): 
     profile, created = Profile.objects.get_or_create(user=self.user) 
     profile.avatar = self.cleaned_data['avatar'] 
     profile.save() 
     return profile 

此外，编辑您的看法是这样，

if form.is_valid(): 
    file = form.save(commit=False) 
    file.user = request.user 
    file.save() 

Answer 3

您可以编写自定义保存方法，这是这样的。

查看：

def view_avatar(request): 
    if request.method == 'POST': 
     form = UploadFileForm(request.POST, request.FILES, user=request.user) 
     if form.is_valid(): 
      form.save() 

    else: 
     form = UploadFileForm() 
    return render(request, 'avatar.html', locals()) 

表：

class UploadFileForm(forms.Form): 
    class Meta: 
     model = Profile 
     fields = ('avatar',) 

    def __init__(self, *args, **kwargs): 
     self.user = kwargs.pop('user', None) 
     super(UploadFileForm, self).__init__(*args, **kwargs) 
     self.fields['avatar'].required = False 

    avatar = forms.FileField() 


    def save(self, *args, **kwargs): 
     user_profile, created = Profile.objects.get_or_create(user=self.user) 
     user_profile.avatar = self.cleaned_data.get('avatar') 
     user_profile.save() 
     return user_profile 

Answer 4

为了使您可以使用信号的轮廓。

这样，无论何时添加了一个新的用户，将为该用户生成的配置文件自动

你models.py：

from django.conf import settings 
from django.db.models.signals import post_save 


class Profile(models.Model): 
    user = models.OneToOneField(settings.AUTH_USER_MODEL) 
    birthdate = models.DateField(null=True, blank=True) 
    avatar = models.ImageField(upload_to='media/avatar/%y/%m/%d', blank=True, null=True) 


def post_save_profile(sender, instance, created, *args, **kwargs): 
    if created: 
     try: 
      Profile.objects.create(user=instance) 
     except: 
      pass 

post_save.connect(post_save_profile, sender=settings.AUTH_USER_MODEL) 

和更新如生日信息和头像，你可以使用的ModelForm。

forms.py：

class UploadFileForm(forms.ModelForm): 
    class Meta: 
     model = Profile 
     fields = ('birthdate', 'avatar') 

    def __init__(self, *args, **kwargs): 
     super(UploadFileForm, self).__init__(*args, **kwargs) 
     self.fields['avatar'].required = False 

您views.py：

def view_avatar(request): 
    user = request.user 
    if request.method == "POST": 
     form = UploadFileForm(request.POST, request.FILES, instance=user.profile) 
      if form.is_valid(): 
       form.save() 

的头像模板，你可以使用这个：

<img src="{% if user.profile.avatar %}{{ user.profile.avatar.url }}{% else %}{% static 'no-avatar.jpg' %}{% endif %}"><i></i>