forms.pyfrom django import formsfrom .models import Postsclass PostForm(forms.ModelForm): class Meta: model = Posts fields = ['topic','post','thumbnail','author']models.pyclass Posts(models.Model):topic = models.ForeignKey(Topic,on_delete=models.CASCADE)post = models.TextField()date = models.DateTimeField(auto_now_add=True)author = models.ForeignKey(Author,on_delete=models.CASCADE)thumbnail = models.ImageField()def __str__(self): return f"{self.post[:20]}..."class Meta: verbose_name_plural = 'posts'views.pydef add_post(request):if request.method == 'POST': form = PostForm(data=request.POST) if form.is_valid(): form.save() return redirect("/")else: form=PostForm()context = {'form':form}return render(request,'blog/add_post.html',context)add_post.html<!DOCTYPE html><html><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title></head><body> <form action="{% url 'blog:add_post' %}" method='post'> {% csrf_token %} {{form.as_p}} <input type='submit'> </form></body></html>当我尝试提交表单时，即使我选择了文件，缩略图字段也会自动显示“未选择文件”。所以请帮我解决这个问题！！！
2 回答
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TA贡献1865条经验 获得超7个赞
您必须添加upload_to：
item_image = models.ImageField(
blank = True,
null = True,
upload_to = 'item/image/',
db_column = 'ITEM_IMAGE',
verbose_name = 'IMAGE',
)
请记住为媒体文件分配路径：（在 settings.py 上）
MEDIA_URL = '/media/'
MEDIA_ROOT = os.path.join(BASE_DIR, 'media')
在 forms.py 中：
item_image = forms.ImageField(
required = False,
label = 'Image',
widget = forms.ClearableFileInput(
attrs = {'class': 'form-control mb-2', 'placeholder':
'IMAGE',}
),
)
这是我的 github 和一个 django 项目来指导你：
绝地无双
TA贡献1946条经验 获得超4个赞
您需要添加enctype="multipart/form-data"到您的 html 表单：
<form action="{% url 'blog:add_post' %}" method='post' enctype="multipart/form-data">
{% csrf_token %}
{{form.as_p}}
<input type='submit'>
</form>
并传递request.FILES给您的表格：
def add_post(request):
if request.method == 'POST':
form = PostForm(request.POST, request.FILES)
if form.is_valid():
form.save()
return redirect("/")
else:
form=PostForm()
context = {'form':form}
return render(request,'blog/add_post.html',context)
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