如何用modelform更新django 2.1中的图像?[复制品]

试试这样:

Models.py:

class banner(models.Model):
#id is made by Django
name = models.CharField(max_length=255)
created_by = models.CharField(max_length=255)
company = models.CharField(max_length=255)
register_date = models.DateField(auto_now_add=True)
file = models.FileField(upload_to='files/', null=True, blank=True)
file_name = models.CharField(max_length=255)

PYS:

class BannerForm(forms.ModelForm):
    class Meta:
        model = banner #Or Banner ??
        fields = ('name', 'created_by', 'company', 'file', 'file_name' )

查看:

from myapp.forms import BannerForm

if request.method == "POST":
    form = BannerForm(request.POST, request.FILES)
    if form.is_valid():
        entry = form.save(commit=False)
        entry.name = request.POST['name']
        entry.created_by = request.POST['created_by']
        entry.company = request.POST['company']
        entry.file_name = request.POST['file_name']
        form.save()

    else:
      form = BannerForm()

return render(request, "add_banner.html",locals())

如前所述,不要忘记:

<form method="POST" action="" enctype="multipart/form-data">
    {% csrf_token %}
    {{form.name}}
    {{form.created_by}}
    {{form.company}}
    {{form.file_name}}
    {{form.file}}
    <input type="submit">
</form>

您不必指定这些内容:

new_banner.file=form.cleaned_data['file']

new_banner.register_date=form.cleaned_data['register_date'] ->无用,因为在您的模型中,您设置了auto_now_add=true,所以您不需要在HTML表单中生成字段。

注:如果你的领域 created_by = models.CharField(max_length=255) 是放置现有用户,因此您应该将外键字段设置为:

from django.contrib.auth.models import User
created_by = models.ForeignKey(User, verbose_name="Created by")

你需要包括 enctype="multipart/form-data" 在你的表单定义中。

<form method="post" action="your action" enctype="multipart/form-data">
    {% csrf_token %}
    ...
</form>

你需要在你的模型中指定上传路径

file = models.FileField(null=True, blank=True,upload_to='files')

确保你有 MEDIA_ROOT 和 MEDIA_URL 在您的设置中定义.py

以你的形式

<form method="post" action="" enctype="multipart/form-data">
    {% csrf_token %}
    ...
</form>