从 django 前端上传和检索文件到 postgresql 后端

Question

这是我在 postgres 中的表格：

我如何将其引入前端，以便用户无需访问数据库即可上传他们的文档。现在我只能将文档上传到文件系统而不是数据库：

views.py：

def upload(request):
if request.user.is_authenticated:
    username = request.user.username
if request.method == 'POST' and request.FILES['myfile']:
    myfile = request.FILES['myfile']
    fs = FileSystemStorage()
    filename = fs.save(myfile.name, myfile)
    uploaded_file_url = fs.url(filename)
    return render(request, 'app/upload.html', {
       "uploaded_file_url": uploaded_file_url,
       "username": username,
    })
return render(request, 'app/upload.html', {
    "username": username,
})

上传.html：

 {% if form.errors %}
    <p>You did not select a file to upload!</p>
{% endif %}

<form method="POST" enctype="multipart/form-data">
    {% csrf_token %}
    <input type="file" name="myfile">
    <button type="submit">Upload</button>
</form>

{% if uploaded_file_url %}
    <p>File uploaded at: <a href="{{ uploaded_file_url }}">{{ uploaded_file_url }}</a></p>
{% endif %}

models.py：

class Document(models.Model):
Document_name = models.CharField(max_length=255, default='Document_name')
Date = models.DateField()
Client_id = models.ForeignKey(ClientDetail, on_delete=models.CASCADE)


def __str__(self):
    return self.Document_name

架构：

还有我将如何检索上传的文档。

Answer 1

给你一个例子：

settings.py

MEDIA_URL = '/media/'
MEDIA_ROOT = os.path.join(BASE_DIR, 'media')

urls.py

from django.conf.urls.static import static
urlpatterns = [
    ...
] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

models.py

from django.core.validators import FileExtensionValidator
class Document(models.Model):
    name = models.CharField(max_length=255, default='Document_name')
    date = models.DateField()
    client = models.ForeignKey(ClientDetail, on_delete=models.CASCADE)
    myfile = models.FileField(validators=[
        FileExtensionValidator(allowed_extensions=['pdf', 'doc', 'ppt', 'xlsx'])
    ])

    def __str__(self):
        return self.name

forms.py

from django import forms
from .models import Document
class DocumentForm(forms.ModelForm):
    class Meta:
        model = Document
        fields = '__all__'

上传.html：

<form method="post" enctype="multipart/form-data">
    {% csrf_token %}
    {{ form.as_p }}
    <input type="submit" value="ok">
</form>
{% if uploaded_file_url %}
    <p>File uploaded at: <a href="{{ uploaded_file_url }}">{{ uploaded_file_url }}</a></p>
{% endif %}

views.py

def upload(request):
    if request.user.is_authenticated: 
        # Is it better to use @login_required ?
        username = request.user.username
    else:
        username = ''
    if request.method == 'POST':
        form = DocumentForm(request.POST, request.FILES)
        if form.is_valid():
            doc = form.save()
            return render(request, 'app/upload.html', {
               "form": DocumentForm(),
               "uploaded_file_url": doc.myfile.url,
               "username": username,
            })
    else:
        form = DocumentForm()
    return render(request, 'app/upload.html', {"form": form})