Custom File Upload Handler No Request File Data Python
Past Vitor Freitas
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How to Upload Files With Django
Updated at November 2, 2018: Equally suggested by @fapolloner, I've removed the manual file handling. Updated the example using FileSystemStorage instead. Thanks!
In this tutorial you will larn the concepts behind Django file upload and how to handle file upload using model forms. In the end of this post you will find the source code of the examples I used and then you can try and explore.
This tutorial is also available in video format:
The Basics of File Upload With Django
When files are submitted to the server, the file information ends upwardly placed in request.FILES.
It is mandatory for the HTML form to take the attribute enctype="multipart/form-data" prepare correctly. Otherwise the request.FILES will be empty.
The course must exist submitted using the Mail service method.
Django have proper model fields to handle uploaded files: FileField and ImageField.
The files uploaded to FileField or ImageField are not stored in the database simply in the filesystem.
FileField and ImageField are created as a string field in the database (unremarkably VARCHAR), containing the reference to the bodily file.
If you delete a model instance containing FileField or ImageField, Django will not delete the physical file, but only the reference to the file.
The request.FILES is a dictionary-like object. Each key in asking.FILES is the proper name from the <input type="file" name="" />.
Each value in asking.FILES is an UploadedFile case.
Yous will need to set MEDIA_URL and MEDIA_ROOT in your projection's settings.py.
MEDIA_URL = '/media/' MEDIA_ROOT = os . path . join ( BASE_DIR , 'media' ) In the development server you may serve the user uploaded files (media) using django.contrib.staticfiles.views.serve() view.
from django.conf import settings from django.conf.urls.static import static urlpatterns = [ # Project url patterns... ] if settings . DEBUG : urlpatterns += static ( settings . MEDIA_URL , document_root = settings . MEDIA_ROOT ) To access the MEDIA_URL in template you must add django.template.context_processors.media to your context_processeors inside the TEMPLATES config.
Simple File Upload
Post-obit is a minimal file upload instance using FileSystemStorage. Use it just to acquire virtually the flow of the process.
simple_upload.html
{% extends 'base of operations.html' %} {% load static %} {% cake content %} <form method= "post" enctype= "multipart/form-data" > {% csrf_token %} <input blazon= "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 %} <p><a href= "{% url 'dwelling' %}" >Render to habitation</a></p> {% endblock %} views.py
from django.shortcuts import render from django.conf import settings from django.core.files.storage import FileSystemStorage def simple_upload ( request ): if request . method == 'Mail' and request . FILES [ 'myfile' ]: myfile = request . FILES [ 'myfile' ] fs = FileSystemStorage () filename = fs . salve ( myfile . proper name , myfile ) uploaded_file_url = fs . url ( filename ) return render ( request , 'core/simple_upload.html' , { 'uploaded_file_url' : uploaded_file_url }) render render ( request , 'core/simple_upload.html' ) File Upload With Model Forms
Now, this is a fashion more user-friendly fashion. Model forms perform validation, automatically builds the absolute path for the upload, treats filename conflicts and other common tasks.
models.py
from django.db import models class Document ( models . Model ): clarification = models . CharField ( max_length = 255 , blank = Truthful ) document = models . FileField ( upload_to = 'documents/' ) uploaded_at = models . DateTimeField ( auto_now_add = Truthful ) forms.py
from django import forms from uploads.core.models import Document class DocumentForm ( forms . ModelForm ): class Meta : model = Certificate fields = ( 'description' , 'document' , ) views.py
def model_form_upload ( request ): if asking . method == 'POST' : form = DocumentForm ( request . POST , request . FILES ) if class . is_valid (): form . save () return redirect ( 'home' ) else : form = DocumentForm () return render ( request , 'core/model_form_upload.html' , { 'form' : form }) model_form_upload.html
{% extends 'base.html' %} {% block content %} <form method= "post" enctype= "multipart/class-data" > {% csrf_token %} {{ form.as_p }} <button type= "submit" >Upload</button> </form> <p><a href= "{% url 'home' %}" >Render to home</a></p> {% endblock %} Nearly the FileField upload_to Parameter
Come across the example below:
document = models . FileField ( upload_to = 'documents/' ) Note the upload_to parameter. The files volition be automatically uploaded to MEDIA_ROOT/documents/.
It is also possible to do something similar:
document = models . FileField ( upload_to = 'documents/ % Y/ % m/ % d/' ) A file uploaded today would be uploaded to MEDIA_ROOT/documents/2016/08/01/.
The upload_to can also exist a callable that returns a string. This callable accepts two parameters, instance and filename.
def user_directory_path ( instance , filename ): # file volition be uploaded to MEDIA_ROOT/user_<id>/<filename> render 'user_{0}/{1}' . format ( example . user . id , filename ) class MyModel ( models . Model ): upload = models . FileField ( upload_to = user_directory_path ) Download the Examples
The code used in this postal service is bachelor on Github.
git clone https://github.com/sibtc/elementary-file-upload.git pip install django python manage.py migrate python manage.py runserver Pop Posts
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Source: https://simpleisbetterthancomplex.com/tutorial/2016/08/01/how-to-upload-files-with-django.html