Django Upload File and Save in Model
Past Vitor Freitas
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How to Upload Files With Django
Updated at Nov 2, 2018: Equally suggested past @fapolloner, I've removed the manual file handling. Updated the example using FileSystemStorage instead. Thanks!
In this tutorial y'all 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 lawmaking of the examples I used then you can endeavor 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 data ends up placed in request.FILES.
It is mandatory for the HTML form to have the aspect enctype="multipart/form-data" fix correctly. Otherwise the request.FILES will be empty.
The course must be submitted using the POST method.
Django accept proper model fields to handle uploaded files: FileField and ImageField.
The files uploaded to FileField or ImageField are not stored in the database but in the filesystem.
FileField and ImageField are created as a string field in the database (unremarkably VARCHAR), containing the reference to the actual file.
If you delete a model instance containing FileField or ImageField, Django volition not delete the physical file, but only the reference to the file.
The request.FILES is a dictionary-like object. Each key in request.FILES is the name from the <input blazon="file" proper noun="" />.
Each value in request.FILES is an UploadedFile instance.
You lot will need to prepare MEDIA_URL and MEDIA_ROOT in your projection'southward settings.py.
MEDIA_URL = '/media/' MEDIA_ROOT = os . path . bring together ( BASE_DIR , 'media' ) In the evolution 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 = [ # Projection 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 together django.template.context_processors.media to your context_processeors within the TEMPLATES config.
Elementary File Upload
Following is a minimal file upload instance using FileSystemStorage. Utilise it just to learn about the catamenia of the process.
simple_upload.html
{% extends 'base.html' %} {% load static %} {% block content %} <grade method= "post" enctype= "multipart/class-information" > {% csrf_token %} <input type= "file" name= "myfile" > <push 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 'home' %}" >Render to home</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 == 'POST' and request . FILES [ 'myfile' ]: myfile = request . FILES [ 'myfile' ] fs = FileSystemStorage () filename = fs . save ( myfile . proper name , myfile ) uploaded_file_url = fs . url ( filename ) return render ( request , 'core/simple_upload.html' , { 'uploaded_file_url' : uploaded_file_url }) return return ( request , 'core/simple_upload.html' ) File Upload With Model Forms
Now, this is a way more user-friendly fashion. Model forms perform validation, automatically builds the absolute path for the upload, treats filename conflicts and other mutual tasks.
models.py
from django.db import models class Document ( models . Model ): description = models . CharField ( max_length = 255 , blank = True ) document = models . FileField ( upload_to = 'documents/' ) uploaded_at = models . DateTimeField ( auto_now_add = True ) forms.py
from django import forms from uploads.core.models import Document form DocumentForm ( forms . ModelForm ): form Meta : model = Certificate fields = ( 'clarification' , 'certificate' , ) views.py
def model_form_upload ( request ): if request . method == 'POST' : form = DocumentForm ( asking . POST , asking . FILES ) if form . is_valid (): form . salve () render redirect ( 'habitation' ) else : form = DocumentForm () render return ( request , 'core/model_form_upload.html' , { 'form' : form }) model_form_upload.html
{% extends 'base.html' %} {% block content %} <grade method= "post" enctype= "multipart/form-data" > {% csrf_token %} {{ course.as_p }} <push type= "submit" >Upload</push button> </class> <p><a href= "{% url 'home' %}" >Render to habitation</a></p> {% endblock %} About the FileField upload_to Parameter
See the example beneath:
document = models . FileField ( upload_to = 'documents/' ) Notation the upload_to parameter. The files will exist automatically uploaded to MEDIA_ROOT/documents/.
It is also possible to do something like:
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 be a callable that returns a string. This callable accepts two parameters, example and filename.
def user_directory_path ( instance , filename ): # file volition be uploaded to MEDIA_ROOT/user_<id>/<filename> return 'user_{0}/{one}' . format ( example . user . id , filename ) course MyModel ( models . Model ): upload = models . FileField ( upload_to = user_directory_path ) Download the Examples
The lawmaking used in this postal service is available on Github.
git clone https://github.com/sibtc/simple-file-upload.git pip install django python manage.py migrate python manage.py runserver Pop Posts
Source: https://simpleisbetterthancomplex.com/tutorial/2016/08/01/how-to-upload-files-with-django.html
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