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Library that works with Flask & SqlAlchemy to store files in your database and server.

Project description

Documentation Status PyPI version PyPI - Python Version PyPI - License

FlaskFileUpload

Library that works with Flask & SqlAlchemy to store files on your server & in your database

Read the docs: Documentation

Installation

pip install flask-file-upload

Flask File Upload

General Flask config options
    # Important: The below configuration variables need to be set  before
    # initiating `FileUpload`
    UPLOAD_FOLDER = join(dirname(realpath(__file__)), "uploads/media")
    ALLOWED_EXTENSIONS = ["jpg", "png", "mov", "mp4", "mpg"]
    MAX_CONTENT_LENGTH` = 1000 * 1024 * 1024  # 1000mb
    SQLALCHEMY_DATABASE_URI = "postgresql://localhost:5432/blog_db"
Setup

We can either pass the instance to FileUpload(app) or to the init_app(app) method:

app = Flask(__name__)

db = SQLAlchemy()
# Important! See documentation for set up specifics
app.config["SQLALCHEMY_DATABASE_URI"] = SQLALCHEMY_DATABASE_URI
file_upload = FileUpload(app, db)

# An example using the Flask factory pattern
def create_app():
    db.init_app(app)
    file_upload.init_app(app)

# Or we can pass the Flask app instance directly & the Flask-SQLAlchemy instance:
db = SQLAlchemy(app)
file_upload = FileUpload(app, db)
app: Flask = None
Decorate your SqlAlchemy models

Flask-File-Upload (FFU) setup requires each SqlAlchemy model that wants to use FFU library to be decorated with @file_upload.Model .This will enable FFU to update your database with the extra columns required to store files in your database. Declare your attributes as normal but assign a value of file_upload.Column & pass the SqlAlchemy db instance: file_upload.Column(db). This is easy if you are using Flask-SqlAlchemy:

from flask_sqlalchemy import SqlAlchemy

db = SqlAlchemy()

Full example:

from my_app import db, file_upload

@file_upload.Model
class blogModel(db.Model):
   __tablename__ = "blogs"
   id = db.Column(db.Integer, primary_key=True)

   # Your files -  Notice how we pass in the SqlAlchemy instance
   # or `db` to the `file_uploads.Column` class:

   my_placeholder = file_upload.Column(db)
   my_video = file_upload.Column(db)
define files to be upload:
(This is an example of a video with placeholder image attached):
    my_video = request.files["my_video"]
    placeholder_img = request.files["placeholder_img"]
Save files
    file_upload.save_files(blog_post, files={
        "my_video": my_video,
        "placeholder_img": placeholder_img,
    })
Update files
    blog_post = file_upload.update_files(blog_post, files={
        "my_video": new_my_video,
        "placeholder_img": new_placeholder_img,
    })
Delete files
    file_upload.delete_files(BlogPostModel, files=["my_video"])
Stream a file
    file_upload.stream_file(blog_post, filename="my_video")
File Url paths
    file_upload.get_file_url(blog_post, filename="placeholder_img")

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