File Upload In Flask :

Project Setup

• Making the project as :

     mkdir file_upload_in_flask
     cd file_upload_in_flask
  

• Install flask:

      pip install flask
  

• Integrating SqlAlchemy

    pip install sqlalchemy
  

  • create folder structure like this :

    

• Declaring Models:

  from db.db import db
  import datetime
     
  class Profile(db.Model):
     id = db.Column(db.Integer, primary_key=True)
     img_name = db.Column(db.String(255), nullable=False)
     created_at = db.Column(db.DateTime, default=datetime.datetime.utcnow, nullable=False)
  
  

• create settings.py for configuration

  # configuration
  class Config:
     DEBUG = True
     # db
     SQLALCHEMY_DATABASE_URI = 'mysql://root:root@localhost/djangoapp'
     SQLALCHEMY_TRACK_MODIFICATIONS = False
  

• create db.py for configuration

  from flask_sqlalchemy import SQLAlchemy
  db = SQLAlchemy()
  

• Make a runserver configuration

  app = Flask(__name__)
  app.config.from_object('settings.Config')
  db = SQLAlchemy(app)
  
  if __name__ == "__main__":
     app.run(debug=True)
  

• create html file inside templates folder

  • check project directory for index.html file

• create curd def in EmployeeManagementSystem.py

  import os
  
  from flask import Flask, render_template, request, redirect, flash
  from sqlalchemy.exc import IntegrityError
  from werkzeug.utils import secure_filename
  
  from db.db import db
  from models.app_model import Profile
  
  app = Flask(__name__)
  app.secret_key = 'asrtarstaursdlarsn'
  app.config.from_object('settings.Config')
  app.config["IMAGE_UPLOADS"] = "./static/images/profiles"
  app.config["ALLOWED_IMAGE_EXTENSIONS"] = ["JPEG", "JPG", "PNG", "GIF"]
  
  # initialization
  db.init_app(app)
      
      
      def allowed_image(filename):
          if not "." in filename:
              return False
          ext = filename.rsplit(".", 1)[1]
          if ext.upper() in app.config["ALLOWED_IMAGE_EXTENSIONS"]:
              return True
          else:
              return False
      
      
      @app.route('/', methods=['GET', 'POST'])
      def upload_file():
          if request.method == 'POST':
              image = request.files["img_name"]
              if image.filename == "":
                  flash('Please Upload Image file', "danger")
                  return redirect(request.url)
              if allowed_image(image.filename):
                  filename = secure_filename(image.filename)
                  try:
                      profile_entry = Profile(img_name=filename)
                      db.session.add(profile_entry)
                      db.session.commit()
                      image.save(os.path.join(app.config["IMAGE_UPLOADS"], filename))
                      flash('File upload Successfully !', "success")
                  except IntegrityError as e:
                      flash('Something went wrong please try again later', "danger")
                      return redirect(request.url)
              else:
                  flash('That file extension is not allowed', "danger")
                  return redirect(request.url)
          profiles = Profile.query.all()
          return render_template('index.html', profiles=profiles)
      
      
      # run always put in last statement or put after all @app.route
      if __name__ == '__main__':
          app.run(host='localhost')
  
  

• In order to run app:

    python app.py
  

• run on your browser

  • Your should run at: http://localhost:5000/