How can I implement file uploads with user feedback in Flask-WTF?

How can I implement file uploads with user feedback in Flask-WTF?

You can use Flask-WTF to handle file uploads by creating a form with a FileField. You can also provide user feedback by displaying messages after the upload.

What do I need to include in my form for file uploads?

You'll need to include a FileField in your form class and ensure your HTML form has the attribute enctype='multipart/form-data'.

How can I show success or error messages after the upload?

You can use Flask's flash messaging system to display success or error messages after the file upload process.

Can you give me an example of the code for this?

Sure! Here's a simple example:

from flask import Flask, render_template, request, flash
from flask_wtf import FlaskForm
from wtforms import FileField, SubmitField

class UploadForm(FlaskForm):
    file = FileField('Upload File')
    submit = SubmitField('Submit')

@app.route('/upload', methods=['GET', 'POST'])
def upload():
    form = UploadForm()
    if form.validate_on_submit():
        # Handle file upload
        flash('File uploaded successfully!')
    return render_template('upload.html', form=form)

What if I want to restrict the file types that can be uploaded?

You can check the file's extension in your upload handling logic and reject files that don't match your allowed types.