According to the get_json docs: [..] function will return None if the mimetype is not application/json but this can be overridden by the force parameter. So, either specify the mimetype of the incoming request to be application/json: curl localhost:5000/post -d ‘{“foo”: “bar”}’ -H ‘Content-Type: application/json’ or force JSON decoding with force=True: data = request.get_json(force=True) If … Read more
The index.js is probably not served by your flask instance, but it is most definitely not processed by your templateing engine and even if it would it would not have the same context as the html it is requested for. I think the cleanest solution would be to have an initiation function in your index.js … Read more
You can apply a filter in Artist.albums.any(), which will generate a subquery: Artist.query.filter(Artist.albums.any(genre_id=genre.id)).all() Or you can use a join() on albums: Artist.query.join(Artist.albums).filter_by(genre_id=genre.id).all()
In a many to many relationship, the primaryjoin expression describes the join between the left table and the junction table, and the secondaryjoin describes the join between the junction table and the right table. In other words, the primaryjoin expression is saying, “find all rows in the followers table where follower_id is X”, the secondaryjoin … Read more
Looking at the mysql docs, we can see that there are a bunch of reasons why this error can occur. However, the two main reasons I’ve seen are: 1) The most common reason is that the connection has been dropped because it hasn’t been used in more than 8 hours (default setting) By default, the … Read more
You are looking for the Optional validator. start = DateField(‘Start Date’, format=”%m/%d/%Y”, validators=(validators.Optional(),))
You are missing the ProxyFix() middleware component. See the Flask Proxy Setups documentation. There is no need to subclass anything; simply add this middleware component to your WSGI stack: # Werkzeug 0.15 and newer from werkzeug.middleware.proxy_fix import ProxyFix from flask import Flask app = Flask(__name__) app.wsgi_app = ProxyFix(app.wsgi_app, x_proto=1) If you have Flask installed, you … Read more
The issue is that you’re always rendering the form with whatever data was passed in, even if that data validated and was handled. In addition, the browser stores the state of the last request, so if you refresh the page at this point the browser will re-submit the form. After handling a successful form request, … Read more
This is an additional security measure provided by Werkzeug (which is one of the dependencies for Flask) to prevent the debugger from being accessible without the knowledge of the PIN. You can use the debugger pin in the browser to launch the interactive debugger. Please note you should never be using DEBUG mode in Production … Read more