flask-wtforms

I am currently working on an address form using wtf, which contains Country, State, City..etc. The database is all set with FK. class Country(db.Model): __tablename__ = 'countries' id = db.Column(db.Integer, primary_key=True) name = db.Column(db.String(64), unique=True) users = db.relationship('User', backref='countries', lazy='dynamic') class City(db.Model): __tablename__ = 'cities' id = db.Column(db.Integer, primary_key=True) name = db.Column(db.String(64), unique=True) countries_id = db.Column(db.Integer, db.ForeignKey('countries.id')) Now I am trying to achieve a chained selectfield sort

My model currently has three related objects (there are more, but only three are relevant to this problem). User, Network, and Email. What I want to be able to do is have a defined set of Networks, and to allow each User to have an Email address on each Network (these are slightly more complex, but I've cut them down to what I think is relevant). class User(UserMixin, db.Model): """ The User object. """ __tablename__ = 'users' id = db.Column(db.Integer, primary_key=True) # email = db.Column(db.String(64), unique=True, index=True) username = db.Column(db.String(64), unique=True, index=True)

I'm just getting started with Flask / Flask-WTF / SQLAlchemy, and most example CRUD code I see shows separate templates for adding / editing. It seems repetitive to have two templates with almost identical form html (e.g. books_add.html, books_edit.html). Conceptually it makes more sense to me to have one template, something like "books_form.html", and just call render_template on that same template from two separate route definitions. I'm not quite sure how to accomplish it though, something like: @app.route('/books/add') def add_book(): ... render_template('books_form.html', action = 'add')

My application uses a combination of Flask, Flask-SQLAlchemy, Flask-WTF and Jinja2. In its current incarnation, I have a settings table. The table will only have one record with one field. Initially the table contains zero records. What I want to achieve is: Given that no entries exist in db, then show empty form ready for user input Given that an entry exist, show the entry, and if the user changes the value, then update the rec in db. Here is my code: models.py class Provider(db.Model): id = db.Column(db.Integer, primary_key = True) rssfeed = db.Column(db.String(120), unique = True) def _

I have a Flask view with a Flask-WTF form. When I load the page in the browser, the form always has errors, even though I haven't submitted it yet. Why does the form have errors before it is submitted? @app.route('/', methods=['GET', 'POST']) def index(): form = ApplicationForm(request.form) if form.is_submitted(): print "Form successfully submitted" if form.validate(): print "valid" print(form.errors) if form.validate_on_submit(): return redirect('index') return render_template('index.html', form=form) 127.0.0.1 - - [30/Nov/2016 16:54:12] "GET / HTTP/1.1" 200 - {'department': [u'Not a valid

I'm trying out Flask but I'm having the error sqlalchemy.exc.InterfaceError: <unprintable InterfaceError object> while submitting a wtforms. The model class is: class Post(db.Model): __tablename__ = 'blog_posts' id = db.Column(db.Integer, unique=True, primary_key=True) title = db.Column(db.String(50), unique=False) content = db.Column(db.Text, unique=False) user_id = db.Column(db.String, db.ForeignKey('users.username')) @staticmethod def post_new_entry(title, content, user_id): """ Post new entry to database """ new_post = Post(title=title, content=content, user_id=user_id) db.session.add(new