Flask wtforms - 'UnboundField' object is not callable, dynamic field won't init properly

Question

app.py

from flask import Flask, render_template
from flask_wtf import FlaskForm
from wtforms import StringField, SubmitField, FieldList, FormField

app = Fla         


        

Answer 1

It's not the ideal solution, but this works though.

from flask import Flask, render_template
from flask_wtf import FlaskForm, Form
from wtforms import StringField, SubmitField, FieldList, FormField

app = Flask(__name__)
app.config['SECRET_KEY'] = 'apple pie'


class BookForm(FlaskForm):
    book = StringField('book title')


class LibraryForm(FlaskForm):
    library = StringField('Library name')
    books = FieldList(FormField(BookForm))
    submit = SubmitField('Submit')


@app.route('/book', methods=['GET', 'POST'])
def book():
    form = LibraryForm()
    if form.validate_on_submit():
        return 'aww yeah'
    for i in range(6):
        form.books.append_entry()

    return render_template('books.html', form = form)