XPPL/app/forms.py

from flask_wtf import FlaskForm
from wtforms import StringField, FileField, validators
from wtforms.validators import InputRequired, DataRequired
from wtforms import FieldList
from wtforms import Form as NoCsrfForm
from wtforms.fields import StringField, FormField, SubmitField
from app.models import Book, BookSchema, Author

# - - - Forms - - -
class AuthorForm(NoCsrfForm):
    # this forms is never exposed so we can user the non CSRF version
    author_name = StringField('Author Name', validators=[DataRequired()])

class UploadForm(FlaskForm):
    title = StringField('title', validators=[InputRequired()])
    author = FieldList(FormField(AuthorForm, default=lambda: Author()), min_entries=1)
    category = StringField('category', validators=[InputRequired()])
    year_published = StringField('year published', [validators.Length(min=4, max=4)])
    file = FileField()
    upload = SubmitField(label='Upload')
    wish = SubmitField(label='''I don't have the file, but wish I did.''')

class EditForm(FlaskForm):
    title = StringField('title', validators=[InputRequired()])
    author = FieldList(FormField(AuthorForm, default=lambda: Author()), min_entries=1)
    category = StringField('category', validators=[InputRequired()])

class SearchForm(FlaskForm):
    search = StringField('', validators=[InputRequired()])