# -*- coding: utf-8 -*-

from flask import Flask, request, render_template, current_app
from flask_wtf import Form
from wtforms import SelectMultipleField, SubmitField


app = Flask(__name__)
app.config.update(dict(
    DEBUG=True,
    SECRET_KEY='development key',
    CSRF_ENABLED = True,
))


class Select2MultipleField(SelectMultipleField):

    def pre_validate(self, form):
        # Prevent "not a valid choice" error
        pass


class Select2TagForm(Form):
    tags = Select2MultipleField(u'Tags',
                choices=[("1", "python"), ("2", "flask"), ("3", "wtforms")])
    submit = SubmitField()



@app.route("/", methods=["GET", "POST"])
def index():
    form = Select2TagForm(request.form)

    if form.validate_on_submit():
        current_app.logger.debug(form.tags.data)

    return render_template("index.html", form=form)


if __name__ == "__main__":
    app.run(debug=True)