4adkMGtg

1# -*- coding: utf-8 -*-
2
3from flask import Flask, request, render_template, current_app
4from flask_wtf import Form
5from wtforms.validators import DataRequired
6from wtforms import SelectField, SelectMultipleField, SubmitField
7
8
9app = Flask(__name__)
10
11app.config.update(dict(
12    SECRET_KEY = 'your_secret_key',
13    CSRF_ENABLED = True,
14))
15
16
17class Select2MultipleField(SelectMultipleField):
18
19    def pre_validate(self, form):
20        # Prevent "not a valid choice" error
21        pass
22
23    def process_formdata(self, valuelist):
24        if valuelist:
25            self.data = ",".join(valuelist)
26        else:
27            self.data = ""
28
29
30class DemoForm(Form):
31    single_select = SelectField(u"单选", [DataRequired()],
32            choices=[("py", "python"), ("rb", "ruby"), ("js", "javascript")],
33            description=u"有限选项。无效化。",
34            render_kw={"disabled": "true"})
35    single_dynamic_select = SelectField(u"单选", [DataRequired()],
36            choices=[("0", "")],
37            description=u"动态加载选项。",
38            render_kw={})
39    multi_select = Select2MultipleField(u"选择框", [],
40            choices=[("py", "python"), ("rb", "ruby"), ("js", "javascript")],
41            description=u"多选。有限选项。",
42            render_kw={"multiple": "multiple"})
43    tags = Select2MultipleField(u'标签', [],
44            choices=[("py", "python"), ("rb", "ruby"), ("js", "javascript")],
45            description=u"多选。无限选项。",
46            render_kw={"multiple": "multiple", "data-tags": "1"})
47    submit = SubmitField()
48
49
50@app.route("/demo", methods=["GET", "POST"])
51def demo():
52    form = DemoForm(request.form)
53
54    if form.validate_on_submit():
55        current_app.logger.debug(form.data)
56
57    return render_template("demo.html", form=form)
58
59
60if __name__ == "__main__":
61    app.run(debug=True)