在我的表单中,我正在尝试创建一个带有选项的自定义数组字段。
自定义表单字段:
class CustomField(Field):
widget = TextInput()
def _value(self):
if self.data:
return u', '.join(self.data)
else:
return u''
def process_formdata(self, valuelist):
if valuelist:
self.data = [x.strip() for x in valuelist[0].split(',')]
else:
self.data = []
实际表单调用自定义表单字段
class PostForm(Form):
status = CustomField()
每当我将数据发布到PostForm
时,它都会调用自定义字段,但不会将任何valuelist
传递给process_formatdata
。自定义字段始终返回空列表。
我在这里遗漏了什么。
答案 0 :(得分:8)
您的代码适合我,这是一个有效的例子 -
from flask import Flask, render_template
from flask.ext.wtf import Form, SubmitField, Field, TextInput
app = Flask(__name__)
app.config['SECRET_KEY'] = 'Shh!'
class CustomField(Field):
widget = TextInput()
def _value(self):
if self.data:
return u', '.join(self.data)
else:
return u''
def process_formdata(self, valuelist):
if valuelist:
self.data = [x.strip() for x in valuelist[0].split(',')]
else:
self.data = []
class ExampleForm(Form):
status = CustomField()
submit = SubmitField('POST')
@app.route('/', methods=['post', 'get'])
def hello_world():
form = ExampleForm()
if form.validate_on_submit():
for entry in form.status.data:
print '{}'.format(entry)
return render_template('test.html', form=form)
if __name__ == '__main__':
app.run(debug=True)
<form action="." method="post">
{{ form.hidden_tag() }}
{{ form.status }}
{{ form.submit }}
</form>