I'm trying to define a wtf Form programatically, ie, not typing things out by hand. I want to avoid ABCForm, and use ABCForm2 instead (the list of variables could eventually be passed in):
class ABCForm(Form):
a = FloatField('a')
b = FloatField('b')
c = FloatField('c')
class ABCForm2(Form):
def __new__(cls, *args, **kwargs):
fieldnames = ['a','b','c']
for fieldname in fieldnames:
field = FloatField(fieldname)
setattr(cls, fieldname, field)
return super(ABCForm2, cls).__new__(cls, *args, **kwargs)
However, I'm having trouble calling form = ABCForm2(csrf_enabled=False) in my flask_app. The error I get is
File "/home/FPFIconsulting/mysite/growth_flask/flask_app.py", line 37, in test2
form = ABCForm2(csrf_enabled=False)
File "/usr/local/lib/python2.7/dist-packages/wtforms/form.py", line 178, in __call__
return type.__call__(cls, *args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/flask_wtf/form.py", line 77, in __init__
super(Form, self).__init__(formdata, obj, prefix, csrf_context=csrf_context, *args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/wtforms/ext/csrf/form.py", line 21, in __init__
super(SecureForm, self).__init__(formdata, obj, prefix, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/wtforms/form.py", line 226, in __init__
super(Form, self).__init__(self._unbound_fields, prefix=prefix)
File "/usr/local/lib/python2.7/dist-packages/wtforms/form.py", line 38, in __init__
for name, unbound_field in fields:
TypeError: 'NoneType' object is not iterable
What am I doing wrong?
giles
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PythonAnywhere staff
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