Hi,
I a have a question about changing help_text in a model derived from
another model. In my case, all of the models use the same form, generated
from model.
Few classes share the same TextField. But the meaning of the field is
different in different models. The following is a simplified version to
illustrate the question, errors are probably added ;-).
#models.py:
from django.utils.html import format_html
import django.db.models.options as options
options.DEFAULT_NAMES = options.DEFAULT_NAMES + ('help_texts',)
class Fact(models.Model):
"Model with plain text"
name = models.TextField(help_text="Simple text, it will be escaped in html")
def __unicode__(self):
return self.name
class ReST(Fact):
"""Derived model with ReStructured Text, it will be converted to html and
marked safe.
This model needs a different self.name.help_text, but assigning to it in
__init__ is not possible (self.name is None when __init__ is running)
"""
def __unicode__(self):
return format_html(rest_to_html(self.name))
class Meta:
help_texts = {'name': 'You can use ReST formating here.'}
#views.py:
class BaseCreateView(CreateView):
def get_form_class(self):
model = class_by_name(self.kwargs['fmname'])
opts = model._meta
if hasattr(opts, 'help_texts'):
for fl in opts.concrete_fields:
if fl.name in opts.help_txt:
fl.help_text = opts.help_txt[fl.name]
form = model_forms.modelform_factory(model)
return form
The above use of Meta results in a situation, that with one class more
(derived from ReST), its help_text value depends on history of using forms
for ReST and Fact...
My question: is there a way to change help_text of a model field defined in
a parent class from within a derived model class?
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