from django.db import models
from django.db.models import *


def hack_subclasses(*field_class_names, **kwargs):
    old_base = kwargs['old_base']
    new_base = kwargs['new_base']
    for subclass in old_base.__subclasses__():
        if subclass is not new_base:
            if not field_class_names or subclass.__name__ in field_class_names:
                if old_base in subclass.__bases__:
                    bases = list(subclass.__bases__)
                    i = 0
                    for base in bases:
                        if base is old_base:
                            bases[i] = new_base
                        i += 1
                    subclass.__bases__ = tuple(bases)


class Field(models.Field):
    def __init__(self, *args, **kwargs):
        try:
            self.html_attributes = kwargs.pop('html_attributes')
        except KeyError, e:
            self.html_attributes = {}
        models.Field.__init__(self, *args, **kwargs)


hack_subclasses('CharField', 'TextField', old_base=models.Field, new_base=Field)



### OVERRIDEN MODEL FIELDS

import forms # relative import

class CharField(models.CharField):
    def get_manipulator_field_objs(self):
        return [curry(forms.TextField, html_attributes=self.html_attributes)]

class TextField(models.TextField):
    def get_manipulator_field_objs(self):
        return [curry(forms.LargeTextField, html_attributes=self.html_attributes)]