wondering how dynamic fields could be added to a model...

gistfile1.py

# wondering how dynamic fields could be added to a model...

import copy
from django.db import models

class DynamicModel(models.base.ModelBase):
    
    def _prepare(cls):
        # calling a function or method to return the extra fields to 
        # add to the model
        for field_name, field in get_extra_fields():
            cls.add_to_class(field_name, copy.deepcopy(field))
        models.base.ModelBase._prepare(cls)


#### this is what the user would have to create

## the function that returns the fields to add
def get_extra_fields():
    test_fields = (
        ("author", models.ForeignKey("auth.User")),
    )
    return test_fields


class News(models.Model):
    
    ## find a way to customize the model metaclass, the problem if we 
    ## adding extra fields, we don't want to change the model code, so
    ## we need a (hacky) way to add this metaclass...
    __metaclass__ = DynamicModel
    
    title = models.CharField(max_length=100)
    content = models.TextField()
    
    def __unicode__(self):
        return self.title