django-dynamic-model
Django Dynamic Model provides models which can be modified (fields added, or removed) at runtime, from the code, without changing SQL database schema.
The dynamic fields can coexist with regular fields, can be picked up
and used by model forms, and can be accessed in the usual object.field
fashion in the code and templates.
The dynamic models aren't schemaless: valid fields are defined using
DynamicSchema and DynamicSchemaField models.
Here's a quick example:
from dynamicmodel.models import DynamicModel, DynamicSchema, DynamicForm
class MyModel(DynamicModel):
name = models.CharField(max_length=100) # regular field
schema = DynamicSchema.get_for_model(MyModel)
schema.add_field(name='nickname', type='CharField')
schema.add_field(name='age', type='IntegerField')
m1 = MyModel(name='John Doe')
print m1.nickname # None
m1.nickname = 'JD'
m1.age = 21
m1.save()
class MyForm(DynamicForm):
class Meta:
model = MyModel
form = MyForm({'field': 'foo'}, instance=m1)
form.save()
Installation
Install via pip directly from GitHub:
pip install -e git+http://github.com/dobarkod/django-dynamic-model#egg=django-dynamic-model
Tests and docs
Documentation is sparse at the moment. Look at the tests for examples how to use it (beyond the quick example above).
Warning
Caveat emptor: This is beta software; the API will change a lot, and it may still have serious bugs that will eat your data! All bug reports, fixes, suggestions or pull requests are welcome.
License
Copyright (C) 2012. GoodCode; Bundles JSONField copyright (c) 2012 Brad Jasper
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.