I'm using django with many related projects. All those projects are using
their own models. But unfortunately this is not DRY, because each model
differ from each other very slightly, for example some columns or tables
from one model are missing in other, or some model defines custom save
method while the other one does not.
My idea was to define simple core model - the one that has all tables and
columns and no custom methods.
Then I could dynamically create other models using code like this:
def createModelClass(modelClass):
dict = {}
for field in modelClass._meta.fields:
if modelClass.__name__ not in EXCLUDED_FIELDS or field.name
not in EXCLUDED_FIELDS[modelClass.__name__]:
dict[field.name] = field
dict["Meta"] = type('Meta', (ChemblCoreAbstractModel.Meta, object),
{'unique_together': modelClass._meta.unique_together})
dict["__module__"] = mod.__name__
return type(modelClass.__name__, (CoreAbstractModel, ), dict)
#------------------------------------------------------
def getCoreModelClasses(module):
return [x[1] for x in
inspect.getmembers(sys.modules[module.__name__]) if
inspect.isclass(x[1]) and issubclass(x[1],
CoreAbstractModel) and x[1].__name__ not in EXCLUDED_MODELS]
Unfortunately I can't do this because fields remember their models
(especially related fields). So in principle I would have to change the
code to create new fields from scratch just reading attributes from the
original model.
This makes no sense: inspect model to create another model. In that case
would be much better to create model from some XML specification that would
be easier to read and modify and which is not bound to any particular
django app.
So my question is - is there any django plugin that allows to express model
in terms of xml and then create app specific model from this xml?
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