Field objects can have testdata generators

[Jaymon]

So the idea is that you could add an Orm.testdata() method that would look at each field and generate an instance that satisfies the constraints of that field, but you can also override field values. And you could also pass in a testdata generator into Field so you can customize it.

So basically, by default the Field.testdata() would check for choice values, defaults, and things like that and generate a value for that field. The Orm.testdata method would call all the field testdata methods to get a set of field values and then return an instance, something like this:

import testdata

class Foo(Orm):
  bar = Field(str, True, testdata=lambda: testdata.get_str())
  che = Field(int, True)

  def testdata(self, **kwargs):
     for name, f in self.schema.fields.items():
       kwargs.setdefault(name, f.testdata())

     return type(self)(**kwargs)

[Jaymon]

The Orm.testdata method can go through all the fields, if one of the fields is a foreign key, it can then call that Orm's testdata method so it can layer building the objects and handle the dependencies and return a fully populated object, creating all the dependent objects along the way

[Jaymon]

I think https://github.com/Jaymon/prom/blob/master/prom/extras/testdata.py handles this. It allows fields to have a testdata method that it will use.