On 19/04/2017 8:13 AM, Rich Shepard wrote:
Converting from the postgres schema to a Django models.py for my first
Django project. Most of the syntax (64 lines in the file) should be
correct,
but there are two conditions that I have not found how to handle.
First, a couple of classes have primary keys with three fields. I know
there's a models.PrimaryKey but haven't found an example of how to apply
that to a field that foreign key fields.
You probably need a single FK plus a meta option of unique_together
https://docs.djangoproject.com/en/1.8/ref/models/options/#unique-together
Second, I have a couple of fields with postgres check constraints; that
is, valid data is restricted to a list of strings. I've not found a
Django
model field validator teaching me how to write this.
Use the model's clean() method ...
https://docs.djangoproject.com/en/1.8/ref/models/instances/#django.db.models.Model.clean
Cheers
Mike
If you would be willing to look at the module, show me how to write the
two conditions above, and check syntax on the all 5 classes in it I will
send you the file off the mail list.
Rich
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