Thursday, September 8, 2011

Trouble expressing a query in the ORM

Hi.

I have a query I am trying to perform in the ORM and I'm not sure how to do it.

I have two models: Target and Property with a one-to-many relationship. One Target can have many Properties.

I want to list all targets along with their latest properties (as stored under Property.export_date) sorted by fields on Property.

So if I have this simplified model:

Target
  - name
  - t1
  - t2

Property
  - fk_to_target
  - export_date
  - p1
  - p2

I want to have a list of record each having [name, t1, t2, export_date, p1, p2] with every target only being once in the list with its latest property.

How do I make this happen in the ORM?

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