Suppose I have the following database:

class Model1(db.Model):
  att1 = db.IntegerProperty()

class Model2(db.Model):
  model1 = db.ReferenceProperty(Model1, collection_name='model2s')
  string = db.StringProperty()

Suppose I create a few Model1s and several Model2s, then have the
following code:

model1s = Model1.all()
for model1 in model1s:
  for model2 in model1.model2s:
    self.response.out.write(model2.string)

Does model1.model2s cause a query to be run? I would imagine so. Is
this query run every time I ask for model1.model2s, or is it
automatically cached?

Any information on this would be helpful.

Thanks,
Paddy Foran

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