What can cause this difference between prod and dev?

Question

Same code, in production don't work while in development yes.

models:

class Comput(ndb.Model):
    @staticmethod
    def membership(user):
        q = ndb.gql("SELECT * FROM Members WHERE member = :1", user)
        result = q.fetch()
        return [m.comput.get() for m in result]
        #return [m.comput.get() for m in q] #same issue (dev yes, prod no)

class Members(ndb.Model):
    comput = ndb.KeyProperty(kind=Comput)
    member = ndb.UserProperty()

handler:

comput_list = Comput.membership(users.get_current_user())

template:

{% for comput in comput_list %}
    <tr onclick="location.href='/comput?id={$ comput.key.id() $}'">

Traceback (only in production):

UndefinedError: 'None' has no attribute 'key'

This appears even when comput_list have entities.

update: No autogenerate index for Members, I tried to add manually but nothing changes

Just to be sure: What code line throws the error? And do you have data in the table in production? — Mikkel Gadegaard, Jun 30 '12 at 18:12
seems that comput_list return `None`. Anyway I expected empty templates, no errors — Gianni Di Noia, Jun 30 '12 at 18:16
Yeah that was my guess and why I asked about data in production. — Mikkel Gadegaard, Jul 01 '12 at 10:59

score 1 · Accepted Answer · answered Jul 01 '12 at 12:58

1

Looks like one of your Members objects has None for its comput property. I would use the production data viewer (or add a log statements) to find which member it is.

answered Jul 01 '12 at 12:58

Jesse Rusak

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Yes! The function that delete the Comput entities don't delete also the referenced Members entities. Then I had a Members entity with a comput property that link to a missed Comput entity. – Gianni Di Noia Jul 01 '12 at 13:19

What can cause this difference between prod and dev?

1 Answers1