> If I delete the entity 'West Coast' station entity, will all existing
> shifts with "ancestor == ndb.Key(Station, 'West Coast')" automatically get
> deleted?
>
>
GAE Datastore don't have any automatic triggers.
You can create your own triggers and remove redundant records. Google for
"GAE
Thank you for the help, I am learning a lot today!
If I delete the entity 'West Coast' station entity, will all existing
shifts with "ancestor == ndb.Key(Station, 'West Coast')" automatically get
deleted?
I want to prevent data store leaks.
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Hi, Ryan.
> I'm working on a server project for a petrol station company.
> I have this station class.
>
> class Station(modelpy.Model):
> shifts = ndb.JsonProperty()
>
> The Station's key's id is the name of a station.
> Here are the names of the actual stations: "West Coast", "Woodlands",
>
> Then, access to shifts:
>
> west_coast_shifts = Station.query(ancestor=ndb.Key(Station, 'West Coast'))
>
oops
west_coast_shifts = Shifts.query(ancestor=ndb.Key(Station, 'West Coast'))
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Dear Anons,
First of all thank you for the replies, your care is greatly, greatly
appreciated!
> # one item into ndb
> apple_count = len(Fruit.query().fetch(100))
> self.assertEqual(apple_count, 1)
>
After reading this, I've realised that fruits analogy is a wrong example of
the actual issue
use a pre put hook to do your checking:
class Fruit(ndb.Model):
name = ndb.StringProperty(required=True)
color = ndb.StringProperty(required=True)
taste = ndb.StringProperty(required=True)
def _pre_put_hook(self):
On Thursday, January 19, 2017 at 5:39:56 AM UTC+2,
Hi Ryan Ang Wei En
class Fruit(ndb.Model):
> name = ndb.StringProperty(required=True)
> color = ndb.StringProperty(required=True)
> taste = ndb.StringProperty(required=True)
>
Dont use a 'name' field for ID. There is a 'id' keyword for this purpose.
...
class Fruit(ndb.Model):
color
