CODEWITHSUNDEEP
pythongoogle-app-enginekeygoogle-cloud-datastore
user3084959
user3084959

Reputation: 15

Retrieve key from automatically assigned ID which has been passed through URL in GAE, using ndb and python

I've been struggling with this for hours and tried everything!

So basically

I have a class called City:

class City(ndb.Model):
    _parent = None
    city = ndb.StringProperty(required=True)
    created = ndb.DateTimeProperty(auto_now_add=True)

When i make a new city, it is given an automatic ID, such as 6438740092256256

Later on i want to add a Restaurant entity to this city as a child. So I have passed the city ID in the url, like this:

http://www.edkjfsk.com/addrestaurant/6438740092256256

which leads to this bit of code

class PostRestaurant(webapp2.RequestHandler):
    def post(self, resource):
        key = ????

where resource is 6438740092256256

What i want to do is to be able to retrieve the key using the 6438740092256256 from the url. However every single approach i have tried results in an unknown error.

Ive tried everything, including key = :

City.get_by_id(int(resource))

ndb.Key(City, resource).get()

ndb.Key('City', int(resource))

etc.

Upvotes: 1

Views: 83

Answers (1)

pnv
pnv

Reputation: 3135

You are getting urlsafe string here.

this_key = ndb.Key(urlsafe=resource)
query_result_as_entity = this_key.get()

After converting urlsafe string to key, you can just do get() on it.

Upvotes: 1

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