gql

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App Engine Datastore join with filter on reference

I\'m very new to App Engine Datastore and I could not figure this out. I have these models: class SomeUser(User):[详细]

2023-03-19 19:40 分类：问答
Using List in GQL Filter

How can I make a selection in GQL using a List as filter. I开发者_如何学JAVAf I have the class public class Obj{[详细]

2023-03-18 17:27 分类：问答
Insert thousands entities in a reasonnable time into BigTable

I\'m having some issues when I try to insert the 36k french cities into BigTable. I\'m parsing a CSV file and putting every row into the datastore using this piece of code:[详细]

2023-03-13 02:27 分类：问答
Twitter-ish DB structure in Google App Engine

I\'m trying to create a site which is quite similar to Twitter. Users will be able to post messages. And users will be able to \'follow\' each other. On the homepage, they see the messages from开发者_[详细]

2023-03-11 20:36 分类：问答
OR Condition Return Error in GQL ( Google app engine) Why?

When i use the OR condion in GQL it return error messege tht \"BadQueryError: Pars开发者_开发技巧e Error: Expected no additional symbols at symbol OR . Why?[详细]

2023-03-10 03:31 分类：问答
help with datastore query

Hi I am trying to list playlists wich contain songs by a given arti开发者_如何学编程st for which i have the keyname, my models are:[详细]

2023-03-06 13:58 分类：问答
gql error: BadQueryError: Parse Error: Invalid ORDER BY Property at symbol :3

I\'m getting this error: Parse Error: Invalid ORDER BY Property at symbol :3 Can\'t see what is causing it, if I remove the substitution and add \"date\" it works.[详细]

2023-03-04 14:53 分类：问答
How to find entries which has not empty StringListProperty?

I have a following model in the Google appengine app. class TestModel(db.Model): names = db.StringListProperty(required=False)[详细]

2023-03-02 08:01 分类：问答
How to extract data from two GQL classes?

I have the following 2 classes: class UsersRSS(db.Model): userId = db.IntegerProperty() fileHash = db.StringProperty()[详细]

2023-03-01 14:22 分类：问答
Getting an element by id in Google App Engine's JDO

I have a problem when trying to find a single element by id. The entity class is this: @PersistenceCapable(identityType = IdentityType.APPLICATION)[详细]

2023-02-26 20:28 分类：问答