gqlquery

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Google App Engine python, GQL, select only one column from datastore

Im trying to pull only one column from a datastore table I have a Books model with id, key, title, author, isbn and price[详细]

2023-03-31 08:27 分类：问答
Why does this Gql Query return None? (Using Python and App Engine)

I am creating a number guessing game to help myself learn how to use Google\'s App Engine. I store the current answer as a random number in the datastore. Each time the user guesses I want to pull the[详细]

2023-03-28 23:54 分类：问答
Loop over GqlQuery Fields, App Engine, Python

I want to output all attributes and values of the following GqlQuery: benchmarks = db.GqlQuery(\"SELE开发者_开发知识库CT * FROM Benchmarks\")[详细]

2023-03-22 12:41 分类：问答
Google App Engine - Datastore - GQL Query

class ProjectCategory(db.Model): name = db.StringProperty(\"Category name\", required = True) def __str__(self):[详细]

2023-03-20 12:39 分类：问答
Select Objects with null values

How can I select only objects with null values in GQL. I have a object that for a new version of my software I include a LastUpdate fields, and I want to update only the oldest updated object, but whe[详细]

2023-03-20 05:32 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
Google app engine - Query only for a field

Note: this example is just representative of the problem, not a real use case I would like to know if I have a certain objects for example Car and CarCategory:[详细]

2023-03-16 16:50 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
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