jdo

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JDO query help (find recipes by ingredients)

I need some help with a JDO query. I have the following Entities: recipe: @PersistenceCapable class Recipe{[详细]

2023-03-08 08:00 分类：问答
JDO - HashMap within an embedded Class

Are you able to store a HashMap within an embedded class on App Engine? I have the following Class: @Persistent(serialized = \"true\")[详细]

2023-03-08 07:53 分类：问答
JDO Query ordering issue

I have a JDO query which filters on two properties of a \"Person\" entity, lets call them \"age\" and开发者_开发知识库 \"height\". I wish to order the results by the Persons \"score\". However, due to[详细]

2023-03-08 01:48 分类：问答
Validating jdoconfig with incorrect url

I am using jdo and configuring the persistence manager with jdoconfig.xml However everywhere I find documentation about jdoconfig.xml it states that http://java.sun.com/xml/ns/jdo/jdoconfig 开发者_C百[详细]

2023-03-07 03:42 分类：问答
How to delete a column (attribute) from a GAE datastore?

I have a persistent class stored in a GAE datastore. I have removed one of the attributes from the class. The new records in this table show a value <none> for the removed attribute. But is there a[详细]

2023-03-06 09:16 分类：问答
One to many relationship in app engine

I had two entities One is DataBase and the Other id Digraph here is the code package com.g开发者_如何学JAVAoogle.GPtest.server;[详细]

2023-03-06 05:33 分类：问答
Migrating fields in JDO

We are using JDO in one of our projects. This has been running for quite a while and naturally we need to change the model a bit.[详细]

2023-03-06 04:26 分类：问答
select certain "column" for JDO entity

I have a entity in the appengine datastore called DataBase wh开发者_JAVA技巧ich contains some attributes or columns or what ever it is named in JDO,I want to select only some columns from that entity[详细]

2023-03-05 07:15 分类：问答
What's a more affordable hosting option for a Java/JDO app built on (the formerly free) App Engine? [closed]

Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow.[详细]

2023-03-04 08:31 分类：问答
What's the correct way for persistent storage of an inner class in GAE/J JDO?

From GAE\'s documentation, I can read this: The entity\'s kind is derived from the simple name of the class (inner classes use the $ path without the package name).[详细]

2023-03-01 20:59 分类：问答