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From "Ari Maniatis (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CAY-877) ROR ActiveRecord like interface for Apache Cayenne
Date Wed, 06 Jan 2010 11:48:55 GMT

     [ https://issues.apache.org/jira/browse/CAY-877?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ari Maniatis updated CAY-877:
-----------------------------

    Component/s: Core Library

> ROR ActiveRecord like interface for Apache Cayenne 
> ---------------------------------------------------
>
>                 Key: CAY-877
>                 URL: https://issues.apache.org/jira/browse/CAY-877
>             Project: Cayenne
>          Issue Type: New Feature
>          Components: Core Library
>    Affects Versions: 2.0 branch
>            Reporter: David Marko
>            Assignee: Andrus Adamchik
>            Priority: Minor
>             Fix For: 3.1M1
>
>         Attachments: EntityManager.java, Query.java
>
>
> ROR ActiveRecord  like interface for Cayenne. Solution tries to bring alternative syntax
for working with Apache Cayenne subsystem. Though its working its still subject of discussion
and improvement. My idea is not to create other AR like ORM in JAVA  but rather create AR
like interface for existing ORM.  I expect discussion on additional methods that will conform
the concept.
> The solution requires Java 5 as generics and some other features are being used. Here
are just a few code snippets of how it can be used.
> Syntax examples:
> EntityManager em=new EntityManager();
> em.setContext(DataContext.createDataContext());
> // create and save object
> Contact contact=em.create(Contact.class);
> em.saveChanges();
> // find object by id
> Contact contact=em.findById(Contact.class, id);
> // find object by property
> Contact contact=em.findFirstByProperty(Contact.class, "username",
> form.getFieldValue("username"));
> // find many objects by property
> List contacts=em.findAllByProperty(Contact.class, "subdomain.name", "subdomain");
> // find objects based on user defined query
> List contacts=em.findAllByQuery(Contact.class,
> 				Query.select().where("subdomain = $subdomain and age > $age")
> 				              .param("subdomain", "agh")
>                                               .param("age", 18)
> 				              .order("lastname",true)
>                                               .offset(200)
>                                               .limit(10)
> 				              .include(Contact.ROLE_ARRAY_PROPERTY));
> // count items per invoice
> List counts=em.count(Item.class, "invoice_id")

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