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https://issues.apache.org/jira/browse/CAY-877?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ari Maniatis updated CAY-877:
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Fix Version/s: (was: Undefined future)
3.1M1
Moving to 3.1 since the generifying of Query will either incorporate some of
these ideas or completely replace this approach.
> 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
> 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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