Are sequential blocks more likely to be “empty” if solved by the same entity?


I have been getting an error while trying to update a list of entities containing persisted entity and detached entity both (newly created entity) into my db using jpa2.0. My entity contains internal entities which are giving an error (mentioned in the title) when merging the data:

Class superclass{ private A a; private string name; //getter setters here... } Class A{ private long id; @onetoone(cascade=CascadeType.All, fetch=FetchType.Eager) private B b; @onetoone(cascade=CascadeType.All, fetch=FetchType.Eager) private C c; //getter setters here... } Class Dao{ daoInsert(superclass x){ em.merge(x); } }

I want any entity sent for persisting to be merged into the db.

Hibernate does provide solution for this by adding the following to the persistence.xml

Is there something I can do in jpa same as hibernate.

Please do not suggest to find the entity using em.find() and then update manually because I need both entities the persisted...

0 0

I have a "grant" content type, and a "foundation" organization type(organization entities provided by Redhen modules). Foundations offer grants, so every grant links to a foundation using an entity reference field. When viewing a grant's page, a listing of the foundation's other grants should be displayed in the sidebar.

After trying so many configurations of contextual filters with and without relationships, the view block finally worked... but only on one page:

On that page for "sample grant" there's a view in the sidebar that lists "another grant" and they are indeed both offered the the same foundation/organization.

But if you click on "another grant" the block view lists two grants offered by a different foundation, and if you go to any other grants page then the block view doesn't show up at all.

Currently the contextual filter (using entity reference field) is providing...

0 0

This section covers EJB 3.0 (aka Java Persistence) entity annotations and Hibernate-specific extensions.

EJB3 entities are plain POJOs. Actually they represent the exact same concept as the Hibernate persistent entities. Their mappings are defined through JDK 5.0 annotations (an XML descriptor syntax for overriding is defined in the EJB3 specification). Annotations can be split in two categories, the logical mapping annotations (allowing you to describe the object model, the class associations, etc.) and the physical mapping annotations (describing the physical schema, tables, columns, indexes, etc). We will mix annotations from both categories in the following code examples.

EJB3 annotations are in the javax.persistence.* package. Most JDK 5 compliant IDE (like Eclipse, IntelliJ IDEA and Netbeans) can autocomplete annotation interfaces and attributes for you (even without a specific "EJB3" module, since EJB3 annotations are plain JDK 5...

0 0

This tutorial will teach you how to create in Drupal 7 a Related Content block that shows content related to the node that is being rendered on the page. To do this you'll need the Entity Reference and the Views modules. The relation between the nodes is made by a reference between the two, but can also be by sharing the same taxonomy terms.

So, you do this in two steps:

Step 1:

First, you logically need at least 2 Content Types: one for the main node and another as reference nodes. Once you know what you want to reference to what, you have to install the Entity Reference module.

For the purpose of this tutorial, I will refer to the main Content Type as Article CT and the referenced content as Related Content CT.
Once you installed the Entity Reference module, add a new field to your Article CT. Go to Structure – Content Types – Article (or whatever your Content Type is) – Manage Fields – Add New Field – Entity Reference. For the widget, I used...

0 0