Hello,
I am building a project where I have a datamodel as shown below.
A {
@Transient
B b;
@Transient
C c;
}
//there are few more params, just showing the basic structure
B {
String title;
Set<B> child;
}
C {
//set of keys is stored
Set<D> d;
Set<Long> count;
}
D {
String name;
String country;
}
As I am using Spring-Roo for generating my entites it automatically only
store only keys/ primary id's of the referencing entities.
All entities are rendered using custom widgets. I am using Editor frramework
to edit the entities.
On my parent View (which displays Entity A), I have a save button, on click
I persists all the children (B, C) and the parent Currently I make
individual calls to persist each entity set in the datastore.
I have two challenges
1. Can I combine the request to persist all of these entities into a single
call using entitygroups? Can this be achieved using RequestContext &
RequestFactory framework. Any advice/ suggestions would be much appreciated
2. If I go with my current approach of saving all entities separately, even
though it works well, the implementation becomes messy when I have to
re-edit the Objects. for example, I had to display details of Object A in my
home page, so I fetched A from datastore, while doing so I used the with
clause as below
requestContext.findAllA().with("b")
now if I pass this retrieved proxy to the editor framework, it not only sets
the object A to edit mode, it also sets the Object B to edit. Without entity
groups, I cannot persist any changes to B along with A. The only way for me
to save B (using my current approach to save entities separately) is to use
AutoBeanUtils and freeze the entity B, dis-associate the requestContext
reference and re-edit it using a different requestContext.
This approach works, but i feel its messy and there should be a better and
cleaner approach to achieve data persistance.
Appreciate all your advice/ suggestions.
Thanks
Ashwin
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