save parent & child simoltaneously

[vata2999]

Hi,
I got stuck in situation that need save parent/child simoltaneously but
i come up with nothing can you suggest me an idea ?
PS : my main problem is when i have more than one child
thanks in advanced

[vata2999]

Maybe it's better to change my question
How can I inject same context variable twice in actionBean ?

@Name("relevent")
@Entity
class Relevent

actionBean.java

@In
Relevent relevent;
@In
Relevent relevent2; //unknown context variable name

form.xhtml

h:inputText value{relevent.name} 
h:inputText value{relevent2.name}  // this cause the problem

[kragoth]

You cannot inject multiple instances of a component.

Instead of trying to inject 2 children, inject the parent and then reference the collection containing the children.

Then as long as you have a cascading relationship merging the parent will save both children. If it is not a cascading relationship then manually call persist on each child. (Assuming flush mode is manual).

[vata2999]

Thanks tim for your advice You cannot inject multiple instances of a component
as i know seam-gen using java reflection to create instance of entity and bind it to a from
with entity.instance.property so i tried to make a new instance of my relevent class in actionbean as below

@Transactional
public Relevent getRelevent2(){
return Relevent.class.newInstance();
}

that works perfectly but after i bind it to a form like

h:inputText value=actionBeanName.relevent2.property

and submit form  all property returns null
any other idea ?

[lvdberg]

Hi,

why don't you use the seam container to do this for you ? So something like:

<component      auto-create="true" 
          class="yourpackage.Relevent"
          name="relevent1" />

<component      auto-create="true" 
          class="yourpackage.Relevent"
          name="relevent2" />

Leo

[vata2999]

That was as a piece of cake! :-D you save my day
Thanks Leo

[kragoth]

Leo van den Berg wrote on Oct 28, 2010 06:43:


Hi,

why don't you use the seam container to do this for you ? So something like:

<component      auto-create="true" 
          class="yourpackage.Relevent"
          name="relevent1" />

<component      auto-create="true" 
          class="yourpackage.Relevent"
          name="relevent2" />

Leo

I did not know that trick! Nice one Leo. :)