[jboss-user] [EJB 3.0 Users] - Re: unidirectional and bidirectional relationship
amira88
do-not-reply at jboss.com
Wed Dec 9 12:37:15 EST 2009
"Wolfgang Knauf" wrote : Hi,
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| assume that you have a relation "Person has many addresses" with two entities "Person" and "Address".
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| If you declare a bidirectional relationship, your code can navigate from Person to Address, and from Adress to Person.
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| With a unidirectional relationship, your code can navigate only from one side to the other. E.g. you can get the addresses of a person, but you cannot get the person of an address.
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| The database representation of the relationship is not affected by your unidirectional/bidirectional decision. This defines only, how the code side looks like.
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| Hope this helps
|
| Wolfgang
tHANK U so much sir ,
Now i can see the difference but i have a new question another time, i'm developping an oaw project so after generating
the code i have to build tables, That's why i used jboss ,but when i wanna add the oaw project in the server(add and remove option by right click on the sever ),i can not find the name of the oaw project ,So i created a new ejb3 project and i copy and paste the generated class into it finally i added
the annotation and the relation ships into entities is it a good idea!!!
Because My collegues add annotation (ejb3 code)in the Template!!
That's why i'm wondering ,and I'm afraid if made a mistake!!
What do you think Sir Knauf!!
Viele Danke für Ihre Hilfe!!
Thank you for ur help
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