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hibernate one to many annotation foreign key null

原文 2017-07-25 08:07:38 8 1 java/ hibernate/ hibernate-mapping/ hibernate-onetomany

I have two entities LR.java and LI.java . One request may have more than one items on it.

After the execution of this method the lR is always null inside the item table. What I am doing wrong here? Any suggestions

1 answers

You defined a bidirectional "manytoone" association, so it's develepoer's responsability to keep consistent both sides of the association (that is: loanRequest and loanItems).

You should set the field loanRequest of the Loanitem entity to point to "right" LoanRequest. Do you so in the addLoanItem ?

Beside, unless you really need to "navigate" from one entity to the other and backward I suggest you to use unidirectional association, they are far more manageable and less prone to errors like this.

Anyway, @XtremeBaumer is right, constructor of LoanItem should be empty.

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hibernate one to many annotation foreign key null

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1 answers

solution1 0 2017-07-25 09:45:49

solution1
0 2017-07-25 09:45:49