org.hibernate.QueryException: illegal attempt to dereference collection
60,890
Solution 1
billProductSet
is a Collection
.
As such, it does not have an attribute named product
.
Product
is an attribute of the elements of this Collection
.
You can fix the issue by joining the collection instead of dereferencing it:
SELECT count(*)
FROM BillDetails bd
JOIN bd.billProductSet bps
WHERE bd.client.id = 1
AND bps.product.id = 1002
Solution 2
because billProduct is one to many mapping and there is many billProduct entity from one BillDetails entity you can't dereference it in query.you must join BillDetails model to billProduct and filter result with where cluase.
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xrcwrn
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Updated on July 05, 2022Comments
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xrcwrn almost 2 years
I am trying following hql query to execute
SELECT count(*) FROM BillDetails as bd WHERE bd.billProductSet.product.id = 1002 AND bd.client.id = 1
But it is showing
org.hibernate.QueryException: illegal attempt to dereference collection [billdetail0_.bill_no.billProductSet] with element property reference [product] [select count(*) from iland.hbm.BillDetails as bd where bd.billProductSet.product.id=1001 and bd.client.id=1] at org.hibernate.hql.ast.tree.DotNode$1.buildIllegalCollectionDereferenceException(DotNode.java:68) at org.hibernate.hql.ast.tree.DotNode.checkLhsIsNotCollection(DotNode.java:558)
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Stony over 9 yearsIt doesn't work in my testing, if billProductSet is got be @JoinTable, and the relation is ManyToMany.
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Andrea Ligios almost 9 years@Stony It does work with
@JoinTable
and@ManyToMany
. I've that running right now. -
Cavaleiro almost 4 yearsJust for reference: in my case I was already doing the join of the collection but without giving it an alias it won't work. Thanks!