I have a SITE, and a SHIPTYPE table. These two table have a many-to-may
relationship (the cross reference table is SHIPTYPE_X_SITE). I created the
corresponding entities Site and ShipType. For the creation of ShipType, my UI
has ShipType related fields as well as a list of sites. Therefore,ShipType has
a collection of Sites:
@ManyToMany(fetch=FetchType.LAZY)
@JoinTable(name="SHIPTYPE_X_SITE",
[EMAIL
PROTECTED](name="SHIP_TYPE_CD",referencedColumnName="SHIP_TYP_CD")},
[EMAIL
PROTECTED](name="ST_SITE_ID",referencedColumnName="SITE_ID")})
private List sites;
and the cross reference records are saved when I save ShipType. That is good.
On the other side, the creation of Site just have some basic Site related
fields. There is no list of ShipTYPES in the UI.
However, I do have the need to retrieve list of ShipTypes associated with a
site sometimes. So I added following association to Site entity bean:
@ManyToMany(fetch=FetchType.LAZY)
@JoinTable(name="SHIPTYPE_X_SITE",
[EMAIL
PROTECTED](name="ST_SITE_ID",referencedColumnName="SITE_ID")},
[EMAIL
PROTECTED](name="SHIP_TYPE_CD",referencedColumnName="SHIP_TYP_CD")})
private List shipTypes;
Once I did that, if I modify Site and save (collection shipTypes is null), all
the cross reference records are gone for the given site. My question is how can
I make the Site bean has the association, but not doing the cascading? Thank
you very much for you help.
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