On Nov 5, 2007, at 2:07 PM, Patrick Linskey wrote:
What happens if you just use a @OneToOne instead of the @ManyToOne?
The problem is that it's not OneToOne
Can you describe this in more detail? (I.e., in terms of what your
schema looks like.)
Well, there's a Show table, w/ a pk, and the Show class really has no
interest in the InputFile class.
There's an inputfile table, w/ a pk. The InputFile class does have a
ManyToOne with Show :
In real world problem, each Show we have on the platform is a
singleton ("I dream of Genie Epsode 11"), but a content owner may
give us updated source material - say they have a new transcoding.
We want to add a new InputFile into the database, point it at the
Show, but the Show itself doesn't care about it's source.
Does that help?
eir
-Patrick
On Nov 5, 2007 10:40 AM, Geir Magnusson Jr. <[EMAIL PROTECTED]> wrote:
On Nov 5, 2007, at 12:44 PM, Patrick Linskey wrote:
I'm a newbie, so I don't quite grok the question. Show itself
doesn't have any references to InputFile.
Aha! IIRC, @ManyToOne is only meaningful when used as the back
side of
a @OneToMany.
We don't have that. There are reasons, and its intentional.
What happens if you just use a @OneToOne instead of the @ManyToOne?
The problem is that it's not OneToOne
-Patrick
On Nov 5, 2007 9:16 AM, Geir Magnusson Jr. <[EMAIL PROTECTED]> wrote:
On Nov 5, 2007, at 11:48 AM, Patrick Linskey wrote:
Hi,
What does the other side of the relation look like?
I'm a newbie, so I don't quite grok the question. Show itself
doesn't have any references to InputFile.
Also, what does
the Show class look like?
in what way? Show is a subclass in a JOINED inheritance
strategy, if
that makes any difference.
geir
-Patrick
On Nov 5, 2007 8:08 AM, Geir Magnusson Jr. <[EMAIL PROTECTED]> wrote:
I'm a newbie, so forgive me if I'm not asking the question the
right
way.
I have a join table in my DB :
+-------------+------------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------------+------------------+------+-----+---------+-------+
| showId | int(11) unsigned | NO | PRI | | |
| inputFileId | int(11) unsigned | NO | PRI | | |
+-------------+------------------+------+-----+---------+-------+
where showId and inputFileID are PKs in the show table and
inputfile
table.
In my code for the InputFile class :
@ManyToOne
@JoinTable(name="Show2InputFile",
joinColumns = @JoinColumn(name="inputFileId"),
inverseJoinColumns = @JoinColumn(name="showId"))
public Show getShow() {
return show;
}
When JPA is instrumenting my classes, it complains :
Caused by: <openjpa-1.1.0-SNAPSHOT-r420667:588533 fatal user
error>
org.apache.openjpa.persistence.ArgumentException: You have
supplied
columns for
"com.joost.model.logistics.InputFile.show<element:class
java.lang.Object>", but this mapping cannot have columns in this
context.
I don't quite understand the error. I use this same thing
elsewhere
(I think) w/o a problem. Can someone give me a hint?
geir
--
Patrick Linskey
202 669 5907
--
Patrick Linskey
202 669 5907
--
Patrick Linskey
202 669 5907
