Hi
I am new to cayenne and I built my project. I get the following error:
Exception in thread "main" java.lang.IllegalArgumentException: Class is not
mapped with Cayenne: org.example.cayenne.persistent.Student at
org.apache.cayenne.access.DataContext.newObject(DataContext.java:689) at
org.example.c
Sheldon wrote
>
> If I specify a pageSize than I get any PK of objects.
> I want, that I know a list of PKs and get their Objects.
>
> Sheldon
>
You can add a NamedQuery[1] in the modeler, for example:
Then [2]:
>>> You have to inflate your cache anew from DB in every transaction.
>>> You don't have any data when you start.
>>
>> Sure, that's unavoidable if you want to do optimistic locking.
>
> You can do optimistic locking with cached data just as well. It
> doesn't have to come from the same transactio
Hello Aristedes,
I have just found out the problem I had two DataObjects, one inherited
from other but with no other difference. So Cayenne got confused and gave
me versions of the same object on the Parent object and also in the Child
Object on different contexts. The child was from the conte
On 2/04/12 5:49 PM, Sheldon wrote:
If I specify a pageSize than I get any PK of objects.
I want, that I know a list of PKs and get their Objects.
I suspect that the suggestion here is to think about using Cayenne in a different way.
What you are trying to do often suggests that you are working
Hi Sheldon;
You can just create an EJBQLQuery that extracts those specific columns
(expressed as entity attributes' names) and then run the query and
you'll pull back that data. A crude example of such a query;
"SELECT o." + Foo.CODE_PROPERTY+" FROM "+Foo.class.getSimpleName()+" o
WHERE o."
What I mean is,
if I have a Table with n columns (col1, col2, col3 ...) and want load only
the value of col1 and col3 (without loading col2 and the others).
Is this example possible?
Sheldon
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If I specify a pageSize than I get any PK of objects.
I want, that I know a list of PKs and get their Objects.
Sheldon
--
View this message in context:
http://cayenne.195.n3.nabble.com/select-over-PKs-tp3870305p3876993.html
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