[jboss-user] [JBoss Seam] - Re: Value is not Valid with <s:entityConverter and equals an

[sergeypk2]

In case anybody is interested, I was hitting a similar problem and here's what was happening in my case:

EntityConverter#getAsObject() calls EntityManager#find(), but EntityManager#find() may return a proxy instead of the real object when there's already a proxy for the object in the session.

Now, there's code in UISelectOne#matchValue (in JSF RI) that checks whether the value it received is in the list of select items:

                //Coerce the item value type before comparing values.
                Class type = value.getClass();
                Object newValue;
                try {
                    newValue = getFacesContext().getApplication().
                        getExpressionFactory().coerceToType(item.getValue(), type);
                } catch (ELException ele) {
...

This coercion doesn't work since value.getClass() is a proxy class, whereas item.getValue() is plain MyObject, so it can't be coerced to the proxy type. Thus the effect is that I can't select some entities out of the list, while others are selectable just fine.

I'm going to implement my own slightly hacked version of EntityStore Seam component to see if I can work around the issue.

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