> What semantically is "isFresh" attribute? Is it a some business logic > attibute, or simple "autoset" variable, like timestamp etc.?
No its business logic. In fact it defines the view-rights for the specific apples to the plums :-) > If former, you cannot live without ApplePlum ObjEntity. Is the problem > then in just setting its default value? Then you can simply set it at > database level. OK, I will try to change my mind on this one. I have hoped I could somehow access the intermediate object. THanks! Cheers Christian > If the default value is dynamic, like timestamp, you can try intercept > Cayenne's generating of queries: > http://cayenne.apache.org/doc30/custom-batchquerybuilder-factory.html > > 2011/2/18 Christian Grobmeier <grobme...@gmail.com>: >> Hello, >> >> I have the following scenario: >> >> Apple 1 -> n ApplePlum n : 1 Plum >> >> I want store an additional flag in ApplePlum (lets say isFresh = true/false >> >> How can I do this? I know I should not use flattened relations, but >> they are so nice, I would like to keep them. At least it would lead to >> the Method getApplePlum->getPlum which is not very neat. >> >> In order to do so I have thought I could create a custom method in my >> Apple class, which copies some code from the _Apple class. >> >> Like this: >> >> public void addToAppleAsFreshPlum(Plum value) { >> String relName = "ApplePlum"; >> if (value == null) { >> throw new NullPointerException("Attempt to add null target >> DataObject."); >> } >> >> willConnect(relName, value); >> Object holder = readProperty("ApplePlum"); >> >> // Now I would like to get the object created by the holder: >> ((ApplePlum)holder).setFresh(true); >> >> getObjectContext().propertyChanged(this, relName, null, value); >> >> if (holder instanceof Collection) { >> ((Collection<Object>) holder).add(value); >> } >> else if (holder instanceof Map) { >> ((Map<Object, Object>) holder).put(getMapKey(relName, >> value), value); >> } >> >> setReverseRelationship(relName, value); >> } >> >> Of course this does not work. I wonder if there is another option for >> me? Any ideas? >> >> Thanks in advance >> Christian >> > > > > -- > Andrey > -- http://www.grobmeier.de
