| A long day, and my brain is not computing this one. Either it is obvious and I cannot see it, or my solution at the end is one of a number of complicated ways to do the non-obvious .... either way, someone here probably has seen this before.
I had to do some refactoring and kill one side of a toMany that was just getting too big to have anymore.
The last artifact I have left is an EOQualifier for a two-hop keyPath and my brain is just not giving it to me if it is obvious
1) Before I got rid of one side of the huge relationship I had this:
CTMediaTemplate <-->> CTMessage <<--> CTJob
2) After refactoring out the toMany of the first entity shown above to the second entity, I have this:
CTMediaTemplate <----- CTMessage <<--> CTJob
The problem: I had a method in CTJob that returned a fetch spec for the CTMediaTemplate.
public ERXFetchSpecification<CTMediaTemplate> fetchSpecificationForMediaTemplates() { EOQualifier q = CTMediaTemplate.XKEY_MESSAGES.append(CTMessage.XKEY_JOB).eq(this); ERXFetchSpecification<CTMediaTemplate> fs = new ERXFetchSpecification<CTMediaTemplate>(CTMediaTemplate.ENTITY_NAME, q, null,true,false,null); return fs; }
FYI, the qualifier translated into normal plain WO would be sth like this: q = new EOKeyValueQualifier( "messages.job", EOQualifier.QualifierOperatorEquals, this );
So my "messages" relationship from CTMediaTemplate to CTMessage is now gone and so cannot be used in the qualifier keypath. How do I qualify the CTMediaTemplate objects now without that part of the keypath?
My (possibly overkill) solution I was thinking of was actually creating a flattened toMany (which feels dirty) in the EOModel like this
CTMediaTemplate <<-------(flattened relationship in CTJob: "mediaTemplates" = "messages.mediaTemplate") -------- CTJob
... just so I could do something like the following in a CTJob instance to create the qualifier using EORelationship.qualifierWithSourceRow(...) ..... but it seems like there might be an easier way that I am not seeing that would avoid me needing to create that flattened toMany from CTJob to CTMediaTemplate which feels sloppy .... any suggestions?
<snip> String aKey = "mediaTemplates"; this.willRead(); EOEntity anEntity = entity(); EORelationship aRelationship = anEntity.relationshipNamed(aKey); EOEditingContext anEditingContext = this.editingContext(); EOGlobalID aGlobalID = anEditingContext.globalIDForObject(this); String aModelName = anEntity.model().name(); EODatabaseContext aDatabaseContext = EOUtilities.databaseContextForModelNamed(anEditingContext, aModelName); NSDictionary aRow = null; aDatabaseContext.lock(); try { aRow = aDatabaseContext.snapshotForGlobalID(aGlobalID); } finally { aDatabaseContext.unlock(); }
EOQualifier q = aRelationship.qualifierWithSourceRow(aRow); </snip> |