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From "R V V S S V Raju (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CAY-1163) Moving DBObject to a different DataMap causes reverse relationships to be lost
Date Thu, 19 May 2011 11:26:47 GMT

    [ https://issues.apache.org/jira/browse/CAY-1163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13036114#comment-13036114
] 

R V V S S V Raju commented on CAY-1163:
---------------------------------------

//DataMap->removeDbEntity



public void removeDbEntity(String dbEntityName, boolean clearDependencies) {
        //DbEntity dbEntityToDelete = dbEntityMap.remove(dbEntityName);
        DbEntity dbEntityToDelete = dbEntityMap.get(dbEntityName);
        if (dbEntityToDelete != null && clearDependencies) {
            for (DbEntity dbEnt : this.getDbEntities()) {
                // take a copy since we're going to modify the entity
                for (Relationship rel : new ArrayList<Relationship>(
                        dbEnt.getRelationships())) {
                    if (dbEntityName.equals(rel.getTargetEntityName())) {
                        dbEnt.removeRelationship(rel.getName());

                    }
                }
                
                 for (Relationship rel : new ArrayList<Relationship>(
                        dbEntityToDelete.getRelationships())) {
                    dbEntityToDelete.removeRelationship(rel.getName());
                }
            }

            // Remove all obj relationships referencing removed DbRelationships.
            for (ObjEntity objEnt : this.getObjEntities()) {
                if (dbEntityToDelete.getName().equals(objEnt.getDbEntityName())) {
                    for (Relationship rel : new ArrayList<Relationship>(
                            objEnt.getRelationships())) {
                        objEnt.removeRelationship(rel.getName());
                    }
                    objEnt.clearDbMapping();
                }
                else {
                    for (Relationship rel : objEnt.getRelationships()) {
                        for (DbRelationship dbRel : ((ObjRelationship) rel)
                                .getDbRelationships()) {
                            if (dbRel.getTargetEntity().equals(dbEntityToDelete)) {
                                //((ObjRelationship) rel).clearDbRelationships();
                                objEnt.removeRelationship(dbRel.getName());
                                break;
                            }
                        }
                    }
                    
                }
                
            }
            
        }
        dbEntityMap.remove(dbEntityName);
    }


//DataMap->removeObjEntity()

public void removeObjEntity(String objEntityName, boolean clearDependencies) {
        ObjEntity entity = objEntityMap.remove(objEntityName);

        if (entity != null && clearDependencies) {

            // remove relationships that point to this entity
            for (ObjEntity ent : getObjEntities()) {
                // take a copy since we're going to modify the entity
                for (Relationship relationship : new ArrayList<Relationship>(
                        ent.getRelationships())) {
                    if (objEntityName.equals(relationship.getTargetEntityName())) {
                        ent.removeRelationship(relationship.getName());
                    }
                }
                
                for (Relationship relationship : new ArrayList<Relationship>(
                        entity.getRelationships())) {
                    entity.removeRelationship(relationship.getName());
                }

            }
        }
    }

> Moving DBObject to a different DataMap causes reverse relationships to be lost
> ------------------------------------------------------------------------------
>
>                 Key: CAY-1163
>                 URL: https://issues.apache.org/jira/browse/CAY-1163
>             Project: Cayenne
>          Issue Type: Bug
>          Components: Modeler
>    Affects Versions: 3.0M5
>         Environment: CayenneModeller 3.0M5 under Mac OS X 10.5.6 java version "1.5.0_16"
>            Reporter: Stephen Winnall
>            Assignee: Andrey Razumovsky
>
> 1) create a new project
> 2) create dataMap OneMap
> 3) create dataMap TwoMap
> 4) in OneMap, create dbEntity Ent1 with attribute One : INTEGER
> 5) in OneMap, create dbEntity Ent2 with attribute Two : INTEGER
> 6) create a relationship and reverse relationship between Ent1.One and Ent2.Two
> 7) move Ent2 into TwoMap using cut and paste
> 8) observe that the relationship for Ent1 has been zapped, though the reverse relationship
for Ent2 still exists
> This behaviour leads to missing relationships in the generated schema.

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