modelOptions in DelegateOperation should forward to the one from...

the delegated operation
- to make `modelOptions` always available in static query hooks, also when using upsertGraph(AndFetch) and patchAndFetchById
- also fix the query builder being executed on the model built from a graph instead of the source(current) model - the modelOptions.old should contain the old values read from db, not the new ones from the graph.

Author: falkenhawk

lib/queryBuilder/graph/patch/GraphPatchAction.js

@@ -231,7 +231,10 @@ class GraphPatchAction extends GraphAction {
   }
 
   _createRootBuilder(node) {
-    return node.obj.$query();
+    const currentNode = this.currentGraph.nodeForNode(node);
+    const currentObj = currentNode && currentNode.obj;
+
+    return currentObj ? currentObj.$query() : node.obj.$query();
   }
 }
 

lib/queryBuilder/operations/DelegateOperation.js

@@ -11,6 +11,10 @@ class DelegateOperation extends QueryBuilderOperation {
     this.delegate = opt.delegate;
   }
 
+  get modelOptions() {
+    return this.delegate.modelOptions;
+  }
+
   is(OperationClass) {
     return super.is(OperationClass) || this.delegate.is(OperationClass);
   }

tests/integration/staticHooks.js

@@ -1163,6 +1163,32 @@ module.exports = (session) => {
           expect(queries.length).to.equal(4);
         });
 
+        it('should be able to access modelOptions in beforeUpdate when using patchAndFetchById', async () => {
+          Movie.beforeUpdate = createHookSpy(({ modelOptions }) => {
+            chaiExpect(modelOptions).to.deep.equal({ patch: true });
+          });
+
+          const hungerGames = await Movie.query().findOne('name', 'like', '%gam%');
+          expect(queries.length).to.equal(1);
+
+          await Movie.query().patchAndFetchById(hungerGames.id, { name: 'Updated' });
+          expect(Movie.beforeUpdate.calls.length).to.equal(1);
+        });
+
+        it('should populate modelOptions with old data when using upsertGraph', async () => {
+          Movie.beforeUpdate = createHookSpy(({ modelOptions }) => {
+            expect(modelOptions).to.have.property('old');
+
+            chaiExpect(modelOptions.old).containSubset({ name: 'Hungergames' });
+          });
+
+          const hungerGames = await Movie.query().findOne('name', 'like', '%gam%');
+          expect(queries.length).to.equal(1);
+
+          await Movie.query().upsertGraph({ id: hungerGames.id, name: 'Updated' });
+          expect(Movie.beforeUpdate.calls.length).to.equal(1);
+        });
+
         it('should be able to cancel the query', () => {
           Movie.beforeUpdate = createHookSpy(({ cancelQuery }) => {
             cancelQuery();