Use getAsync() to acquire subject in Zotero.Relations.getByObject()

chrome/content/zotero/xpcom/data/relations.js

@@ -146,7 +146,7 @@ Zotero.Relations = new function () {
 	 * @return {Object[]} - An array of objects with a Zotero.DataObject as 'subject'
 	 *     and a predicate string as 'predicate'
 	 */
-	this.getByObject = function (objectType, object) {
+	this.getByObject = Zotero.Promise.coroutine(function* (objectType, object) {
 		var objectsClass = Zotero.DataObjectUtilities.getObjectsClassForObjectType(objectType);
 		var predicateIDs = [];
 		var o = _subjectPredicatesByObject[objectType]
@@ -156,13 +156,16 @@ Zotero.Relations = new function () {
 		}
 		var toReturn = [];
 		for (let predicateID in o) {
-			o[predicateID].forEach(subjectID => toReturn.push({
-				subject: objectsClass.get(subjectID),
-				predicate: Zotero.RelationPredicates.getName(predicateID)
-			}));
+			for (let subjectID of o[predicateID]) {
+				var subject = yield objectsClass.getAsync(subjectID);
+				toReturn.push({
+					subject: subject,
+					predicate: Zotero.RelationPredicates.getName(predicateID)
+				});
+			};
 		}
 		return toReturn;
-	};
+	});
 
 
 	this.updateUser = Zotero.Promise.coroutine(function* (fromUserID, toUserID) {
@@ -179,9 +182,9 @@ Zotero.Relations = new function () {
 			let objects = yield Zotero.DB.columnQueryAsync(
 				sql, 'http://zotero.org/users/' + fromUserID + '/%'
 			);
-			Zotero.DB.addCurrentCallback("commit", function () {
+			Zotero.DB.addCurrentCallback("commit", function* () {
 				for (let object of objects) {
-					let subPrefs = this.getByObject(type, object);
+					let subPrefs = yield this.getByObject(type, object);
 					let newObject = object.replace(
 						new RegExp("^http://zotero.org/users/" + fromUserID + "/(.*)"),
 						"http://zotero.org/users/" + toUserID + "/$1"
@@ -265,4 +268,4 @@ Zotero.Relations = new function () {
 		}
 		throw ("Invalid namespace in URI '" + uri + "' in Zotero.Relations._getPrefixAndValue()");
 	}
-}
+}