Fix deletion of tags across libraries

https://forums.zotero.org/discussion/comment/296384/#Comment_296384

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

@@ -431,9 +431,11 @@ Zotero.Tags = new function() {
 		
 		Zotero.DB.requireTransaction();
 		
+		var sql;
+		
 		// Use given tags, as long as they're orphaned
 		if (tagIDs) {
-			let sql = "CREATE TEMPORARY TABLE tagDelete (tagID INT PRIMARY KEY)";
+			sql = "CREATE TEMPORARY TABLE tagDelete (tagID INT PRIMARY KEY)";
 			yield Zotero.DB.queryAsync(sql);
 			yield Zotero.Utilities.Internal.forEachChunkAsync(
 				tagIDs,
@@ -446,13 +448,17 @@ Zotero.Tags = new function() {
 					);
 				}
 			);
-			sql = "SELECT tagID AS id, name FROM tagDelete JOIN tags USING (tagID) "
+			
-				+ "WHERE tagID NOT IN (SELECT tagID FROM itemTags)";
+			// Skip tags that are still linked to items
+			sql = "DELETE FROM tagDelete WHERE tagID IN (SELECT tagID FROM itemTags)";
+			yield Zotero.DB.queryAsync(sql);
+			
+			sql = "SELECT tagID AS id, name FROM tagDelete JOIN tags USING (tagID)";
 			var toDelete = yield Zotero.DB.queryAsync(sql);
 		}
 		// Look for orphaned tags
 		else {
-			var sql = "CREATE TEMPORARY TABLE tagDelete AS "
+			sql = "CREATE TEMPORARY TABLE tagDelete AS "
 				+ "SELECT tagID FROM tags WHERE tagID NOT IN (SELECT tagID FROM itemTags)";
 			yield Zotero.DB.queryAsync(sql);
 			
@@ -461,11 +467,10 @@ Zotero.Tags = new function() {
 			
 			sql = "SELECT tagID AS id, name FROM tagDelete JOIN tags USING (tagID)";
 			var toDelete = yield Zotero.DB.queryAsync(sql);
-			
+		}
-			if (!toDelete.length) {
+		
-				sql = "DROP TABLE tagDelete";
+		if (!toDelete.length) {
-				return Zotero.DB.queryAsync(sql);
+			return Zotero.DB.queryAsync("DROP TABLE tagDelete");
-			}
 		}
 		
 		var ids = [];

test/tests/tagsTest.js

@@ -39,35 +39,46 @@ describe("Zotero.Tags", function () {
 	});
 	
 	describe("#removeFromLibrary()", function () {
-		it("should remove tags in given library", function* () {
+		it("should remove tags in given library", async function () {
 			var libraryID = Zotero.Libraries.userLibraryID;
-			var groupLibraryID = (yield getGroup()).libraryID;
+			var groupLibraryID = (await getGroup()).libraryID;
 			
 			var tags = [];
 			var items = [];
-			yield Zotero.DB.executeTransaction(function* () {
+			await Zotero.DB.executeTransaction(async function () {
 				for (let i = 0; i < 10; i++) {
 					let tagName = Zotero.Utilities.randomString();
 					tags.push(tagName);
-					let item = createUnsavedDataObject('item');
+					let item = createUnsavedDataObject('item', { tags: [tagName] });
-					item.addTag(tagName);
+					await item.save();
-					yield item.save();
 					items.push(item);
 				}
 			});
 			
-			var groupTagName = Zotero.Utilities.randomString();
+			var groupTagName = tags[0];
-			var groupItem = createUnsavedDataObject('item', { libraryID: groupLibraryID });
+			var groupItem = await createDataObject(
-			groupItem.addTag(groupTagName);
+				'item',
-			yield groupItem.saveTx();
+				{
+					libraryID: groupLibraryID,
+					tags: [groupTagName]
+				}
+			);
 			
 			var tagIDs = tags.map(tag => Zotero.Tags.getID(tag));
-			yield Zotero.Tags.removeFromLibrary(libraryID, tagIDs);
+			await Zotero.Tags.removeFromLibrary(libraryID, tagIDs);
 			items.forEach(item => assert.lengthOf(item.getTags(), 0));
 			
 			// Group item should still have the tag
-			assert.lengthOf(groupItem.getTags(), 1);
+			assert.sameDeepMembers(groupItem.getTags(), [{ tag: groupTagName }]);
-		})
+			assert.equal(
+				await Zotero.DB.valueQueryAsync(
+					"SELECT COUNT(*) FROM itemTags WHERE itemID=?",
+					groupItem.id
+				),
+				1
+			);
+		});
+		
 		
 		it("should reload tags of associated items", function* () {
 			var libraryID = Zotero.Libraries.userLibraryID;