Relations libraryID fixes

- For cross-library links, if both group libraries, store relation with
  source group. Otherwise, store with personal library.
- Send libraryID when syncing
- Update libraryID properly when syncing updated relation from server
- Increment sync API version so server can send relation libraryIDs
  safely

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

@@ -1180,7 +1180,12 @@ Zotero.Collection.prototype.addLinkedCollection = function (collection) {
 		Zotero.debug("Collections " + this.key + " and " + collection.key + " are already linked");
 		return false;
 	}
-	Zotero.Relations.add(null, url1, predicate, url2);
+	
+	// If both group libraries, store relation with source group.
+	// Otherwise, store with personal library.
+	var libraryID = (this.libraryID && item.libraryID) ? this.libraryID : null;
+	
+	Zotero.Relations.add(libraryID, url1, predicate, url2);
 }
 
 //

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

@@ -3621,7 +3621,12 @@ Zotero.Item.prototype.addLinkedItem = function (item) {
 		Zotero.debug("Items " + this.key + " and " + item.key + " are already linked");
 		return false;
 	}
-	Zotero.Relations.add(null, url1, predicate, url2);
+	
+	// If both group libraries, store relation with source group.
+	// Otherwise, store with personal library.
+	var libraryID = (this.libraryID && item.libraryID) ? this.libraryID : null;
+	
+	Zotero.Relations.add(libraryID, url1, predicate, url2);
 }
 
 

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

@@ -158,20 +158,46 @@ Zotero.Relation.prototype.save = function () {
 		throw ("Missing object in Zotero.Relation.save()");
 	}
 	
-	var sql = "INSERT OR IGNORE INTO relations "
+	var sql = "INSERT INTO relations "
 				+ "(libraryID, subject, predicate, object, clientDateModified) "
 				+ "VALUES (?, ?, ?, ?, ?)";
-	var insertID = Zotero.DB.query(
-		sql,
-		[
-			this.libraryID,
-			this.subject,
-			this.predicate,
-			this.object,
-			Zotero.DB.transactionDateTime
-		]
-	);
-	
+	try {
+		var insertID = Zotero.DB.query(
+			sql,
+			[
+				this.libraryID,
+				this.subject,
+				this.predicate,
+				this.object,
+				Zotero.DB.transactionDateTime
+			]
+		);
+	}
+	catch (e) {
+		// If above failed, try deleting existing row, in case libraryID has changed
+		Zotero.DB.beginTransaction();
+		
+		var sql2 = "SELECT COUNT(*) FROM relations WHERE subject=? AND predicate=? AND object=?";
+		if (Zotero.DB.valueQuery(sql2, [this.subject, this.predicate, this.object])) {
+			// Delete
+			sql2 = "DELETE FROM relations WHERE subject=? AND predicate=? AND object=?";
+			Zotero.DB.query(sql2, [this.subject, this.predicate, this.object]);
+			
+			// Insert with original query
+			var insertID = Zotero.DB.query(
+				sql,
+				[
+					this.libraryID,
+					this.subject,
+					this.predicate,
+					this.object,
+					Zotero.DB.transactionDateTime
+				]
+			);
+		}
+		
+		Zotero.DB.commitTransaction();
+	}
 	return insertID;
 }
 
@@ -199,6 +225,7 @@ Zotero.Relation.prototype.erase = function () {
 
 Zotero.Relation.prototype.toXML = function () {
 	var xml = <relation/>;
+	xml.@libraryID = this.libraryID;
 	xml.subject = this.subject;
 	xml.predicate = this.predicate;
 	xml.object = this.object;

chrome/content/zotero/xpcom/sync.js

@@ -1209,7 +1209,7 @@ Zotero.Sync.Server = new function () {
 	this.manualSyncRequired = false;
 	this.upgradeRequired = false;
 	this.nextLocalSyncDate = false;
-	this.apiVersion = 8;
+	this.apiVersion = 9;
 	
 	default xml namespace = '';
 	
@@ -2203,7 +2203,8 @@ Zotero.Sync.Server = new function () {
 			Zotero.userID = userID;
 			Zotero.libraryID = libraryID;
 			
-			// Update userID in relations
+			// Update libraryID in relations, which we store for the local
+			// for some reason. All other objects use null for the local library.
 			if (lastUserID && lastLibraryID) {
 				Zotero.Relations.updateUser(lastUserID, lastLibraryID, userID, libraryID);