Fix some build errors.

Frameworks/Database/AuthorsTable.swift

@@ -32,27 +32,10 @@ final class AuthorsTable: DatabaseRelatedObjectsTable {
 
 	func objectWithRow(_ row: FMResultSet) -> DatabaseObject? {
 	
-		if let author = Author.authorWithRow(row) {
+		if let author = Author(row: row) {
 			return author as DatabaseObject
 		}
 		return nil
 	}
-	
-	func save(_ objects: [DatabaseObject], in database: FMDatabase) {
-
-		let attachments = objects.map { $0 as! Author }
-
-		// Authors in cache must already exist in database. Filter them out.
-		let authorsToSave = Set(attachments.filter { (attachment) -> Bool in
-			if let _ = cache[attachment.attachmentID] {
-				return false
-			}
-			return true
-		})
-
-		cacheAttachments(attachmentsToSave)
-
-		insertRows(attachmentsToSave.databaseDictionaries(), insertType: .orIgnore, in: database)
-}
 }
 

Frameworks/Database/Extensions/Attachment+Database.swift

@@ -61,7 +61,7 @@ extension Attachment: DatabaseObject {
 		}
 	}
 
-	func databaseDictionary() -> NSDictionary? {
+	public func databaseDictionary() -> NSDictionary? {
 
 		let d = NSMutableDictionary()
 

Frameworks/Database/Extensions/Author+Database.swift

@@ -13,34 +13,10 @@ import RSParser
 
 // MARK: - DatabaseObject
 
-extension Author: DatabaseObject {
-
-	public func databaseDictionary() -> NSDictionary? {
-
-		var d = NSMutableDictionary()
-
-		// TODO
-		
-		if d.count < 1 {
-			return nil
-		}
-		return (d.copy() as! NSDictionary)
-	}
-
-	
-	public var databaseID: String {
-		get {
-			return authorID
-		}
-	}
-}
-
-// MARK: - Private
-
-private extension Author {
+extension Author {
 	
 	init?(row: FMResultSet) {
-
+		
 		let authorID = row.string(forColumn: DatabaseKey.authorID)
 		let name = row.string(forColumn: DatabaseKey.name)
 		let url = row.string(forColumn: DatabaseKey.url)
@@ -56,6 +32,27 @@ private extension Author {
 	}
 }
 
+extension Author: DatabaseObject {
+
+	public var databaseID: String {
+		get {
+			return authorID
+		}
+	}
+
+	public func databaseDictionary() -> NSDictionary? {
+
+		var d = NSMutableDictionary()
+
+		// TODO
+		
+		if d.count < 1 {
+			return nil
+		}
+		return (d.copy() as! NSDictionary)
+	}
+}
+
 // MARK: Author creation from Set<ParsedAuthor>
 
 extension Set where Element == ParsedAuthor {

Frameworks/Database/Extensions/String+Database.swift

@@ -14,6 +14,13 @@ import RSDatabase
 
 extension String: DatabaseObject {
 	
+	public func databaseDictionary() -> NSDictionary? {
+		
+		preconditionFailure("databaseDictionary() called for a tag: this should never happen.")
+		return nil // unused
+	}
+	
+	
 	public var databaseID: String {
 		get {
 			return self