Cache: Allow deletion by cache key

src/Cache.h

@@ -102,11 +102,9 @@ class Cache
             return res;
         }
 
-        static bool destroy( sqlite3* dbConnection, const std::shared_ptr<IMPL>& self )
+        static bool destroy( sqlite3* dbConnection, const typename CACHEPOLICY::KeyType& key )
         {
             std::lock_guard<std::mutex> lock( Mutex );
-
-            auto key = CACHEPOLICY::key( self );
             auto it = Store.find( key );
             if ( it != Store.end() )
                 Store.erase( it );
@@ -115,6 +113,12 @@ class Cache
             return SqliteTools::executeDelete( dbConnection, req.c_str(), key );
         }
 
+        static bool destroy( sqlite3* dbConnection, const std::shared_ptr<IMPL>& self )
+        {
+            const auto& key = CACHEPOLICY::key( self );
+            return destroy( dbConnection, key );
+        }
+
     private:
         static std::unordered_map<typename CACHEPOLICY::KeyType, std::shared_ptr<IMPL> > Store;
         static std::mutex Mutex;

src/MediaLibrary.cpp

@@ -60,8 +60,7 @@ LabelPtr MediaLibrary::createLabel( const std::string& label )
 
 bool MediaLibrary::deleteLabel( const std::string& text )
 {
-    auto label = Label::fetch( m_dbConnection, text );
-    return deleteLabel( label );
+    return Label::destroy( m_dbConnection, text );
 }
 
 bool MediaLibrary::deleteLabel( LabelPtr label )