Add convenient method to clean all loaded (cached) instances

Author: Kjuly

FCModel/FCModel.h

@@ -192,6 +192,9 @@ extern NSString * const FCModelChangedFieldsKey;
 // All instances of the called class in memory. Call on a subclass, not FCModel directly. You probably don't need this, until you do.
 + (NSArray *)allLoadedInstances;
 
+// Convenient method to clean all loaded (cached) instances. Call on a subclass to clean for the specific table; Call on FCModel directly to clean for all tables.
++ (void)cleanAllLoadedInstances;
+
 // Issues SQLite VACUUM to rebuild database and recover deleted pages. Returns NO if a transaction is in progress that prevents it.
 + (BOOL)vacuumIfPossible;
 

FCModel/FCModel.m

@@ -113,6 +113,14 @@ + (NSArray *)allLoadedInstances
     return outArray ?: @[];
 }
 
++ (void)cleanAllLoadedInstances
+{
+    fcm_onMainThread(^{
+        if (self.class == FCModel.class) [g_instances removeAllObjects];
+        else [g_instances removeObjectForKey:self];
+    });
+}
+
 + (instancetype)instanceWithPrimaryKey:(id)primaryKeyValue { return [self instanceWithPrimaryKey:primaryKeyValue databaseRowValues:nil createIfNonexistent:YES]; }
 + (instancetype)instanceWithPrimaryKey:(id)primaryKeyValue createIfNonexistent:(BOOL)create { return [self instanceWithPrimaryKey:primaryKeyValue databaseRowValues:nil createIfNonexistent:create]; }