Added isDirty check on update and an option to disable this behavior

Author: JanHolger

src/main/java/org/javawebstack/orm/Model.java

@@ -73,6 +73,8 @@ public <T> T getOriginalValue(String field) {
 
     public boolean isDirty(String... fields) {
         List<String> dirty = getDirtyFields();
+        if(fields.length == 0 && dirty.size() > 0)
+            return true;
         for (String f : fields) {
             if (dirty.contains(f))
                 return true;

src/main/java/org/javawebstack/orm/ORMConfig.java

@@ -16,6 +16,7 @@ public class ORMConfig {
     private boolean idAutoIncrement = true;
     private final List<TypeMapper> typeMappers = new ArrayList<>();
     private Injector injector;
+    private boolean preventUnnecessaryUpdates = true;
 
     public ORMConfig() {
         typeMappers.add(new DefaultMapper());
@@ -113,4 +114,13 @@ public String getTypeParameters(Class<?> type, int size) {
         }
         return null;
     }
+
+    public boolean shouldPreventUnnecessaryUpdates() {
+        return preventUnnecessaryUpdates;
+    }
+
+    public ORMConfig setPreventUnnecessaryUpdates(boolean preventUnnecessaryUpdates) {
+        this.preventUnnecessaryUpdates = preventUnnecessaryUpdates;
+        return this;
+    }
 }

src/main/java/org/javawebstack/orm/Repo.java

@@ -155,6 +155,8 @@ private void executeCreate(T entry) {
     }
 
     public void update(T entry) {
+        if(info.getConfig().shouldPreventUnnecessaryUpdates() && !entry.isDirty())
+            return;
         observers.forEach(o -> o.saving(entry));
         observers.forEach(o -> o.updating(entry));
         where(info.getIdField(), getId(entry)).update(entry);