diff --git a/components/ido_mysql/mysqldbconnection.cpp b/components/ido_mysql/mysqldbconnection.cpp
index 3b8f4c4f0..3af6e450d 100644
--- a/components/ido_mysql/mysqldbconnection.cpp
+++ b/components/ido_mysql/mysqldbconnection.cpp
@@ -291,35 +291,45 @@ bool MysqlDbConnection::FieldToEscapedString(const String& key, const Value& val
 		return true;
 	}
 
-	if (value.IsObjectType<DynamicObject>()) {
-		DbObject::Ptr dbobjcol = DbObject::GetOrCreateByObject(value);
+	Value rawvalue = DbValue::ExtractValue(value);
+
+	if (rawvalue.IsObjectType<DynamicObject>()) {
+		DbObject::Ptr dbobjcol = DbObject::GetOrCreateByObject(rawvalue);
 
 		if (!dbobjcol) {
 			*result = 0;
 			return true;
 		}
 
-		DbReference dbrefcol = GetObjectID(dbobjcol);
+		DbReference dbrefcol;
 
-		if (!dbrefcol.IsValid()) {
-			InternalActivateObject(dbobjcol);
+		if (DbValue::IsObjectInsertID(value)) {
+			dbrefcol = GetInsertID(dbobjcol);
 
+			ASSERT(dbrefcol.IsValid());
+		} else {
 			dbrefcol = GetObjectID(dbobjcol);
 
-			if (!dbrefcol.IsValid())
-				return false;
+			if (!dbrefcol.IsValid()) {
+				InternalActivateObject(dbobjcol);
+
+				dbrefcol = GetObjectID(dbobjcol);
+
+				if (!dbrefcol.IsValid())
+					return false;
+			}
 		}
 
 		*result = static_cast<long>(dbrefcol);
 	} else if (DbValue::IsTimestamp(value)) {
-		long ts = DbValue::ExtractValue(value);
+		long ts = rawvalue; 
 		std::ostringstream msgbuf;
 		msgbuf << "FROM_UNIXTIME(" << ts << ")";
 		*result = Value(msgbuf.str());
 	} else if (DbValue::IsTimestampNow(value)) {
 		*result = "NOW()";
 	} else {
-		*result = "'" + Escape(DbValue::ExtractValue(value)) + "'";
+		*result = "'" + Escape(rawvalue) + "'";
 	}
 
 	return true;
diff --git a/lib/ido/dbvalue.cpp b/lib/ido/dbvalue.cpp
index 6a6034a52..c4dd6c86d 100644
--- a/lib/ido/dbvalue.cpp
+++ b/lib/ido/dbvalue.cpp
@@ -43,6 +43,11 @@ Value DbValue::FromValue(const Value& value)
 	return value;
 }
 
+Value DbValue::FromObjectInsertID(const Value& value)
+{
+	return boost::make_shared<DbValue>(DbValueObjectInsertID, value);
+}
+
 bool DbValue::IsTimestamp(const Value& value)
 {
 	if (!value.IsObjectType<DbValue>())
@@ -61,6 +66,15 @@ bool DbValue::IsTimestampNow(const Value& value)
 	return dbv->GetType() == DbValueTimestampNow;
 }
 
+bool DbValue::IsObjectInsertID(const Value& value)
+{
+	if (!value.IsObjectType<DbValue>())
+		return false;
+
+	DbValue::Ptr dbv = value;
+	return dbv->GetType() == DbValueObjectInsertID;
+}
+
 Value DbValue::ExtractValue(const Value& value)
 {
 	if (!value.IsObjectType<DbValue>())
diff --git a/lib/ido/dbvalue.h b/lib/ido/dbvalue.h
index 526fbc0a7..0aff0d78b 100644
--- a/lib/ido/dbvalue.h
+++ b/lib/ido/dbvalue.h
@@ -31,6 +31,7 @@ enum DbValueType
 {
 	DbValueTimestamp,
 	DbValueTimestampNow,
+	DbValueObjectInsertID,
 };
 
 /**
@@ -46,9 +47,11 @@ public:
 	static Value FromTimestamp(const Value& ts);
 	static Value FromTimestampNow(void);
 	static Value FromValue(const Value& value);
+	static Value FromObjectInsertID(const Value& value);
 
 	static bool IsTimestamp(const Value& value);
 	static bool IsTimestampNow(const Value& value);
+	static bool IsObjectInsertID(const Value& value);
 	static Value ExtractValue(const Value& value);
 
 	DbValueType GetType(void) const;
diff --git a/lib/ido/hostdbobject.cpp b/lib/ido/hostdbobject.cpp
index 815f45a18..f2d5bea6b 100644
--- a/lib/ido/hostdbobject.cpp
+++ b/lib/ido/hostdbobject.cpp
@@ -186,3 +186,37 @@ Dictionary::Ptr HostDbObject::GetStatusFields(void) const
 
 	return fields;
 }
+
+void HostDbObject::OnConfigUpdate(void)
+{
+	Host::Ptr host = static_pointer_cast<Host>(GetObject());
+
+	/* parents: host_id, parent_host_object_id */
+
+	/* delete possible definitions - TODO do that on startup */
+	DbQuery query1;
+	query1.Table = GetType()->GetTable() + "_parenthosts";
+	query1.Type = DbQueryDelete;
+	query1.WhereCriteria = boost::make_shared<Dictionary>();
+	query1.WhereCriteria->Set(GetType()->GetTable() + "_id", DbValue::FromObjectInsertID(GetObject()));
+	OnQuery(query1);
+
+	BOOST_FOREACH(const Host::Ptr& parent, host->GetParentHosts()) {
+		Log(LogDebug, "ido", "host parents: " + parent->GetName());
+
+		Dictionary::Ptr fields = boost::make_shared<Dictionary>();
+		fields->Set(GetType()->GetTable() + "_id", DbValue::FromObjectInsertID(GetObject()));
+		fields->Set("parent_host_object_id", parent);
+		fields->Set("instance_id", 0); /* DbConnection class fills in real ID */
+
+		DbQuery query2;
+		query2.Table = GetType()->GetTable() + "_parenthosts";
+		query2.Type = DbQueryInsert;
+		query2.Fields = fields;
+		OnQuery(query2);
+	}
+}
+
+void HostDbObject::OnStatusUpdate(void)
+{
+}
diff --git a/lib/ido/hostdbobject.h b/lib/ido/hostdbobject.h
index e7370ba43..45b26b469 100644
--- a/lib/ido/hostdbobject.h
+++ b/lib/ido/hostdbobject.h
@@ -40,6 +40,10 @@ public:
 
 	virtual Dictionary::Ptr GetConfigFields(void) const;
 	virtual Dictionary::Ptr GetStatusFields(void) const;
+
+private:
+	virtual void OnConfigUpdate(void);
+	virtual void OnStatusUpdate(void);
 };
 
 }