diff --git a/filter.go b/filter.go
index 433c9f7..f28963b 100644
--- a/filter.go
+++ b/filter.go
@@ -6,7 +6,6 @@ import (
 	"strings"
 	"time"
 
-	"gitbase.de/gopackage/mgocrud"
 	"gopkg.in/mgo.v2/bson"
 )
 
@@ -254,54 +253,3 @@ func _validateFilter(structT reflect.Type, f bson.M, checkValues bool) (bson.M,
 
 	return newF, nil
 }
-
-func validateFilter(c *Context, m mgocrud.ModelInterface, filter bson.M) (newFilter bson.M, err error) {
-	// 	spew.Dump(filter)
-	defer func() {
-		if r := recover(); r != nil {
-			err = fmt.Errorf("filter validation error: %s", r)
-		}
-	}()
-
-	if filter != nil {
-		newFilter, err = _validateFilter(reflect.TypeOf(m), filter, true)
-		if err != nil {
-			return nil, err
-		}
-	}
-
-	if i, ok := m.(interface {
-		ValidateFilter(*Context, bson.M) (bson.M, error)
-	}); ok {
-		// custom filter manipulation
-		newFilter, err = i.ValidateFilter(c, newFilter)
-	}
-
-	//	spew.Dump(newFilter)
-
-	return newFilter, err
-}
-
-func validateSelect(c *Context, m mgocrud.ModelInterface, selector bson.M) (newSelector bson.M, err error) {
-	defer func() {
-		if r := recover(); r != nil {
-			err = fmt.Errorf("select validation error: %s", r)
-		}
-	}()
-
-	if selector != nil {
-		newSelector, err = _validateFilter(reflect.TypeOf(m), selector, false)
-		if err != nil {
-			return nil, err
-		}
-	}
-
-	if i, ok := m.(interface {
-		ValidateSelect(*Context, bson.M) bson.M
-	}); ok {
-		// custom select manipulation
-		newSelector = i.ValidateSelect(c, newSelector)
-	}
-
-	return newSelector, nil
-}
diff --git a/handler.go b/handler.go
index f2a870e..969b6e4 100644
--- a/handler.go
+++ b/handler.go
@@ -241,7 +241,11 @@ func (api *API) collectionPostHandler(m mgocrud.ModelInterface) gin.HandlerFunc
 		defer session.Close()
 		db := session.DB(api.DBName)
 
-		if err := mgocrud.ValidateObject(db, newM, nil); err != nil {
+		if err := validateObject(&Context{
+			API:     api,
+			Context: c,
+			DB:      db,
+		}, newM, nil); err != nil {
 			c.JSON(400, gin.H{
 				"error": err.Error(),
 			})
@@ -256,6 +260,25 @@ func (api *API) collectionPostHandler(m mgocrud.ModelInterface) gin.HandlerFunc
 			return
 		}
 
+		newM, err = getDocument(c, db, newM, nil)
+		if err != nil {
+			c.JSON(500, gin.H{
+				"error": err.Error(),
+			})
+			return
+		}
+
+		if err := savedObject(&Context{
+			API:     api,
+			Context: c,
+			DB:      db,
+		}, newM, nil); err != nil {
+			c.JSON(400, gin.H{
+				"error": err.Error(),
+			})
+			return
+		}
+
 		c.JSON(200, newM)
 	}
 }
@@ -350,7 +373,11 @@ func (api *API) collectionPutHandler(m mgocrud.ModelInterface) gin.HandlerFunc {
 		//spew.Dump(changes)
 		//spew.Dump(orgM)
 
-		if err := mgocrud.ValidateObject(db, orgM, changes); err != nil {
+		if err := validateObject(&Context{
+			API:     api,
+			Context: c,
+			DB:      db,
+		}, orgM, changes); err != nil {
 			c.JSON(400, gin.H{
 				"error": err.Error(),
 			})
@@ -375,6 +402,17 @@ func (api *API) collectionPutHandler(m mgocrud.ModelInterface) gin.HandlerFunc {
 			return
 		}
 
+		if err := savedObject(&Context{
+			API:     api,
+			Context: c,
+			DB:      db,
+		}, newM, changes); err != nil {
+			c.JSON(400, gin.H{
+				"error": err.Error(),
+			})
+			return
+		}
+
 		c.JSON(200, newM)
 
 	}
diff --git a/hooks.go b/hooks.go
new file mode 100644
index 0000000..581400f
--- /dev/null
+++ b/hooks.go
@@ -0,0 +1,85 @@
+package mgoapi
+
+import (
+	"fmt"
+	"reflect"
+
+	"gitbase.de/gopackage/mgocrud"
+	"gopkg.in/mgo.v2/bson"
+)
+
+func validateFilter(c *Context, m mgocrud.ModelInterface, filter bson.M) (newFilter bson.M, err error) {
+	// 	spew.Dump(filter)
+	defer func() {
+		if r := recover(); r != nil {
+			err = fmt.Errorf("filter validation error: %s", r)
+		}
+	}()
+
+	if filter != nil {
+		newFilter, err = _validateFilter(reflect.TypeOf(m), filter, true)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	if i, ok := m.(interface {
+		ValidateFilter(*Context, bson.M) (bson.M, error)
+	}); ok {
+		// custom filter manipulation
+		newFilter, err = i.ValidateFilter(c, newFilter)
+	}
+
+	//	spew.Dump(newFilter)
+
+	return newFilter, err
+}
+
+func validateSelect(c *Context, m mgocrud.ModelInterface, selector bson.M) (newSelector bson.M, err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			err = fmt.Errorf("select validation error: %s", r)
+		}
+	}()
+
+	if selector != nil {
+		newSelector, err = _validateFilter(reflect.TypeOf(m), selector, false)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	if i, ok := m.(interface {
+		ValidateSelect(*Context, bson.M) bson.M
+	}); ok {
+		// custom select manipulation
+		newSelector = i.ValidateSelect(c, newSelector)
+	}
+
+	return newSelector, nil
+}
+
+// validateObject first validates via custom validate function on model with api context,
+// later it validates via mgocrud validator
+func validateObject(c *Context, m mgocrud.ModelInterface, changes bson.M) error {
+	if i, ok := m.(interface {
+		Validate(*Context, bson.M) error
+	}); ok {
+		err := i.Validate(c, changes)
+		if err != nil {
+			return err
+		}
+	}
+
+	return mgocrud.ValidateObject(c.DB, m, changes)
+}
+
+func savedObject(c *Context, m mgocrud.ModelInterface, changes bson.M) error {
+	if i, ok := m.(interface {
+		Saved(*Context, bson.M) error
+	}); ok {
+		return i.Saved(c, changes)
+	}
+
+	return nil
+}