Did you look through this...
Building a CRUD Application with SAPUI5 Using Odata Model
..or any of these?
SAPUI5 - CRUD Operations Part 1 - Gateway Service Using DDIC IMPORT - YouTube
SAPUI5 - CRUD Operations Part 2 - Testing - YouTube
SAPUI5 - CRUD Operations Part 3 - Creating our view - YouTube
SAPUI5 - CRUD Operations Part 4 - YouTube