// POST: odata/OrderTask
        public IHttpActionResult Post(order_task order_task)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            db.order_task.Add(order_task);

            try
            {
                db.SaveChanges();
            }
            catch (DbUpdateException)
            {
                if (order_taskExists(order_task.order_id, order_task.task_code))
                {
                    return(Conflict());
                }
                else
                {
                    throw;
                }
            }

            return(Created(order_task));
        }
        public IHttpActionResult Patch([FromODataUri] int order_id, [FromODataUri] string task_code, Delta <order_task> patch)
        {
            Validate(patch.GetEntity());

            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            // order_task order_task = db.order_task.Find(order_id);
            order_task order_task = db.order_task.FirstOrDefault(p => p.order_id == order_id && p.task_code == task_code);

            if (order_task == null)
            {
                return(NotFound());
            }

            patch.Patch(order_task);

            try
            {
                db.SaveChanges();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!order_taskExists(order_id, task_code))
                {
                    return(NotFound());
                }
                else
                {
                    throw;
                }
            }

            return(Updated(order_task));
        }