FaKrosnoApi/Controllers/CustomerOrdersController.cs

@@ -56,6 +56,13 @@ namespace FaKrosnoApi.Controllers
             return customerOrder != null ? Ok(customerOrder) : NotFound();
         }
         
+        [HttpGet("by-po")]
+        public async Task<ActionResult<CustomerOrderDto?>> GetByPo([FromQuery] string poNumber)
+        {
+            CustomerOrderDto? customerOrder = await service.GetByPo(poNumber);
+            return customerOrder != null ? Ok(customerOrder) : NotFound();
+        }
+
         [HttpGet("list-by-customer-and-po")]
         public async Task<ActionResult<IList<CustomerOrderDto?>>> GetListByCustomerAndPo(
             [FromQuery] string customerNumber, [FromQuery] int customerSequence, [FromQuery] string poNumber)

SytelineSaAppEfDataModel/Services/CustomerOrderService.cs

@@ -73,6 +73,13 @@ namespace SytelineSaAppEfDataModel.Services
                 .Select(x => mapper.Map<CustomerOrderDto>(x)).FirstOrDefaultAsync();
         }
         
+        public async Task<CustomerOrderDto?> GetByPo(string poNumber)
+        {
+            return await context.CustomerOrders.Where(x => x.CustPo == poNumber && x.Stat == "O")
+                .OrderByDescending(x => x.CreateDate).Select(x => mapper.Map<CustomerOrderDto>(x))
+                .FirstOrDefaultAsync();
+        }
+
         public async Task<IList<CustomerOrderDto>> GetListByCustomerAndPo(string customerNumber, int customerSequence,
             string poNumber)
         {

SytelineSaAppEfDataModel/Services/ICustomerOrderService.cs

@@ -17,6 +17,7 @@ namespace SytelineSaAppEfDataModel.Services
         Task<IList<CustomerOrderDto>> GetListByCustomerAndPo(string customerNumber, int customerSequence,
             string poNumber);
 
+        Task<CustomerOrderDto?> GetByPo(string poNumber);
         Task<List<CustomerOrderDto>> GetListByCustomer(string customerNumber, int customerSequence);
         Task<IEnumerable<CustomerOrderLineDto>?> GetLinesByCoNumber(string customerOrderNumber);
         Task<IEnumerable<CustomerOrderLineItemDto>?> GetItemsByCoNumber(string customerOrderNumber);