diff --git a/src/main/java/com/labwork1/app/student/model/Customer.java b/src/main/java/com/labwork1/app/student/model/Customer.java
index 247efea..69d24be 100644
--- a/src/main/java/com/labwork1/app/student/model/Customer.java
+++ b/src/main/java/com/labwork1/app/student/model/Customer.java
@@ -27,10 +27,6 @@ public class Customer {
         this.orders = new ArrayList<>();
     }
 
-    public void addOrder(Order order) {
-        orders.add(order);
-    }
-
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;
@@ -77,7 +73,9 @@ public class Customer {
         return orders;
     }
 
-    public void setOrders(List<Order> orders) {
-        this.orders = orders;
+    public void setOrder(Order order) {
+        if (order.getCustomer().equals(this)) {
+            this.orders.add(order);
+        }
     }
 }
diff --git a/src/main/java/com/labwork1/app/student/model/Order.java b/src/main/java/com/labwork1/app/student/model/Order.java
index 7ce8faf..911fbf6 100644
--- a/src/main/java/com/labwork1/app/student/model/Order.java
+++ b/src/main/java/com/labwork1/app/student/model/Order.java
@@ -28,8 +28,7 @@ public class Order {
     public Order() {
     }
 
-    public Order(Customer customer, Date dateOfPurchase) {
-        this.customer = customer;
+    public Order(Date dateOfPurchase) {
         this.dateOfPurchase = dateOfPurchase;
     }
 
@@ -81,6 +80,9 @@ public class Order {
 
     public void setCustomer(Customer customer) {
         this.customer = customer;
+        if (!customer.getOrders().contains(this)) {
+            customer.setOrder(this);
+        }
     }
 
     public List<Ticket> getTickets() {
diff --git a/src/main/java/com/labwork1/app/student/service/OrderService.java b/src/main/java/com/labwork1/app/student/service/OrderService.java
index ab89613..083957c 100644
--- a/src/main/java/com/labwork1/app/student/service/OrderService.java
+++ b/src/main/java/com/labwork1/app/student/service/OrderService.java
@@ -19,12 +19,13 @@ public class OrderService {
 
     @Transactional
     public Order addOrder(Customer customer) {
-        if (customer == null) {
+        if (customer == null || em.find(Customer.class, customer.getId()) == null) {
             throw new IllegalArgumentException("addOrder empty fields");
         }
-        final Order order = new Order(customer,
-                new Date(System.currentTimeMillis()));
+        final Order order = new Order(new Date(System.currentTimeMillis()));
+        order.setCustomer(customer);
         em.persist(order);
+        em.merge(customer);
         return order;
     }
 
@@ -35,6 +36,8 @@ public class OrderService {
         }
         final Order currentOrder = findOrder(id);
         currentOrder.addTicket(ticket);
+        ticket.setOrder(currentOrder);
+        em.merge(ticket);
         return em.merge(currentOrder);
     }
 
@@ -53,19 +56,6 @@ public class OrderService {
                 .getResultList();
     }
 
-    @Transactional
-    public Order updateOrder(Long id, Date dateOfPurchase, List<Ticket> tickets) {
-        if (dateOfPurchase == null || tickets == null) {
-            throw new IllegalArgumentException("updateOrder empty fields");
-        }
-        if (tickets.size() == 0)
-            return deleteOrder(id);
-        final Order currentOrder = findOrder(id);
-        currentOrder.setDateOfPurchase(dateOfPurchase);
-        currentOrder.setTickets(tickets);
-        return em.merge(currentOrder);
-    }
-
     @Transactional
     public Order deleteOrder(Long id) {
         final Order currentOrder = findOrder(id);
@@ -74,16 +64,13 @@ public class OrderService {
     }
 
     @Transactional
-    public void deleteTicketInOrder(Long id, Long ticket_id) {
-//        final Order currentOrder = findOrder(id);
-//        em.remove(currentOrder);
-//        return currentOrder;
-        final Order currentReader = findOrder(id);
-        final Ticket currentManga = em.find(Ticket.class, ticket_id);
-        currentReader.getTickets().remove(currentManga);
-        currentManga.getOrders().remove(currentReader);
-        em.merge(currentReader);
-        em.merge(currentManga);
+    public Order deleteTicketInOrder(Long id, Ticket ticket) {
+        final Order currentOrder = findOrder(id);
+        final Ticket currentTicket = em.find(Ticket.class, ticket.getId());
+        currentOrder.getTickets().remove(currentTicket);
+        currentTicket.getOrders().remove(currentOrder);
+        em.merge(currentTicket);
+        return em.merge(currentOrder);
     }
 
     @Transactional
diff --git a/src/test/java/com/labwork1/app/JpaCustomerTests.java b/src/test/java/com/labwork1/app/JpaCustomerTests.java
index 53af5c9..53ce456 100644
--- a/src/test/java/com/labwork1/app/JpaCustomerTests.java
+++ b/src/test/java/com/labwork1/app/JpaCustomerTests.java
@@ -32,37 +32,38 @@ public class JpaCustomerTests {
         ticketService.deleteAllTickets();
         orderService.deleteAllOrders();
         customerService.deleteAllCustomers();
-
+        // 2 билета
         final Ticket ticket1 = ticketService.addTicket("Меню", 300.0, new Timestamp(System.currentTimeMillis()));
         final Ticket ticket2 = ticketService.addTicket("Аватар", 200.0, new Timestamp(System.currentTimeMillis()));
-
+        // 1 покупатель
         final Customer customer1 = customerService.addCustomer("Родион", "Иванов");
-
+        // 1 заказ, 1 копия заказа
         final Order order0 = orderService.addOrder(customerService.findCustomer(customer1.getId()));
         final Order order1 = orderService.findOrder(order0.getId());
         Assertions.assertEquals(order0, order1);
 
         Assertions.assertEquals(customerService
                 .findCustomer(customer1.getId()).getOrders().size(), 1);
-
+        // 0 заказов
         orderService.deleteAllOrders();
         Assertions.assertThrows(EntityNotFoundException.class, () -> orderService.findOrder(-1L));
-
+        // 2 покупателя
         final Customer customer2 = customerService.addCustomer("Иннокентий", "Иванов");
-
+        // 3 билета
         final Ticket ticket3 = ticketService.addTicket("Чебурашка", 300.0, new Timestamp(System.currentTimeMillis()));
-
+        // 1 заказ
         final Order order2 = orderService
                 .addOrder(customerService.findCustomer(customer2.getId()));
-
+        // у заказа 2 билета
         orderService.addTicket(order2.getId(), ticket1);
         orderService.addTicket(order2.getId(), ticket2);
-
-        orderService.deleteTicketInOrder(order2.getId(), ticket2.getId());
+        // у заказа 1 билет
+        orderService.deleteTicketInOrder(order2.getId(), ticket2);
 
         Assertions.assertEquals(orderService
-                .findOrder(order2.getId()).getTickets().size(), 2);
-
+                .findOrder(order2.getId()).getTickets().size(), 1);
+        // 2-ой покупатель удален
+        // 0 заказов
         customerService.deleteCustomer(customer2.getId());
         Assertions.assertThrows(EntityNotFoundException.class, () -> customerService.findCustomer(customer2.getId()));
         Assertions.assertThrows(EntityNotFoundException.class, () -> orderService.findOrder(order2.getId()));