diff --git a/button/src/main/java/com/button/model/entity/ProductList.java b/button/src/main/java/com/button/model/entity/ProductList.java
index aaae8b7..96389e3 100644
--- a/button/src/main/java/com/button/model/entity/ProductList.java
+++ b/button/src/main/java/com/button/model/entity/ProductList.java
@@ -19,12 +19,15 @@ public class ProductList {
     @ManyToMany(
             fetch = FetchType.EAGER,
             cascade = CascadeType.PERSIST
+
     )
+  
     @JoinTable(
             name = "users_product_list",
             joinColumns = {@JoinColumn(name = "product_list_id")},
             inverseJoinColumns = {@JoinColumn(name = "user_id")}
     )
+
     private Set<User> users = new HashSet<>();
 
     @OneToMany(
diff --git a/button/src/main/java/com/button/model/entity/ProductProperty.java b/button/src/main/java/com/button/model/entity/ProductProperty.java
index c432b24..a5719a3 100644
--- a/button/src/main/java/com/button/model/entity/ProductProperty.java
+++ b/button/src/main/java/com/button/model/entity/ProductProperty.java
@@ -19,11 +19,11 @@ public class ProductProperty {
     @JoinColumn(name = "product_list_id", referencedColumnName = "id")
     private ProductList productList;
 
-    private Float quantity;
+    private Float quantity = 1.0f;
 
-    private Boolean state;
+    private Boolean state = false;
 
-    private String units;
+    private String units = "шт";
 
     public ProductProperty() {}
 
diff --git a/button/src/main/java/com/button/web/controller/ListProductsPageController.java b/button/src/main/java/com/button/web/controller/ListProductsPageController.java
index e42808b..3f155bb 100644
--- a/button/src/main/java/com/button/web/controller/ListProductsPageController.java
+++ b/button/src/main/java/com/button/web/controller/ListProductsPageController.java
@@ -42,17 +42,32 @@ public String addProductPage(Model model, @PathVariable("list_id") Integer listI
     public String addProductToList(@PathVariable("list_id") Integer listId,
                                    @ModelAttribute("new_product") Product newProduct)
     {
-
         Product product = productRepository.findProductByName(newProduct.getName());
-        if (product == null) {
-            product = productRepository.save(newProduct);
-        }
+        boolean isNewProductEqualsNothing = newProduct.getName() == null || newProduct.getName().trim().length() == 0;
+
+        if ( ! isNewProductEqualsNothing) {
+            if (product == null) {
+                newProduct.setName(newProduct.getName().trim());
+                product = productRepository.save(newProduct);
+            }
 
-        ProductProperty productProperty = new ProductProperty();
-        productProperty.setProductId(product.getId());
-        productProperty.setProductListId(listId);
-        productPropertyRepository.save(productProperty);
+            ProductProperty productProperty = new ProductProperty();
+            productProperty.setProductId(product.getId());
+            productProperty.setProductListId(listId);
 
+            //наличие продукта в ProductList увеличивает его количество на 1, копирует остальные данные
+            Iterable<ProductProperty> listProducts = productPropertyRepository.findProductsByProductListId(listId);
+            for (ProductProperty productProperty1: listProducts) {
+                if (productProperty1.getProduct().getId().intValue() == product.getId().intValue()) {
+                    productProperty.setId(productProperty1.getId());
+                    productProperty.setQuantity(productProperty1.getQuantity());
+                    productProperty.setUnits(productProperty1.getUnits());
+                    productProperty.setState(false);
+                }
+            }
+
+            productPropertyRepository.save(productProperty);
+        }
         return "redirect:/list_products/" + listId;
     }
 }
diff --git a/button/src/main/java/com/button/web/controller/ProductListPageController.java b/button/src/main/java/com/button/web/controller/ProductListPageController.java
index 4e1ce1d..4de9718 100644
--- a/button/src/main/java/com/button/web/controller/ProductListPageController.java
+++ b/button/src/main/java/com/button/web/controller/ProductListPageController.java
@@ -44,6 +44,7 @@ public String addNewProductList(@ModelAttribute("product_list") @Valid ProductLi
 
     @GetMapping("/delete/{id}")
     public String deleteProductListPage(@PathVariable Integer id) {
+
         ProductList productList = productListRepository.findById(id).get();
         Set<User> users = productList.getUsers();
         for (User user : users) {
@@ -51,7 +52,6 @@ public String deleteProductListPage(@PathVariable Integer id) {
         }
         userRepository.saveAll(users);
         productListRepository.delete(productList);
-
         return "redirect:/index";
     }