Вроде робит, дальше допиливаем

app/build.gradle.kts

@@ -96,6 +96,4 @@ dependencies {
     androidTestImplementation("androidx.compose.ui:ui-test-junit4")
     debugImplementation("androidx.compose.ui:ui-tooling")
     debugImplementation("androidx.compose.ui:ui-test-manifest")
-
-    //
 }

app/src/main/java/com/example/myapplication/database/entities/composeui/ItemList.kt

@@ -52,7 +52,7 @@ fun ItemList(
     val bikeWithItems = bikeWithItemsViewModel.bikeUiState.bikeWithItems!!
 
     var getUser by remember { mutableStateOf(currentUserViewModel.user) }
-    Log.d("Удачи","${getUser?.uid}")
+    Log.d("Пожалуйста, работай","${getUser?.uid}")
 
     LazyColumn {
         if (bikeWithItems.items.isEmpty()) {
@@ -118,7 +118,7 @@ fun ItemList(
                                 onClick = {
                                     coroutineScope.launch {
                                         if (item.availableCount != 0) {
-                                            viewModel.addItemInCart(itemId = item.uid)
+                                            getUser?.uid?.let { viewModel.addItemInCart(userId = it,itemId = item.uid) }
                                         }
                                     }
                                 },

app/src/main/java/com/example/myapplication/database/entities/composeui/ItemListViewModel.kt

@@ -23,9 +23,9 @@ class ItemListViewModel(
         )
     }
 
-    suspend fun addItemInCart(itemId: Int, count: Int = 1) {
+    suspend fun addItemInCart(userId: Int, itemId: Int, count: Int = 1) {
         try {
-            userItemRepository.insertUserItem(UserItemCrossRef(1, itemId, count))
+            userItemRepository.insertUserItem(UserItemCrossRef(userId, itemId, count))
         } catch (_: Exception) {
 
         }

local.properties

@@ -1,8 +0,0 @@
-## This file must *NOT* be checked into Version Control Systems,
-# as it contains information specific to your local configuration.
-#
-# Location of the SDK. This is only used by Gradle.
-# For customization when using a Version Control System, please read the
-# header note.
-#Wed Dec 20 12:58:59 MSK 2023
-sdk.dir=C\:\\Users\\Maxim\\AppData\\Local\\Android\\Sdk

server/data.json

@@ -7,7 +7,7 @@
       "items": [
         {
           "id": 1,
-          "count": 1,
+          "count": 3,
           "bikeId": 1
         },
         {
@@ -73,6 +73,66 @@
           "bikeId": 1
         }
       ]
+    },
+    {
+      "id": 3,
+      "userId": 7,
+      "items": [
+        {
+          "id": 1,
+          "dateTime": 2021,
+          "frozenWeight": 26.6,
+          "count": 2,
+          "bikeId": 1
+        },
+        {
+          "id": 4,
+          "dateTime": 2023,
+          "frozenWeight": 26.3,
+          "count": 1,
+          "bikeId": 2
+        }
+      ]
+    },
+    {
+      "id": 4,
+      "userId": 7,
+      "items": [
+        {
+          "id": 1,
+          "dateTime": 2021,
+          "frozenWeight": 26.6,
+          "count": 2,
+          "bikeId": 1
+        },
+        {
+          "id": 4,
+          "dateTime": 2023,
+          "frozenWeight": 26.3,
+          "count": 1,
+          "bikeId": 2
+        }
+      ]
+    },
+    {
+      "id": 5,
+      "userId": 7,
+      "items": [
+        {
+          "id": 1,
+          "dateTime": 2021,
+          "frozenWeight": 26.6,
+          "count": 3,
+          "bikeId": 1
+        },
+        {
+          "id": 4,
+          "dateTime": 2023,
+          "frozenWeight": 26.3,
+          "count": 1,
+          "bikeId": 2
+        }
+      ]
     }
   ],
   "items": [