inventory control

server/prisma/schema.prisma

@@ -28,6 +28,7 @@ model User {
   approvedSalesOrders SalesOrder[] @relation("SalesOrderApprovedBy")
   salesQuoteRevisionsCreated SalesQuoteRevision[] @relation("SalesQuoteRevisionCreatedBy")
   salesOrderRevisionsCreated SalesOrderRevision[] @relation("SalesOrderRevisionCreatedBy")
+  inventoryTransfersCreated InventoryTransfer[] @relation("InventoryTransferCreatedBy")
 }
 
 model Role {
@@ -134,6 +135,8 @@ model InventoryItem {
   workOrders WorkOrder[]
   workOrderMaterialIssues WorkOrderMaterialIssue[]
   operations InventoryItemOperation[]
+  reservations InventoryReservation[]
+  transfers InventoryTransfer[]
 }
 
 model Warehouse {
@@ -148,6 +151,9 @@ model Warehouse {
   purchaseReceipts PurchaseReceipt[]
   workOrders WorkOrder[]
   workOrderMaterialIssues WorkOrderMaterialIssue[]
+  reservations InventoryReservation[]
+  transferSources InventoryTransfer[] @relation("InventoryTransferFromWarehouse")
+  transferDestinations InventoryTransfer[] @relation("InventoryTransferToWarehouse")
 }
 
 model Customer {
@@ -216,6 +222,9 @@ model WarehouseLocation {
   purchaseReceipts PurchaseReceipt[]
   workOrders WorkOrder[]
   workOrderMaterialIssues WorkOrderMaterialIssue[]
+  reservations InventoryReservation[]
+  transferSourceLocations InventoryTransfer[] @relation("InventoryTransferFromLocation")
+  transferDestinationLocations InventoryTransfer[] @relation("InventoryTransferToLocation")
 
   @@unique([warehouseId, code])
   @@index([warehouseId])
@@ -243,6 +252,51 @@ model InventoryTransaction {
   @@index([locationId, createdAt])
 }
 
+model InventoryTransfer {
+  id              String   @id @default(cuid())
+  itemId          String
+  fromWarehouseId String
+  fromLocationId  String
+  toWarehouseId   String
+  toLocationId    String
+  quantity        Int
+  notes           String
+  createdById     String?
+  createdAt       DateTime @default(now())
+  updatedAt       DateTime @updatedAt
+  item            InventoryItem @relation(fields: [itemId], references: [id], onDelete: Cascade)
+  fromWarehouse   Warehouse @relation("InventoryTransferFromWarehouse", fields: [fromWarehouseId], references: [id], onDelete: Restrict)
+  fromLocation    WarehouseLocation @relation("InventoryTransferFromLocation", fields: [fromLocationId], references: [id], onDelete: Restrict)
+  toWarehouse     Warehouse @relation("InventoryTransferToWarehouse", fields: [toWarehouseId], references: [id], onDelete: Restrict)
+  toLocation      WarehouseLocation @relation("InventoryTransferToLocation", fields: [toLocationId], references: [id], onDelete: Restrict)
+  createdBy       User? @relation("InventoryTransferCreatedBy", fields: [createdById], references: [id], onDelete: SetNull)
+
+  @@index([itemId, createdAt])
+}
+
+model InventoryReservation {
+  id          String   @id @default(cuid())
+  itemId      String
+  warehouseId String?
+  locationId  String?
+  workOrderId String?
+  sourceType  String
+  sourceId    String?
+  quantity    Int
+  status      String   @default("ACTIVE")
+  notes       String
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+  item        InventoryItem @relation(fields: [itemId], references: [id], onDelete: Cascade)
+  warehouse   Warehouse? @relation(fields: [warehouseId], references: [id], onDelete: SetNull)
+  location    WarehouseLocation? @relation(fields: [locationId], references: [id], onDelete: SetNull)
+  workOrder   WorkOrder? @relation(fields: [workOrderId], references: [id], onDelete: Cascade)
+
+  @@index([itemId, status, createdAt])
+  @@index([warehouseId, locationId, status])
+  @@index([workOrderId, status])
+}
+
 model Vendor {
   id           String   @id @default(cuid())
   name         String
@@ -480,6 +534,7 @@ model WorkOrder {
   operations        WorkOrderOperation[]
   materialIssues    WorkOrderMaterialIssue[]
   completions       WorkOrderCompletion[]
+  reservations      InventoryReservation[]
 
   @@index([itemId, createdAt])
   @@index([projectId, dueDate])