PO logic

server/prisma/schema.prisma

@@ -122,6 +122,7 @@ model InventoryItem {
   unitOfMeasure String
   isSellable    Boolean  @default(true)
   isPurchasable Boolean  @default(true)
+  preferredVendorId String?
   defaultCost   Float?
   defaultPrice  Float?
   notes         String
@@ -138,6 +139,9 @@ model InventoryItem {
   operations InventoryItemOperation[]
   reservations InventoryReservation[]
   transfers InventoryTransfer[]
+  preferredVendor Vendor? @relation(fields: [preferredVendorId], references: [id], onDelete: SetNull)
+
+  @@index([preferredVendorId])
 }
 
 model Warehouse {
@@ -325,6 +329,7 @@ model Vendor {
   contactEntries CrmContactEntry[]
   contacts     CrmContact[]
   purchaseOrders PurchaseOrder[]
+  preferredSupplyItems InventoryItem[]
 }
 
 model CrmContactEntry {
@@ -417,6 +422,8 @@ model SalesOrder {
   shipments      Shipment[]
   projects       Project[]
   revisions      SalesOrderRevision[]
+  workOrders     WorkOrder[]
+  purchaseOrderLines PurchaseOrderLine[]
 }
 
 model SalesOrderLine {
@@ -432,6 +439,8 @@ model SalesOrderLine {
   updatedAt     DateTime @updatedAt
   order         SalesOrder @relation(fields: [orderId], references: [id], onDelete: Cascade)
   item          InventoryItem @relation(fields: [itemId], references: [id], onDelete: Restrict)
+  workOrders    WorkOrder[]
+  purchaseOrderLines PurchaseOrderLine[]
 
   @@index([orderId, position])
 }
@@ -519,6 +528,8 @@ model WorkOrder {
   workOrderNumber   String   @unique
   itemId            String
   projectId         String?
+  salesOrderId      String?
+  salesOrderLineId  String?
   warehouseId       String
   locationId        String
   status            String
@@ -530,6 +541,8 @@ model WorkOrder {
   updatedAt         DateTime @updatedAt
   item              InventoryItem @relation(fields: [itemId], references: [id], onDelete: Restrict)
   project           Project? @relation(fields: [projectId], references: [id], onDelete: SetNull)
+  salesOrder        SalesOrder? @relation(fields: [salesOrderId], references: [id], onDelete: SetNull)
+  salesOrderLine    SalesOrderLine? @relation(fields: [salesOrderLineId], references: [id], onDelete: SetNull)
   warehouse         Warehouse @relation(fields: [warehouseId], references: [id], onDelete: Restrict)
   location          WarehouseLocation @relation(fields: [locationId], references: [id], onDelete: Restrict)
   operations        WorkOrderOperation[]
@@ -539,6 +552,8 @@ model WorkOrder {
 
   @@index([itemId, createdAt])
   @@index([projectId, dueDate])
+  @@index([salesOrderId, dueDate])
+  @@index([salesOrderLineId, dueDate])
   @@index([status, dueDate])
   @@index([warehouseId, createdAt])
 }
@@ -650,6 +665,8 @@ model PurchaseOrderLine {
   id            String   @id @default(cuid())
   purchaseOrderId String
   itemId        String
+  salesOrderId  String?
+  salesOrderLineId String?
   description   String
   quantity      Int
   unitOfMeasure String
@@ -659,9 +676,13 @@ model PurchaseOrderLine {
   updatedAt     DateTime @updatedAt
   purchaseOrder PurchaseOrder @relation(fields: [purchaseOrderId], references: [id], onDelete: Cascade)
   item          InventoryItem @relation(fields: [itemId], references: [id], onDelete: Restrict)
+  salesOrder    SalesOrder? @relation(fields: [salesOrderId], references: [id], onDelete: SetNull)
+  salesOrderLine SalesOrderLine? @relation(fields: [salesOrderLineId], references: [id], onDelete: SetNull)
   receiptLines  PurchaseReceiptLine[]
 
   @@index([purchaseOrderId, position])
+  @@index([salesOrderId, position])
+  @@index([salesOrderLineId, position])
 }
 
 model PurchaseReceipt {