refactor: update code gen strategy (customer)

src/controllers/customer-controller.ts

@@ -122,13 +122,6 @@ export class CustomerController extends Controller {
 
   @Post()
   async create(@Request() req: RequestWithUser, @Body() body: CustomerCreate) {
-    const last = await prisma.customer.findFirst({
-      orderBy: { createdAt: "desc" },
-      where: { customerType: body.customerType },
-    });
-
-    const code = `${body.customerType}${(+(last?.code.slice(-6) || 0) + 1).toString().padStart(6, "0")}`;
-
     const { customerBranch, ...payload } = body;
 
     const provinceId = body.customerBranch?.reduce<string[]>((acc, cur) => {
@@ -173,7 +166,20 @@ export class CustomerController extends Controller {
       );
     }
 
-    const record = await prisma.customer.create({
+    const record = await prisma.$transaction(
+      async (tx) => {
+        const last = await tx.runningNo.upsert({
+          where: {
+            key: `CUSTOMER_${body.customerType}`,
+          },
+          create: {
+            key: `CUSTOMER_${body.customerType}`,
+            value: 1,
+          },
+          update: { value: { increment: 1 } },
+        });
+
+        return await prisma.customer.create({
           include: {
             branch: {
               include: {
@@ -185,7 +191,7 @@ export class CustomerController extends Controller {
           },
           data: {
             ...payload,
-        code,
+            code: `${last.key.slice(9)}${last.value.toString().padStart(6, "0")}`,
             branch: {
               createMany: {
                 data:
@@ -201,6 +207,9 @@ export class CustomerController extends Controller {
             updateBy: req.user.name,
           },
         });
+      },
+      { isolationLevel: Prisma.TransactionIsolationLevel.Serializable },
+    );
 
     this.setStatus(HttpStatus.CREATED);