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) => {
@@ -173,34 +166,50 @@ export class CustomerController extends Controller {
       );
     }
 
-    const record = await prisma.customer.create({
+    const record = await prisma.$transaction(
-      include: {
+      async (tx) => {
-        branch: {
+        const last = await tx.runningNo.upsert({
+          where: {
+            key: `CUSTOMER_${body.customerType}`,
+          },
+          create: {
+            key: `CUSTOMER_${body.customerType}`,
+            value: 1,
+          },
+          update: { value: { increment: 1 } },
+        });
+
+        return await prisma.customer.create({
           include: {
-            province: true,
+            branch: {
-            district: true,
+              include: {
-            subDistrict: true,
+                province: true,
+                district: true,
+                subDistrict: true,
+              },
+            },
           },
-        },
+          data: {
-      },
+            ...payload,
-      data: {
+            code: `${last.key.slice(9)}${last.value.toString().padStart(6, "0")}`,
-        ...payload,
+            branch: {
-        code,
+              createMany: {
-        branch: {
+                data:
-          createMany: {
+                  customerBranch?.map((v, i) => ({
-            data:
+                    ...v,
-              customerBranch?.map((v, i) => ({
+                    branchNo: `${i + 1}`,
-                ...v,
+                    createdBy: req.user.name,
-                branchNo: `${i + 1}`,
+                    updateBy: req.user.name,
-                createdBy: req.user.name,
+                  })) || [],
-                updateBy: req.user.name,
+              },
-              })) || [],
+            },
+            createdBy: req.user.name,
+            updateBy: req.user.name,
           },
-        },
+        });
-        createdBy: req.user.name,
-        updateBy: req.user.name,
       },
-    });
+      { isolationLevel: Prisma.TransactionIsolationLevel.Serializable },
+    );
 
     this.setStatus(HttpStatus.CREATED);