chore: add some

src/common/transformers/decimal.transformer.ts

@@ -1,13 +1,22 @@
 // eslint-disable-next-line import/no-named-as-default
 import Decimal from "decimal.js";
+import { ValueTransformer } from "typeorm";
 
-export class DecimalTransformer {
-  to(value: Decimal | string | number): string {
-    return new Decimal(value).toString();
+export class DecimalTransformer implements ValueTransformer {
+  // to(value: Decimal | string | number): string {
+  //   return new Decimal(value).toString();
+  // }
+
+  // from(value: string): number {
+  //   return new Decimal(value).toNumber();
+  // }
+
+  to(value: Decimal | null): string | null {
+    return value ? value.toString() : "0"; // Ensure it's always a valid number
   }
 
-  from(value: string): number {
-    return new Decimal(value).toNumber();
+  from(value: string | null): number {
+    return value ? new Decimal(value).toNumber() : new Decimal(0).toNumber(); // Default to 0 if null
   }
 }