Only update if amount

apps/api/src/app/account/account.service.ts

@@ -185,7 +185,7 @@ export class AccountService {
     currency: string;
     date: Date;
     userId: string;
-  }): Promise<Account> {
+  }) {
     const { balance, currency: currencyOfAccount } = await this.account({
       id_userId: {
         userId,
@@ -201,7 +201,8 @@ export class AccountService {
         date
       );
 
-    return this.prismaService.account.update({
+    if (amountInCurrencyOfAccount) {
+      await this.prismaService.account.update({
         data: {
           balance: new Big(balance).plus(amountInCurrencyOfAccount).toNumber()
         },
@@ -214,3 +215,4 @@ export class AccountService {
       });
     }
   }
+}