1 files changed, 6 insertions, 2 deletions
diff --git a/packages/pipeline/src/utils/transformers/number_to_bigint.ts b/packages/pipeline/src/utils/transformers/number_to_bigint.ts
index 85560c1f0..9736d7c18 100644
--- a/packages/pipeline/src/utils/transformers/number_to_bigint.ts
+++ b/packages/pipeline/src/utils/transformers/number_to_bigint.ts
@@ -9,8 +9,12 @@ const decimalRadix = 10;
 // https://github.com/typeorm/typeorm/issues/2400 for more information.
 export class NumberToBigIntTransformer implements ValueTransformer {
     // tslint:disable-next-line:prefer-function-over-method
-    public to(value: number): string {
-        return value.toString();
+    public to(value: number): string | null {
+        if (value === null || value === undefined) {
+            return null;
+        } else {
+            return value.toString();
+        }
     }
 
     // tslint:disable-next-line:prefer-function-over-method