fix

things/nest-typeorm/src/entities/decorators/relation.ts

@@ -30,6 +30,7 @@ export const RelationColumn = (
     IsInt(),
     IsPositive(),
   ]);
+  
 export const StringRelationColumn = (
   description = '对应编号',
   notNull = false,
@@ -38,7 +39,12 @@ export const StringRelationColumn = (
 ) =>
   MergePropertyDecorators([
     Column('varchar', { length: 32, nullable: !notNull, ...columnExtras }),
-    ApiProperty({ type: String, description, ...propertyExtras }),
+    ApiProperty({
+      type: String,
+      required: notNull,
+      description,
+      ...propertyExtras,
+    }),
     ...(notNull ? [] : [IsOptional()]),
     IsNotEmpty(),
   ]);