fix: clarify signature reporting status

api/src/dictionaries/dictionaries.service.spec.ts

@@ -128,4 +128,20 @@ describe('DictionariesService', () => {
     );
     expect(prisma.drainageField.create).toHaveBeenCalledTimes(1);
   });
+
+  it('only accepts Arabic numerals and English letters in report field codes', async () => {
+    const prisma = createPrismaMock();
+    const service = new DictionariesService(prisma as never);
+
+    await expect(service.createDrainageField({ code: 'License2026', name: '营业执照', fieldType: 'image' })).resolves.toEqual(
+      expect.objectContaining({ code: 'License2026' }),
+    );
+    expect(() => service.createDrainageField({ code: 'license_code', name: '营业执照', fieldType: 'image' })).toThrow(
+      'code must contain only Arabic numerals and English letters',
+    );
+    expect(() => service.createDrainageField({ code: '营业执照', name: '营业执照', fieldType: 'image' })).toThrow(
+      'code must contain only Arabic numerals and English letters',
+    );
+    expect(prisma.drainageField.create).toHaveBeenCalledTimes(1);
+  });
 });

api/src/dictionaries/dictionaries.service.ts

@@ -255,12 +255,16 @@ export class DictionariesService {
   }
 
   createDrainageField(data: CreateDrainageFieldDto) {
+    const code = data.code?.trim();
+    if (!code || !/^[A-Za-z0-9]+$/.test(code)) {
+      throw new BadRequestException('code must contain only Arabic numerals and English letters');
+    }
     if (!['string', 'image', 'file'].includes(data.fieldType)) {
       throw new BadRequestException('fieldType must be string, image or file');
     }
     return this.prisma.drainageField.create({
       data: {
-        code: data.code,
+        code,
         name: data.name,
         fieldType: data.fieldType,
         required: data.required ?? false,