固定证书发证单位来源

backend/app/api/routes/admin_certificates.py

@@ -85,7 +85,7 @@ def create_certificate(
         course_start_date=payload.course_start_date,
         course_end_date=payload.course_end_date,
         issue_date=payload.issue_date,
-        issuer_name=payload.issuer_name or project.default_issuer_name,
+        issuer_name=project.default_issuer_name,
         remark=payload.remark,
     )
     db.add(certificate)

backend/app/schemas/certificate.py

@@ -13,7 +13,6 @@ class CertificateCreate(BaseModel):
     course_start_date: date
     course_end_date: date
     issue_date: date
-    issuer_name: str = Field(min_length=1, max_length=128)
     remark: str | None = None
 
     @field_validator("project_code")

backend/tests/test_import_rules.py

@@ -84,5 +84,16 @@ def test_certificate_create_rejects_reversed_course_period():
             course_start_date="2026-06-30",
             course_end_date="2026-06-01",
             issue_date="2026-07-05",
-            issuer_name="测试单位",
         )
+
+
+def test_certificate_create_uses_project_issuer_without_manual_input():
+    certificate = CertificateCreate(
+        learner_id=1,
+        project_code="DBY",
+        course_start_date="2026-06-01",
+        course_end_date="2026-06-30",
+        issue_date="2026-07-05",
+    )
+
+    assert "issuer_name" not in certificate.model_dump()