diff --git a/internal/infra/models/medication.go b/internal/infra/models/medication.go
index 1f0b752..c6ead4a 100644
--- a/internal/infra/models/medication.go
+++ b/internal/infra/models/medication.go
@@ -90,7 +90,7 @@ type GroupMedicationLog struct {
 	TargetCount  int                  `gorm:"not null;comment:用药对象数量"`
 	Reason       MedicationReasonType `gorm:"size:20;not null;comment:用药原因"`
 	Description  string               `gorm:"size:255;comment:具体描述,如'治疗呼吸道病'"`
-	Operator     string               `gorm:"size:50;comment:操作员"`
+	OperatorID   uint                 `gorm:"comment:操作员ID"`
 	HappenedAt   time.Time            `gorm:"primaryKey;comment:用药时间"`
 }
 
diff --git a/internal/infra/models/pig.go b/internal/infra/models/pig.go
index 485fff7..037b507 100644
--- a/internal/infra/models/pig.go
+++ b/internal/infra/models/pig.go
@@ -70,7 +70,7 @@ type PigBatchLog struct {
 	AfterCount      int           `gorm:"not null;comment:变更后总数"`
 	BeforeSickCount int           `gorm:"not null;comment:变更前病猪数"`
 	AfterSickCount  int           `gorm:"not null;comment:变更后病猪数"`
-	Operator        string        `gorm:"size:50;comment:操作员"`
+	OperatorID      uint          `gorm:"comment:操作员ID"`
 	HappenedAt      time.Time     `gorm:"primaryKey;comment:事件发生时间"`
 }