形象：检查重名

shared/db/Role.ts

@@ -555,6 +555,11 @@ export default class Role extends BaseModel {
         const result = await RoleModel.findOneAndUpdate({roleId}, { $pull: { heads: { id: id }, $push: { heads: figure } }}, {new: true}).lean();
         return result
     }
+
+    public static async checkName(roleName: string, serverId: number) {
+        const role = await RoleModel.findOne({ roleName, serverId }).lean();
+        return !!role;
+    }
 }
 
 export const RoleModel = getModelForClass(Role);