update

app/model/business/lessonStudent.js

@@ -11,7 +11,7 @@ const lessonStudent = {
   is_try: { type: String, required: false, default: '0', zh: '是否试课' }, // 0:非试课;1:试课
   try_status: { type: String, default: '0', zh: '试课审核状态' }, // 0:未审核;1:审核通过;2审核拒绝
   is_pay: { type: String, default: '0', zh: '是否已支付' }, // 0:未支付;1:已支付:-1:支付失败:-2已退款
-  pay_id: { type: Array, required: false, zh: '支付id', ref: 'PayOrder' }, //
+  pay_id: { type: String, required: false, zh: '支付id', ref: 'PayOrder' }, //
   config: { type: Array, required: false, zh: '学生与教练关系表的设置快照' }, //
 };
 const schema = new Schema(lessonStudent, { toJSON: { virtuals: true } });