自引用的结构体怎么存

[atheima]

type TreeNode struct {

ID       uint `gorm:"primaryKey"`
TreeID   uint
Label    string
ParentID *uint
Children []TreeNode `gorm:"foreignKey:ParentID"`

} 这样的结构体怎么存，直接保存会报错
Error 1452 (23000): Cannot add or update a child row: a foreign key constraint fails (lianxi.tree_nodes, CONSTRAINT fk_trees_children FOREIGN KEY (tree_id) REFERENCES trees (id))
以下是具体代码
package main

import (
"gorm.io/driver/mysql"
"gorm.io/gorm"
"log"
)

type Visualization struct {
ID uint gorm:"primaryKey"
Name string
Note string
Time string
Tree Tree gorm:"foreignKey:VisualizationID"
}

type Tree struct {
ID uint gorm:"primaryKey"
VisualizationID uint
Children []TreeNode gorm:"foreignKey:TreeID"
}

type TreeNode struct {
ID uint gorm:"primaryKey"
TreeID uint
Label string
ParentID *uint
Children []TreeNode gorm:"foreignKey:ParentID"
}

func main() {
dsn := "root:root@tcp(127.0.0.1:3306)/lianxi?charset=utf8mb4&parseTime=True&loc=Local"
db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{
//Logger: logger.Default.LogMode(logger.Info), // 设置日志级别为信息级别
})
if err != nil {
panic("failed to connect database")
}

// Migrate the schema
err = db.AutoMigrate(&Visualization{}, &Tree{}, &TreeNode{})
if err != nil {
	log.Fatal("Failed to migrate: ", err)
}
createVisualization(db)

}

func createVisualization(db *gorm.DB) {
visualization := Visualization{
Name: "Visualization 1",
Note: "Sample note",
Time: "2023-01-01",
Tree: Tree{
Children: []TreeNode{
{
Label: "Node 1",
Children: []TreeNode{
{Label: "Node 1-1"},
{Label: "Node 1-2"},
},
},
{
Label: "Node 2",
},
},
},
}

db.Create(&visualization)

}

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