这是我的标签表格:
id name parent
--------------------------
1 parent1 null
2 a parent1
3 b parent1
4 parent2 null
5 c parent2
6 d parent1
7 parent3 null
8 e parent3
9 f parent2
我应该如何创建一个集合,让每个标签都放在它的父标签下面?我的意思是:
Collection {#499 ▼
#items: array:22 [▼
0 => tag {#524 ▶} //parent1
1 => tag {#525 ▶} //a
2 => tag {#526 ▶} //b
3 => tag {#527 ▶} //d
4 => tag {#528 ▶} //parent2
5 => tag {#529 ▶} //c
6 => tag {#530 ▶} //f
7 => tag {#530 ▶} //parent3
8 => tag {#530 ▶} //e
]
}
thanks.