如何 select 仅包含包含多于 N 个元素的数组的对象

Question

仅捕获以下数组中的第二个对象的正确 JMESPath 表达式是什么（因为它的 topics 数组中有超过 2 个对象）：

[{
  "topics": [
    "just one"
  ]
 },
 {
  "topics": [
    "first",
    "second",
    "third"
  ]
 }
]

我要吐出来

{
  "topics": [
    "first",
    "second",
    "third"
  ]
}

我试过 [? length(topics) > 2] 但 jp 抱怨：

SyntaxError: Invalid token: tNumber
[? length(topics) > 2]
                    ^

Answer 1

对于输入：

[{
  "topics": [
    "just one"
  ]
 },
 {
  "topics": [
    "first",
    "second",
    "third"
  ]
 }
]

使用 jmesExpression:

[?length(topics)>'2']

获取输出：

[
  {
    "topics": [
      "first",
      "second",
      "third"
    ]
  }
]

how to select only objects that contain an array with more than N elements