Consider the following JSON:

{
    "expensive": 10,
    "abc":10
}

I would like to write a filter that returns true if the key abc equals 10, i.e. on the example above the answer is true, while on the following example it is false:

{
    "expensive": 10
}

because there is no such key abc.

I have tried these filters:

1. $[?(@ == 10)] returns [10,10] on the first json and [10] on the second, but I want to enforce the check on the abc field, i.e. the second should return nothing. how can this be achieved?

CodePudding user response：

I'm assuming you have an array of input objects and want to filter them.

[{
    "expensive": 10,
    "abc":10
}, {
    "expensive": 10
}]

Here $[?(@.abc == 10)] returns

[
  {
    "expensive": 10,
    "abc": 10
  }
]

and $[?(@.abc == 10)].expensive returns

[
  10
]