JQ：如何只获取 JSON 对象的一部分？ [复制]

Question

我怎样才能得到我想要的输出？我不知道如何保留对象名称（键）。

我是 jq 的新手，我尝试了 jq 的 select/flatten/map/","/"keys as $k".../etc 的几种风格。但我什么也没有。

输入

$ echo '{"apples": {"color":"green",  "count":3}, "bananas": {"color":"yellow", "count":4}, "cherries": {"color":"red"}}' \  
  | jq .
{
  "apples": {
    "color": "green",
    "count": 3
  },
  "bananas": {
    "color": "yellow",
    "count": 4
  },
  "cherries": {
    "color": "red"
  }
}

实际输出

这是我得到的最好的，但对象名称不见了：

$ echo '{"apples": {"color":"green",  "count":3}, "bananas": {"color":"yellow", "count":4}, "cherries": {"color":"red"}}' \  
  | jq '.apples, .cherries'
{
  "color": "green",
  "count": 3
}
{
  "color": "red"
}

预期输出

这就是我想要的：

{"color":"yellow", "count":4}, "cherries": {"color":"red"}}' \  
  | jq #some-jq-magic-here
{
  "apples": {
    "color": "green",
    "count": 3
  },
  "cherries": {
    "color": "red"
  }
}

Answer 1

jq '{苹果，樱桃}'

我先尝试了点：jq '{.apples, .cherries}'。那没有用。

但是没有点它就可以正常工作：

$ echo '{
  "apples":   { "color":"green",  "count": 3 },
  "bananas":  { "color":"yellow", "count": 4 },
  "cherries": { "color":"red" }
}' | jq '{apples, cherries}'
{
  "apples": {
    "color": "green",
    "count": 3
  },
  "cherries": {
    "color": "red"
  }
}

相关： How do I select multiple fields in jq?

Answer 2

echo '...' | jq 'with_entries(select([.key] | inside(["apples", "cherries"])))'

谢谢https://stackoverflow.com/a/46293052/9216229