使用jq解析JSON文件时where子句问题

Question

I'm trying to parse a JSON file which has 6 million lines. Which something looks like this:

temp.json

{
  "bbc.com": {
    "Reputation": "2.1",
    "Rank": "448",
    "Category": [
      "News"
    ]
  },
  "amazon.com": {
    "Reputation": "2.1",
    "Rank": "448",
    "Category": [
      "Shopping"
    ]
  }
}

I know how to parse the "Keys" alone. To get "Keys" of this JSON structure, I tried,

jq -r 'keys[]' temp.json 

Result :

amazon.com
bbc.com

To get the "Category" in the above JSON file . I tried ,

jq -r '.[].Category[]' temp.json 

Result :

Shopping
News

How to get the "Keys" where the "Category" only with "Shopping"?

Answer 1

使用to_entries函数，如下所示：

jq -r 'to_entries[] | select(.value.Category | index("Shopping") != null) | .key'

Answer 2

在这种特殊情况下， to_entries及其开销，同时仍然可以提供简洁明了的解决方案：

keys[] as $k | select( .[$k].Category | index("Shopping") != null) | $k