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如何从编码的 JSON 对象中提取字段

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如何从编码的 JSON 对象中提取字段

您好，我正在尝试从以下 JSON 数据中提取令牌last_name：first_namephone

{"message":"{\"_\":\"user\",\"pFlags\":{\"contact\":true},\"flags\":2167,\"id\":95384129,\"access_hash\":\"780828213343231334\",\"first_name\":\"xaa\",\"last_name\":\"xz\",\"phone\":\"989123930793\",\"photo\":{\"_\":\"userProfilePhoto\",\"photo_id\":\"409671715068685579\",\"photo_small\":{\"_\":\"fileLocation\",\"dc_id\":4,\"volume_id\":\"455930331\",\"local_id\":281464,\"secret\":\"3283911659027961987\"},\"photo_big\":{\"_\":\"fileLocation\",\"dc_id\":4,\"volume_id\":\"455930331\",\"local_id\":281466,\"secret\":\"3533047346646019161\"}},\"status\":{\"_\":\"userStatusLastMonth\"}}","phone":"989123930793","@version":"1","typ":"tg_contacts","access_hash":"780828213343231334","id":95384129,"@timestamp":"2020-01-26T13:53:31.091Z","path":"/home/user/mirror2/users_5d3de570e549953b6163eb0f.log","type":"redis","flags":2167,"host":"ubuntu","imported_from":"tg"}

这是我的命令

jq -r '[.first_name, .last_name, .phone]|@csv'

我如何只能提取字段phone，我不知道为什么我不能提取first_name和last_name。

答案1

如果你试试

jq -r '.' file.json

您会看到没有名字和姓氏，只有电话号码。

{
  "message": "{\"_\":\"user\",\"pFlags\":{\"contact\":true},\"flags\":2167,\"id\":95384129,\"access_hash\":\"780828213343231334\",\"first_name\":\"xaa\",\"last_name\":\"xz\",\"phone\":\"989123930793\",\"photo\":{\"_\":\"userProfilePhoto\",\"photo_id\":\"409671715068685579\",\"photo_small\":{\"_\":\"fileLocation\",\"dc_id\":4,\"volume_id\":\"455930331\",\"local_id\":281464,\"secret\":\"3283911659027961987\"},\"photo_big\":{\"_\":\"fileLocation\",\"dc_id\":4,\"volume_id\":\"455930331\",\"local_id\":281466,\"secret\":\"3533047346646019161\"}},\"status\":{\"_\":\"userStatusLastMonth\"}}",
  "phone": "989123930793",
  "@version": "1",
  "typ": "tg_contacts",
  "access_hash": "780828213343231334",
  "id": 95384129,
  "@timestamp": "2020-01-26T13:53:31.091Z",
  "path": "/home/user/mirror2/users_5d3de570e549953b6163eb0f.log",
  "type": "redis",
  "flags": 2167,
  "host": "ubuntu",
  "imported_from": "tg"
}

您要查找的字段位于 中.message，它是一个字符串，一个编码的 JSON 对象。

jq有fromjson您可以使用内置函数并将其作为 JSON 获取：

jq -r '.message | fromjson | [.first_name, .last_name, .phone]|@csv' file.json
"xaa","xz","989123930793"

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