將 json 輸出列印到單行，以逗號分隔

我是 JQ 的新手，我有以下 json 文件

  [
  {
    "userId" : "jens",
    "firstName" : "jens",
    "lastName" : "jens",
    "emailAddress" : "admin@example.org",
    "source" : "default",
    "status" : "active",
    "readOnly" : false,
    "roles" : [ "reader" ],
    "externalRoles" : [ ]
  }, {
    "userId" : "admin",
    "firstName" : "Administrator",
    "lastName" : "User",
    "emailAddress" : "admin@example.org",
    "source" : "default",
    "status" : "changepassword",
    "readOnly" : false,
    "roles" : [ "app-admin" ],
    "externalRoles" : [ ]
  }]  

現在我想按以下格式列印

"userId" : "jens","roles" : [ "reader" ]
"userId" : "admin", "roles" : [ "app-admin" ],

我怎樣才能做到這一點？我試過這個命令

jq -r '.[].userId,.[].roles'

但它像下面一樣分散數據

jens
admin
[]
[
 "reader",
 "app-admins",
]

請指導我如何獲得上述輸出。

如果你這樣做

jq -c '.[] | {userid: .userId, roles: .roles}'

你會得到

{"userid":"jens","roles":["reader"]}
{"userid":"admin","roles":["app-admin"]}

該-c標誌會將每個對象放在自己的行上，因此只要您沒有嵌套對象，這應該可以滿足您的要求。後處理，例如擺脫大括號：

jq -c '.[] | {userid: .userId, roles: .roles}' | sed -e 's/^{//g' -e 's/}$//g'

生產

"userid":"jens","roles":["reader"]
"userid":"admin","roles":["app-admin"]

引用自：https://unix.stackexchange.com/questions/701485