linux - 如何使用 if else 重写 jq 中的输出

Question

我正在尝试更改它，以便当 CrashTested 为 false 时，它输出 no，当 true 时，则输出 yes

这是 json:

{
    "Cars": [
        {   "Name": "Toyota Prius",
            "ID": 1,
            "CrashTested": "false"
},

        {   "Name": "Honda Accord",
            "ID": 2,
            "CrashTested": "true"
},
        {   "Name": "VW Beetle",
            "ID": 3,
            "CrashTested": "false"
},

        {   "Name": "Acura TL",
            "ID": 4,
            "CrashTested": "true"
},

        {   "Name": "Dodge Charger",
            "ID": 5,
            "CrashTested": "false"
},
        {   "Name": "Ford Focus",
            "ID": 6,
            "CrashTested": "true"
}
   ]
}

我尝试了以下方法:

$ jq -r '.Cars[] | .Name, .ID, map(if .CrashTested == "true" then "yes" elif .CrashTested == "false" then "no" else "unknown" end)' < cars.json
Toyota Prius
1
jq: error (at <stdin>:31): Cannot index string with string "CrashTested"

我正在尝试获得以下输出:

"Toyota Prius"
1
"no"
"Honda Accord"
2
"yes"
...

我在jq版本jq-1.5-1

我应该使用 map() 还是换一种方式？

Answer 1

如果您删除 map，那么您将获得指定值的流。不过，按照以下几行写一些东西可能更有意义:

.Cars[]
| [.Name, .ID, (if .CrashTested == "true" then "yes" elif .CrashTested == "false" then "no" else "unknown" end)]
| @csv 

或:

def yn:
  if . == true or . == "true" then "yes"
  elif . == false or . == "false" then "no"
  else "unknown"
  end;

.Cars[]
| [.Name, .ID, (.CrashTested | yn) ]