环境:JQ 1.5,Windows 64位。
我有以下JSON:
{
"unique": 1924,
"coordinates": [
{
"time": "2015-01-25T00:00:01.683",
"xyz": [
{
"z": 4,
"y": 2,
"x": 1,
"id": 99
},
{
"z": 9,
"y": 9,
"x": 8,
"id": 100
},
{
"z": 9,
"y": 6,
"x": 10,
"id": 101
}
]
},
{
"time": "2015-01-25T00:00:02.790",
"xyz": [
{
"z": 0,
"y": 3,
"x": 7,
"id": 99
},
{
"z": 4,
"y": 6,
"x": 2,
"id": 100
},
{
"z": 2,
"y": 9,
"x": 51,
"id": 101
}
]
}
]
}
并希望使用jq:
将其转换为此CSV格式unique,time,id,x,y,z
1924,"2015-01-25T00:00:01.683",99,1,2,4
1924,"2015-01-25T00:00:01.683",100,8,9,9
(依此类推)
我尝试过一些事情,例如:
jq -r '{unique: .unique, coordinates: .coordinates[].xyz[] | [.id, .x, .y, .z], time: .coordinates.[].time} | flatten | @csv'
给了我想要的JSON,但是每个id,x,y和z相乘(即每个唯一的行出现四次 - 对于id,x,y,z各一次)。
为数组指定一个数字,例如
jq -r '{unique: .unique, coordinates: .coordinates[0].xyz[] | [.id, .x, .y, .z], time: .coordinates.[0].time} | flatten | @csv'
给了我coordinates
数组的第一个索引,但我自然喜欢它们。
答案 0 :(得分:5)
第一步是将结果展平为行。
[{ unique } + (.coordinates[] | { time } + .xyz[])]
这将产生每行的对象数组:
[
{
"unique": 1924,
"time": "2015-01-25T00:00:01.683",
"id": 99,
"x": 1,
"y": 2,
"z": 4
},
{
"unique": 1924,
"time": "2015-01-25T00:00:01.683",
"id": 100,
"x": 8,
"y": 9,
"z": 9
},
{
"unique": 1924,
"time": "2015-01-25T00:00:01.683",
"id": 101,
"x": 10,
"y": 6,
"z": 9
},
{
"unique": 1924,
"time": "2015-01-25T00:00:02.790",
"id": 99,
"x": 7,
"y": 3,
"z": 0
},
...
]
然后,只需将此转换为csv行即可。
["unique","time","id","x","y","z"] as $fields | $fields, (.[] | [.[$fields[]]]) | @csv