所以事情是,我有一个看起来像这样的JSON:
{
"country": "USA",
"states": [
{
"stateName": "California",
"timeZone": "UTC-8",
"cities": [
{
"cityName": "Los Angeles"
},
{
"cityName": "San Diego"
}
]
},
{
"stateName": "Texas",
"timeZone": "UTC-8",
"cities": [
{
"cityName": "Houston"
},
{
"cityName": "Dallas"
}
]
}
]
}
(那个json只是一个例子,不要当真)
我需要做的是列出所有城市,还要从父级中获取“ stateName”字段,然后以某种方式将其放入city对象中,从而得到如下结果:
[
{
"stateName": "California",
"cityName": "Los Angeles"
},
{
"stateName": "Texas",
"cityName": "Houston"
},
{
"stateName": "Texas",
"cityName": "Dallas"
},
{
"stateName": "California",
"cityName": "San Diego"
}
]
我尝试以几种不同的方式使用内置合并功能,但是除了该功能的文档不是很直观之外,我没有得到任何结果。
我的一次失败尝试:
merge(`states[].cities[]`, `states[].{stateName: stateName}`)
有什么想法吗?
谢谢。
答案 0 :(得分:0)
您不能使用jmespath做到这一点。检查一下:https://github.com/jmespath/jmespath.js/issues/22#issuecomment-394157797
但是,您现在可以执行以下操作:
states[].{stateName: stateName, cities: cities[].cityName}[]
产生如下输出:
[
{
"stateName": "California",
"cities": [
"Los Angeles",
"San Diego"
]
},
{
"stateName": "Texas",
"cities": [
"Houston",
"Dallas"
]
}
]
答案 1 :(得分:0)
我找到了一个解决方案,但是您需要在此处输入一些硬编码值:
states[].{stateName: stateName, cities: cities[]}[] | @[*].{stateName: {stateName: stateName}, cities: cities} | @[*].[merge(stateName,cities[0]),merge(stateName,cities[1])][]
它给出:
[
{
"stateName": "California",
"cityName": "Los Angeles"
},
{
"stateName": "California",
"cityName": "San Diego"
},
{
"stateName": "Texas",
"cityName": "Houston"
},
{
"stateName": "Texas",
"cityName": "Dallas"
}
]