JMESPath
一个json数据的查询语言
Github： https://github.com/jmespath
官网（文档、示例等）： https://jmespath.org/
属性
属性1.属性2.属性3.属性4
- a.b.c
- a.b.c[0].d[1][0]
数组
[start:stop:step]
- [1]
- [0:5]
- [:5]
- [::2]
投影 Projections（可理解为map）
分为如下几种投影
- List Projections
- Slice Projections
- Object Projections
- Flatten Projections
- Filter Projections
列表投影
示例数据
{
"people": [
{"first": "James", "last": "d"},
{"first": "Jacob", "last": "e"},
{"first": "Jayden", "last": "f"},
{"missing": "different"}
],
"foo": {"bar": "baz"}
}people[*].first
[
"James",
"Jacob",
"Jayden"
]分割投影
people[:2].first
[
"James",
"Jacob"
]对象投影
ops.*.numArgs
扁平化投影
reservations[*].instances[*].state
过滤投影
machines[?state=='running'].name
管道符投影
people[*].first | [0]
多字段
people[].[name, state.name]
多字段重命名
people[].{Name: name, State: state.name}
函数
length(people)
max_by(people, &age).name
myarray[?contains(@, 'foo') == `true`]