使用normalizr
库之后我在应用程序的Redux状态下得到以下规范化的JSON对象结果:
{
sports: {
byId: {
1: {
id: 1,
name: 'Soccer',
slug: 'soccer'
},
2: {
id: 2,
name: 'Basketball',
slug: 'basketball'
},
3: {
id: 3,
name: 'American Football',
slug: 'american-football'
}
},
allIds: [
'1',
'2',
'3'
]
},
competitions: {
byId: {
'1': {
id: 1,
name: 'Competition 1',
short_name: 'Comp 1',
slug: 'comp-1',
sport: 1,
status: {
is_live: false
}
},
'2': {
id: 2,
name: 'Competition 2',
short_name: 'Comp 2',
slug: 'comp-2',
sport: 1,
status: {
is_live: true
}
},
'3': {
id: 3,
name: 'National Basketball League',
short_name: 'NBA',
slug: 'national-basketball-league',
sport_slug: 'basketball',
sport: 3,
status: {
is_live: true
}
}
},
allIds: [
'1',
'2',
'3'
]
}
我想要实现的目标:我想要一个competitions
列表,按sports
过滤/分类。
我该怎么做?
此外,我希望能够通过它competitions
对status.is_live
进行分组。
那么我怎样才能得到competitions
sport
分析列表,status.is_live
等于true而competitions
status.is_live
等于false?
任何帮助表示赞赏!感谢
答案 0 :(得分:0)
如果您不想使用lodash,则可以非常轻松地编写.groupBy
函数(example)。您需要循环输出对象并使用for重新分配其子值,而不是使用.mapValues
。
我在示例中使用了lodash,只是为了指出逻辑。
注意:我会删除原始响应中数据的分组,并让客户端单独执行此操作 - 更容易处理未排序的数组并过滤/映射而不是对来自具有冗余键的对象的值进行处理(因为它们以Id表示组)
let data = {
sports: {
byId: {
1: {
id: 1,
name: 'Soccer',
slug: 'soccer'
},
2: {
id: 2,
name: 'Basketball',
slug: 'basketball'
},
3: {
id: 3,
name: 'American Football',
slug: 'american-football'
}
},
allIds: [
'1',
'2',
'3'
]
},
competitions: {
byId: {
'1': {
id: 1,
name: 'Competition 1',
short_name: 'Comp 1',
slug: 'comp-1',
sport: 1,
status: {
is_live: false
}
},
'2': {
id: 2,
name: 'Competition 2',
short_name: 'Comp 2',
slug: 'comp-2',
sport: 1,
status: {
is_live: true
}
},
'3': {
id: 3,
name: 'National Basketball League',
short_name: 'NBA',
slug: 'national-basketball-league',
sport_slug: 'basketball',
sport: 3,
status: {
is_live: true
}
}
},
allIds: [
'1',
'2',
'3'
]
}
}
let competitions = Object.values(data.competitions.byId)
// _.chain(arr) keeps returning `lodash` objects
// so I don't have to call it separately for every action
let filteredCompetitions = _.chain(competitions)
.groupBy(i => i.status.is_live)
.mapValues(i => _.groupBy(i, 'sport'))
.value() // returns the final value
console.log(filteredCompetitions)
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>