如何基于Javascript中的嵌套值过滤数组 [英] How to filter array based on nested value in Javascript

问题描述

我有一个数组，正在尝试根据某个嵌套值进行过滤，而没有获取任何其他元素.

I have an array which I'm trying to filter based on a certain nested value, without getting any other elements.

const arrayData = [ 
{ 
    country: "Country X", 
    games: [ 
        { 
            gameTitle: 'Game1', 
            players: [{ name: 'John', status:'Active' },{ name: 'Rob', status:'Suspended' }] 
        }, 
        { 
            gameTitle: 'Game2', 
            players: [{ name: 'Saly', status:'Blocked' }] 
        }, 
    ] 
}, 
{ 
    country: "Country Y", 
    games: [ 
        { 
            gameTitle: 'Game1', 
            players: [{ name: 'Sindy', status:'Pending' },{ name: 'someone', status:'Rejected' }] 
        }, 
        { 
            gameTitle: 'Game2', 
            players: [{ name: 'Alex', status:'New' },{ name: 'Nic', status:'Old' }] 
        }, 
    ] 
}, 
]; 

我尝试过的事情:

let output = arrayData.filter(eachVal => { 
let opt = eachVal.games.some(( 
    { players }) => players 
    .some(({ status}) => status === 'Active')); 
return opt; 
}) 

查找具有值状态的所有玩家的预期结果:有效" :

Expected result for finding all players with value status : 'Active':

{ 
country: "Country X", 
games: [ 
    { 
        gameTitle: 'Game1', 
        players: [{ name: 'John', status:'Active' }] 
    }
] 
}

但是结果:

[{"country":"Country X","games":[{"gameTitle":"Game1","players":[{"name":"John","status":"Active"},{"name":"Rob","status":"Suspended"}]},{"gameTitle":"Game2","players":[{"name":"Saly","status":"Blocked"}]}]}]

推荐答案

这很容易.您只需要一些 map 和 filter :

It's quite easy. You just need some map and filter:

const arrayData = [ 
{ 
    country: "Country X", 
    games: [ 
        { 
            gameTitle: 'Game1', 
            players: [{ name: 'John', status:'Active' },{ name: 'Rob', status:'Suspended' }] 
        }, 
        { 
            gameTitle: 'Game2', 
            players: [{ name: 'Saly', status:'Blocked' }] 
        }, 
    ] 
}, 
{ 
    country: "Country Y", 
    games: [ 
        { 
            gameTitle: 'Game1', 
            players: [{ name: 'Sindy', status:'Pending' },{ name: 'someone', status:'Rejected' }] 
        }, 
        { 
            gameTitle: 'Game2', 
            players: [{ name: 'Alex', status:'New' },{ name: 'Nic', status:'Old' }] 
        }, 
    ] 
}, 
];

/*------------------------------- This is the answer -------------------------------*/
let result = arrayData.map(a => ({...a, games: a.games.map(g => ({...g, players: g.players.filter(p => p.status === 'Active')})).filter(g => g.players.length)})).filter(a => a.games.length)
/*----------------------------------------------------------------------------------*/
console.log(result)

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