javascript - Object.assign 嵌套属性

Question

我有以下类(class):

class Term {
    constructor(id, title, snippets){
        this.id = id
        this.title = title
        this.snippets = snippets
    }
}

class Snippet {
    constructor(id, text) {
        this.id = id
        this.text = text
    }
}

我有一个 JSON 对象，例如:

[{
    "id": 1,
    "title": "response",
    "snippets": [{
        "id": 2,
        "text": "My response"
    }, {
        "id": 3,
        "text": "My other response"
    }]
}]

我可以创建一个新的 Term 对象，如下所示:

let term = Object.assign(new Term, result[0])

但是，snippets属性不会创建Snippet对象由此。最好的方法是什么？

Answer 1

您可以在数组本身中使用 Object.assign 重新映射片段:

let term = Object.assign(new Term, {
    ...result[0],
    snippets: result[0].snippets.map(
        snip => Object.assign(new Snippet, snip))
})

class Term {
    constructor(id, title, snippets){
        this.id = id
        this.title = title
        this.snippets = snippets
    }
}

class Snippet {
    constructor(id, text) {
        this.id = id
        this.text = text
        this.asdf = 'test'
    }
}

var result = [{
    "id": 1,
    "title": "response",
    "snippets": [{
        "id": 2,
        "text": "My response"
    }, {
        "id": 3,
        "text": "My other response"
    }]
}]

let term = Object.assign(new Term, {...result[0], snippets: result[0].snippets.map(snip => Object.assign(new Snippet, snip))})

console.log(term);