如何将对象数组推入数组

Posted 2023-02-22

【中文标题】如何将对象数组推入数组

【英文标题】：How to push object array in array

【发布时间】：2019-03-24 12:37:40

【问题描述】：

loggedUser as object in users 索引（未知）变量：

// This is the users index of a variable containing multiple users which have a `docs` array.
users: [
    id: '140255045', password: '72465091Be', email: '[e-mail]', tc: '1', dId: 1, name: 'Erkan', surname: 'Çalışkan', docs: [],
    id: '1', password: '1', email: '[e-mail]', tc: '1', dId: 1, name: 'Erkan', surname: 'Çalışkan', docs: [],
    id: '2', password: '2', email: '[e-mail]', tc: '1', dId: 2, name: 'Erkan', surname: 'Çalışkan', docs: [],
    id: '3', password: '3', email: '[e-mail]', tc: '1', dId: 2, name: 'Erkan', surname: 'Çalışkan', docs: []
]

这是我要压入对象的数组：

var docs = [
    
        type: '',
        piece: '',
        insti: '',
        desc: '',
        selected: '',
        date: ''
    
];

var a = this.docs.push(
    type: this.docs.type,
    piece: this.docs.piece,
    insti: this.docs.insti,
    desc: this.docs.desc,
    selected: this.docs.selected,
    date: today
);

this.loggedUser.docs.push(a);

console.log(this.loggedUser);

错误：无法读取未定义的属性“推送”

我想将docs 数组推送到loggedUser.docs 数组。

【问题讨论】：

您的 loggedUser 在您的数据对象中看起来像什么？

这似乎在语法上不正确，但很难判断它是否只是从其他地方剥离的代码片段。看起来您已经完成了定义具有用户和文档属性的对象的一半，但是您突然有了功能代码而没有终止对象定义？我可能希望在文档定义之后有一个逗号，然后可能是最后一位的函数定义？否则“this”指的是什么？

BTW - 错误基本上意味着它不知道 this.docs 是什么 - 它是未定义的。推送部分在这里是无关紧要的，直到您将未定义的位排除在外。

【参考方案1】：

将冒号 (:) 更改为等号 (=) 冒号用于将内容分配给对象或数组内的id。

users = [
    id:'140255045',password:'72465091Be',email:'[e-mail]',tc:'1',dId:1,name:'Erkan',surname:'Çalışkan',docs:[],
    id:'1',password:'1',email:'[e-mail]',tc:'1',dId:1,name:'Erkan',surname:'Çalışkan',docs:[],
    id:'2',password:'2',email:'[e-mail]',tc:'1',dId:2,name:'Erkan',surname:'Çalışkan',docs:[],
    id:'3',password:'3',email:'[e-mail]',tc:'1',dId:2,name:'Erkan',surname:'Çalışkan',docs:[]
  ]

【讨论】：

我认为users 是数据对象属性而不是局部变量

【参考方案2】：

如果users 是变量的索引，您的代码应如下所示：

// Schema for `this.loggeduser`

    id: '140255045',
    password: '72465091Be',
    email: '[e-mail]',
    tc: '1',
    dId:1,
    name: 'Erkan',
    surname: 'Çalışkan',
    docs:[]


// Declare docs as an `Array` object variable in `this` context.
this.docs = [
    
        type: '',
        piece: '',
        insti: '',
        desc: '',
        selected: '',
        date: ''
    
];

// Push an object into the declared array.
// By now `this.docs` should contain 2 objects.
this.docs.push(
    type: this.docs.type,
    piece: this.docs.piece,
    insti: this.docs.insti,
    desc: this.docs.desc,
    selected: this.docs.selected,
    date: today
);

// Push `this.docs` `Array` object.
// If `this.loggedUser` exists and has `docs` property of type `Array` this should work.
this.loggedUser.docs.push(this.docs);

console.log(this.loggedUser)

【参考方案3】：

如果您想将用户和文档保留在一个对象中，您可以这样做（我已经用基本字符串简化了结束代码以表明它可以工作）。我创建了另一个名为 obj 的变量来将您的对象存储在某处。

var obj = 
	users : [
			id:'140255045',password:'72465091Be',email:'[e-mail]',tc:'1',dId:1,name:'Erkan',surname:'Çalışkan',docs:[],
			id:'1',password:'1',email:'[e-mail]',tc:'1',dId:1,name:'Erkan',surname:'Çalışkan',docs:[],
			id:'2',password:'2',email:'[e-mail]',tc:'1',dId:2,name:'Erkan',surname:'Çalışkan',docs:[],
			id:'3',password:'3',email:'[e-mail]',tc:'1',dId:2,name:'Erkan',surname:'Çalışkan',docs:[]
		  ],
	
	docs:	[	type : '',
				piece : '',
				insti : '',
				desc : '',
				selected : '',
				date : '']	

	

obj.docs.push(	type : 'test',
				piece : 'test',
				insti : 'test',
				desc : 'test',
				selected : 'test',
				date : 'test');
 
		
console.log(obj.docs);

您也可以使用同一对象中的函数来执行此操作

var obj = 
	users : [
			id:'140255045',password:'72465091Be',email:'[e-mail]',tc:'1',dId:1,name:'Erkan',surname:'Çalışkan',docs:[],
			id:'1',password:'1',email:'[e-mail]',tc:'1',dId:1,name:'Erkan',surname:'Çalışkan',docs:[],
			id:'2',password:'2',email:'[e-mail]',tc:'1',dId:2,name:'Erkan',surname:'Çalışkan',docs:[],
			id:'3',password:'3',email:'[e-mail]',tc:'1',dId:2,name:'Erkan',surname:'Çalışkan',docs:[]
		  ],
	
	docs:	[	type : '',
				piece : '',
				insti : '',
				desc : '',
				selected : '',
				date : ''],
	
	a: function () 
		this.docs.push(	type : 'test',
				piece : 'test',
				insti : 'test',
				desc : 'test',
				selected : this.docs[0].selected,
				date : this.docs[0].selected);
		
	

	

obj.a();
 
		
console.log(obj.docs);		

请记住，当引用 this.docs 时，它会返回一个数组，因此您需要确保在其中放入索引以引用该数组中的特定对象（正如我在本文中所做的那样最后几个值的代码）。