如何为对象数组定义接口?

我有以下界面和代码。我认为我做的定义是正确的，但我得到一个错误:

interface IenumServiceGetOrderBy { id: number; label: string; key: any }[];

and:

getOrderBy = (entity): IenumServiceGetOrderBy => {
        var result: IenumServiceGetOrderBy;
        switch (entity) {
            case "content":
                result =
                [
                    { id: 0, label: 'CId', key: 'contentId' },
                    { id: 1, label: 'Modified By', key: 'modifiedBy' },
                    { id: 2, label: 'Modified Date', key: 'modified' },
                    { id: 3, label: 'Status', key: 'contentStatusId' },
                    { id: 4, label: 'Status > Type', key: ['contentStatusId', 'contentTypeId'] },
                    { id: 5, label: 'Title', key: 'title' },
                    { id: 6, label: 'Type', key: 'contentTypeId' },
                    { id: 7, label: 'Type > Status', key: ['contentTypeId', 'contentStatusId'] }
                ];
                break;
        }
        return result;
    };

错误:

Error   190 Cannot convert '{}[]' to 'IenumServiceGetOrderBy':
    Type '{}[]' is missing property 'id' from type 'IenumServiceGetOrderBy'

当前回答

像这样使用!

interface Iinput {
  label: string
  placeholder: string
  register: any
  type?: string
  required: boolean
}


// This is how it can be done

const inputs: Array<Iinput> = [
  {
    label: "Title",
    placeholder: "Bought something",
    register: register,
    required: true,
  },
]

2020-09-27 06:44:55

其他回答

简单的选项，没有tslint错误…

export interface MyItem {
    id: number
    name: string
}

export type MyItemList = [MyItem]

2017-12-06 12:22:25

像这样使用!

interface Iinput {
  label: string
  placeholder: string
  register: any
  type?: string
  required: boolean
}


// This is how it can be done

const inputs: Array<Iinput> = [
  {
    label: "Title",
    placeholder: "Bought something",
    register: register,
    required: true,
  },
]

2020-09-27 06:44:55

你不需要使用索引器(因为它的类型不太安全)。你有两个选择:

interface EnumServiceItem {
    id: number; label: string; key: any
}

interface EnumServiceItems extends Array<EnumServiceItem>{}


// Option A 
var result: EnumServiceItem[] = [
    { id: 0, label: 'CId', key: 'contentId' },
    { id: 1, label: 'Modified By', key: 'modifiedBy' },
    { id: 2, label: 'Modified Date', key: 'modified' },
    { id: 3, label: 'Status', key: 'contentStatusId' },
    { id: 4, label: 'Status > Type', key: ['contentStatusId', 'contentTypeId'] },
    { id: 5, label: 'Title', key: 'title' },
    { id: 6, label: 'Type', key: 'contentTypeId' },
    { id: 7, label: 'Type > Status', key: ['contentTypeId', 'contentStatusId'] }
];

// Option B
var result: EnumServiceItems = [
    { id: 0, label: 'CId', key: 'contentId' },
    { id: 1, label: 'Modified By', key: 'modifiedBy' },
    { id: 2, label: 'Modified Date', key: 'modified' },
    { id: 3, label: 'Status', key: 'contentStatusId' },
    { id: 4, label: 'Status > Type', key: ['contentStatusId', 'contentTypeId'] },
    { id: 5, label: 'Title', key: 'title' },
    { id: 6, label: 'Type', key: 'contentTypeId' },
    { id: 7, label: 'Type > Status', key: ['contentTypeId', 'contentStatusId'] }
]

我个人推荐选项A(使用类而不是接口时更简单的迁移)。

2014-08-24 10:33:53

您可以通过简单地扩展接口将类型定义为对象数组。下面是一个例子:

// type of each item in the Service list
interface EnumServiceItem {
    id: string;
    label: string;
}

// type of the Service 
interface ServiceType {
    id: string,
    label: string,
    childList?: Array<EnumServiceItem>
}

// type of the Service list
type ServiceListType = Array<ServiceType>

let draggableList:ServiceListType =  [
        {
            id: "1",
            label: 'Parent Item 1',
            childList: [
                {
                    id: "11",
                    label: 'Child Item 1',
                },
                {
                    id: "12",
                    label: 'Child Item 2',
                }
                ,
                {
                    id: "13",
                    label: 'Child Item 3',
                }
            ]
        },
        {
            id: "2",
            label: 'Parent Item 2',
            childList: [
                {
                    id: "14",
                    label: 'Child Item 4',
                },
                {
                    id: "15",
                    label: 'Child Item 5',
                }
                ,
                {
                    id: "16",
                    label: 'Child Item 6',
                }
            ]
        },
        {
            id: "3",
            label: 'Parent Item 3',
            childList: [
                {
                    id: "17",
                    label: 'Child Item 7',
                },
                {
                    id: "18",
                    label: 'Child Item 8',
                }
                ,
                {
                    id: "19",
                    label: 'Child Item 9',
                }
            ]
        },

    ]

2022-04-17 13:32:12

所以我要补充我的意见:)

假设您需要一个充满person的Workplace类型。你需要这样的东西:

错了!．.．作为接口


interface Workplace {
   name: string
   age: number
}[] 
// that [] doesn't work!! ;)

这里的问题是接口是用于指定类/对象形状..仅此而已。所以你可以用type来代替，它更灵活

更好->使用类型而不是接口


type Workplace = {
   name: string
   age: number
}[] 

// This works :D

但也许最好的是……

将内部对象Person定义为interface，然后Workplace定义为Person数组生成的类型-> Person[]


interface Person {
   name: string
   age: number
}

type Workplace = Person[]

// nice ;)

祝你好运

2022-06-16 12:28:45

如何为对象数组定义接口?

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