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

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

其他回答

我会使用以下结构:

interface arrayOfObjects extends Array<{}> {}

然后更容易定义:

let myArrayOfObjects: arrayOfObjects = [
  { 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"] },
];

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)。

额外的简单选项:

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

    type simpleType = simpleInt[];

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',
                }
            ]
        },

    ]

下面是一个适合你的例子的解决方案:

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

interface IenumServiceGetOrderBy extends Array<IenumServiceGetOrderByAttributes> {

}

let result: IenumServiceGetOrderBy;

有了这个解决方案,你可以使用数组的所有属性和方法(比如: 长度,push(), pop(), splice()…