具有一些已知和一些未知属性名称的对象的 Typescript 接口
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Typescript interface for objects with some known and some unknown property names
提问by yugantar kumar
I have an object where all the keys are string, some of the values are string and the rest are objects in this form:
我有一个对象，其中所有键都是字符串，一些值是字符串，其余是这种形式的对象：
var object = {
"fixedKey1": "something1",
"fixedKey2": "something2",
"unknownKey1": { 'param1': [1,2,3], 'param2': "some2", 'param3': 'some3'},
"unknownKey2": { 'param1': [1,2,3], 'param2': "some2", 'param3': 'some3'},
"unknownKey3": { 'param1': [1,2,3], 'param2': "some2", 'param3': 'some3'},
...
...
};
In this object fixedKey1and fixedKey2are the known keys which will be there in that object. unknownKey- value pair can vary from 1-n.
在这个对象中fixedKey1和fixedKey2是该对象中将存在的已知键。unknownKey- 值对可以在 1-n 之间变化。
I tried defining the interface of the object as:
我尝试将对象的接口定义为：
interface IfcObject {
[keys: string]: {
param1: number[];
param2: string;
param3: string;
}
}
But this throws the following error:
但这会引发以下错误：
Variable of type number is not assignable of type object
类型编号的变量不可分配给类型对象
Which I found out that it is not able to assign this interface to "fixedKey - value" pair.
我发现它无法将此接口分配给“fixedKey - value”对。
So, how can I do the type checking of this kind of variables?
那么，如何对此类变量进行类型检查呢？
采纳答案by Paleo
It's not exactly what you want, but you can use an union type:
这不完全是您想要的，但您可以使用联合类型：
interface IfcObject {
[key: string]: string | {
param1: number[];
param2: string;
param3: string;
}
}
回答by bersling
回答by Ajay
As @Paleo explained you can use union property to define an interface for your corresponding object.
正如@Paleo 所解释的，您可以使用 union 属性为相应的对象定义接口。
I would say you should define an interface for object values and then you should define your original object.
我会说你应该为对象值定义一个接口，然后你应该定义你的原始对象。
sample Interface can be
示例界面可以是
export interface IfcObjectValues {
param1: number[];
param2: string;
param3: string;
}
export interface IfcMainObject {
[key : string]: string | IfcObjectValues;
}
