[英]Argument of type X is not assignable to parameter of type Y (although there's inheritance)
我正在尝试找出以下代码无法编译的确切原因:
type IEntityName = 'model1' | 'model2' | 'model3'
class Model {
id: string
constructor(id: string) {
this.id = id
}
}
class ModelChild1 extends Model { }
class ModelChild2 extends Model { }
class ModelChild3 extends Model { }
const MAP = {
model1: ModelChild1,
model2: ModelChild2,
model3: ModelChild3
}
function getModel(entityName: IEntityName) {
return MAP[entityName]
}
function doSomethingElse<T extends Model>(model: new () => T) {
}
function doSomething(entityName: IEntityName) {
const model = getModel(entityName)
doSomethingElse(model)
}
doSomething('model2')
我不明白这个问题,更重要的是,我不明白如何解决它。
您缺少构造函数参数类型,它应该是:
new (id: string) => T
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