typescript “void”类型的参数不能分配给“Action”类型的参数
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Argument of type 'void' is not assignable to parameter of type 'Action'
提问by Khushi
i'am new to Typescript and using VSCode.
我是 Typescript 的新手并使用 VSCode。
Getting following Error:
得到以下错误：
*[ts] Argument of type 'void' is not assignable to parameter of type 'Action'. (parameter) action: void
*[ts]“void”类型的参数不能分配给“Action”类型的参数。（参数）动作：void
Code:
代码：
loadItems() {
return this.Apiname.find()
.map(
(data) => console.log("data:", data)
)
.map(
payload => ({
type: 'LOAD_ITEMS',
payload: payload
},
)
)
.subscribe(
action => this._store.dispatch(action)//Error
);
};
Any help will be very helpfull.
任何帮助都会非常有帮助。
采纳答案by Radim K?hler
Your mapstatement contains trailing ,, which could be the problem. I'd adjust the code like that:
您的map语句包含 trailing ,，这可能是问题所在。我会像这样调整代码：
return this.Apiname.find()
.do( (data) => console.log("data:", data) )
.map(
payload => ({
type: 'LOAD_ITEMS',
payload: payload
//},)
})
)
.subscribe(
action => this._store.dispatch(action) // no error
);
now actionis of type { type: string, payload: ... }
现在action是类型{ type: string, payload: ... }
NOTE: for side effects, like printing with console.log, ReactiveX provides .dooperator - see http://reactivex.io/documentation/operators/do.html
注意：对于副作用，比如用 打印console.log，ReactiveX 提供 .do操作符 - 请参阅http://reactivex.io/documentation/operators/do.html
