如何使用 then() 将 Fetch 响应的 JSON 主体传递给 Throw Error()?
你误会了.考虑这个伪代码.这本质上是我想做的，但是这样写就行不通了.
You've misunderstood. Consider this psuedo code. This is essentially what I want to do but it doesn't work when wrote like that.
一旦你通过 Fetch 收到 Laravel 422 响应，response 就不包含实际的 JSON 数据.你必须使用 response =>response.json() 来访问它.我已经放了一张 response 持有的图片，并且在使用 response => 之后我还提供了输出.response.json().
Once you receive a Laravel 422 response with Fetch, the response doesn't contain the actual JSON data. You have to use response => response.json() to access it. I've put a picture of what the responseholds and I've also supplied the output after using response => response.json().
我不试图将对象转换为 JSON 字符串.
I am NOT trying to convert an object into a JSON string.
我在 Laravel 中使用 SweetAlert2.
I'm using SweetAlert2 with Laravel.
抛出错误(response => response.json())
swal({
title: 'Are you sure you want to add this resource?',
type: 'warning',
showCancelButton: true,
confirmButtonText: 'Submit',
showLoaderOnConfirm: true,
allowOutsideClick: () => !swal.isLoading(),
preConfirm: () => {
return fetch("/resource/add", {
method: "POST",
body: JSON.stringify(data),
credentials: "same-origin",
headers: new Headers({
'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content'),
'Content-Type': 'application/json',
'Accept': 'application/json'
})
})
.then(response => {
if (!response.ok) {
// How can I return the response => response.json() as an error?
// response.json() is undefined here when used
// throw Error( response => response.json() ); is what I want to do
throw Error(response.statusText);
}
return response;
})
.then(response => response.json())
.then(res => console.log('res is', res))
.catch(error => console.log('error is', error));
}
})
response 在 response => 之后包含以下内容response.json() 我想传递给 error() 的就是这个 JSON.
response holds the following after response => response.json() and it's this JSON that I want to pass to error().
{"message":"The given data was invalid.","errors":{"name":["The name field is required."],"abbrev":["The abbrev field is required."]}}
我进行了一个 AJAX 调用，如果 Laravel 的验证失败，它会返回一个 status 422，其中包含 JSON 中的验证错误消息.但是，Fetch 不会将 422 响应视为错误"，因此我必须自己使用 throw 手动触发它.
I make an AJAX call and if Laravel's validation fails, it returns a status 422 with the validation error messages in JSON. However, Fetch doesn't count 422 responses as an 'error' so I have to manually trigger it myself with throw.
因为我的验证消息在 JSON 响应中，即然后(response => json())如何将我的 response 转换为 json 然后将其传递给我的 throw error() ?
Because my validation messages are in the JSON response i.e.
then(response => json())
how can I convert my response to json and then pass it to my throw error() ?
仅供参考，这是 console.log(response) 在使用 response => 之前所持有的.response.json()
Just FYI, this is what console.log(response) holds before using response => response.json()
推荐答案
这样的东西应该可以工作:
Something like this should work:
fetch(...)
.then((response) => {
return response.json()
.then((json) => {
if (response.ok) {
return Promise.resolve(json)
}
return Promise.reject(json)
})
})
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