TypeError：无法解构“ undefined”或“ null”的属性“ req”

Question

我正在尝试使名为“ With Apollo Auth”的Next.js示例正常工作：https://github.com/zeit/next.js/tree/master/examples/with-apollo-auth

我已完成所有设置，但出现错误：

[INFO] Generating build script...
[INFO] Generating build script completed, took 321ms

[INFO] Creating build script snapshot......
[INFO] Creating build script snapshot... completed, took 10.4s

[INFO] Initializing inputs
[INFO] Building new asset graph...
[INFO] Building new asset graph completed, took 698ms

[INFO] Checking for unexpected pre-existing outputs....
[INFO] Checking for unexpected pre-existing outputs. completed, took 2ms

[INFO] Running build...
[SEVERE] json_serializable:json_serializable on lib/user.dart:

Invalid argument(s): Path must be absolute : dart:core
[SEVERE] json_serializable:json_serializable on lib/main.dart:

Invalid argument(s): Path must be absolute : dart:core
[SEVERE] json_serializable:json_serializable on test/widget_test.dart:

Invalid argument(s): Path must be absolute : dart:core
[INFO] Running build completed, took 1.5s

[INFO] Caching finalized dependency graph...
[INFO] Caching finalized dependency graph completed, took 36ms

[SEVERE] Failed after 1.6s

此错误来自下一页，这是Next.js提供的样板代码：

TypeError: Cannot destructure property `req` of 'undefined' or 'null'.

const { AppTree, ctx: { req, res }} = ctx <----- Error line

我不确定为什么未定义ctx。

Answer 1

您执行的销毁错误，请修复以下问题

const { AppTree, req, res } = ctx;