我有一个在 IOS 模拟器中运行的本机应用程序。在初始化期间,它读取 Parse 数据库并使用以下 reducer 填充 redux 数据存储:
export default function items( state = [], action ) {
switch (action.type) {
case types.ADD_ASSIGNMENT:
return [
...state,
{
assignmentId: action.assignmentId,
shopperId: action.shopperId,
itemId: action.itemId,
createdAt: action.createdAt
}
];
case LOGOUT_SUCCESS:
return [];
default:
return state;
}
}
当我重复运行该应用程序时,它大约有 3 次失败,并出现以下 redux-logger 错误:
action ADD_ASSIGNMENT @ 19:02:09.732
prev state Object {router: Object, auth: Object, device: Object, global: Object, profile: Record…}
action Object {type: "ADD_ASSIGNMENT", assignmentId: "oNncJdVT16", shopperId: "aoieAPH6ll", itemId: "gza3038iPN", createdAt: Tue Feb 09 2016 11:43:48 GMT-0500 (EST)}
error TypeError: Cannot read property 'itemId' of null(…)
next state Object {router: Object, auth: Object, device: Object, global: Object, profile: Record…}
assignments: Array[1]
0: Object
assignmentId: "oNncJdVT16"
createdAt: Tue Feb 09 2016 11:43:48 GMT-0500 (EST)
itemId: "gza3038iPN"
shopperId: "aoieAPH6ll"
请注意错误如何指出 itemId 为空,但该操作实际上包含非空 itemId。下一个状态似乎是正确的,但应用程序在遇到此错误后无法恢复(不幸的是,它不会抛出带有附加信息的红屏)。
我还捕获了相同的 redux-logger 事件,显示相同的操作而没有任何错误:
action ADD_ASSIGNMENT @ 19:01:50.601
prev state Object {router: Object, auth: Object, device: Object, global: Object, profile: Record…}
action Object {type: "ADD_ASSIGNMENT", assignmentId: "oNncJdVT16", shopperId: "aoieAPH6ll", itemId: "gza3038iPN", createdAt: Tue Feb 09 2016 11:43:48 GMT-0500 (EST)}
next state Object {router: Object, auth: Object, device: Object, global: Object, profile: Record…}
assignments: Array[1]
0: Object
assignmentId: "oNncJdVT16"
createdAt: Tue Feb 09 2016 11:43:48 GMT-0500 (EST)
itemId: "gza3038iPN"
shopperId: "aoieAPH6ll"
关于如何处理的任何建议?