uni-app TypeError: Cannot read properties of undefined (reading 'redisResponse')

uni-app TypeError: Cannot read properties of undefined (reading ‘redisResponse’)

操作步骤：

  • 在服务空间，redis模块多添加几次key

预期结果：

  • 正常

实际结果：

  • 报错

bug描述：

  • 在服务空间使用数据管理添加key，报这个错。然后点击业务管理，每个小模块都有这个错。这是偶发的，但是每天都能遇到，过一段时间就又能用了
2 回复

又出现了，点击redis的刷新按钮，接口返回 {
“errDetail”: “[env-00jxg9el284n][DCloud-clientDB][0a4b4baf17092593006406071221] Auth Forbidden Error, Please Check The Token/Sign Info: access info is not found: errorMessage:“auth has expired” errorCode:40003”,
“errCode”: “50005”,
“errMsg”: “函数不允许调用”
}

更多关于uni-app TypeError: Cannot read properties of undefined (reading 'redisResponse')的实战教程也可以访问 https://www.itying.com/category-93-b0.html


The error TypeError: Cannot read properties of undefined (reading 'redisResponse') in a uni-app project typically indicates that you’re trying to access a property (redisResponse) on an object that is undefined. This can happen for several reasons, such as:

  1. The object is not properly initialized: The object you’re trying to access might not have been created or assigned a value yet.

  2. Asynchronous code issue: If the code is asynchronous, the object might not be available at the time you’re trying to access it.

  3. Typo or incorrect variable name: You might be referencing the wrong variable or object.

Steps to Debug and Fix the Issue

1. Check Object Initialization

Ensure that the object you’re trying to access (redisResponse) is properly initialized before you try to access it.

let redisResponse = {}; // Initialize the object

// Now you can safely access redisResponse
console.log(redisResponse.someProperty);

2. Check Asynchronous Code

If the object is being populated asynchronously (e.g., after an API call), ensure that you’re accessing it only after the asynchronous operation has completed.

async function fetchData() {
    let redisResponse = await someAsyncFunction(); // Wait for the async function to complete
    console.log(redisResponse.someProperty); // Now it's safe to access
}

fetchData();

3. Verify Variable Names

Double-check that you’re using the correct variable name. A typo can easily lead to this kind of error.

let redisResponse = { someProperty: 'value' };

// Ensure you're using the correct variable name
console.log(redisResponse.someProperty); // Correct
console.log(redisResonse.someProperty);  // Typo, will cause an error

4. Add Error Handling

Add error handling to gracefully handle cases where the object might be undefined.

if (redisResponse) {
    console.log(redisResponse.someProperty);
} else {
    console.error('redisResponse is undefined');
}

5. Check the Stack Trace

Look at the stack trace provided by the error to identify exactly where the issue is occurring. This can help you pinpoint the line of code causing the problem.

6. Use Optional Chaining (if supported)

If your environment supports optional chaining (ES2020), you can use it to safely access nested properties.

console.log(redisResponse?.someProperty); // Will return undefined if redisResponse is undefined, instead of throwing an error

Example Scenario

Suppose you have the following code:

let redisResponse;

function getResponse() {
    return redisResponse;
}

let response = getResponse();
console.log(response.redisResponse); // This will throw the error

Fix:

let redisResponse = {}; // Initialize the object

function getResponse() {
    return redisResponse;
}

let response = getResponse();
if (response) {
    console.log(response.redisResponse); // Now it's safe to access
} else {
    console.error('response is undefined');
}
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