How to fix 'The requested value cannot be determined'
When you encounter the prompt "The requested value cannot be determined", it is usually caused by missing data, failed logical judgment or wrong configuration. The solution is as follows: 1. Check whether the input parameters are complete, ensure that the required fields have values, and verify that the format is correct; 2. Check whether there is ambiguity in the logic judgment, add default branches, add logs, and use debugging tools to troubleshoot complex conditions; 3. Confirm the reliability of the data source, add empty judgment logic, set default values, and optimize query structure. Combining the context, gradually backtracking the data flow and logical processes can locate the root cause of the problem.
Have you ever encountered a prompt like " The requested value cannot be determined " popped up when using a software, website or API? Although this problem seems vague, it is actually caused by missing data, failed logical judgments or misconfiguration. Below are some common troubleshooting and solutions.

Check whether the input parameters are complete
Many systems need to rely on certain key parameters to make judgments when processing requests. If these parameters are missing or empty, the return value may not be determined.
- Common situations : For example, a query interface requires
user_id
, but it is not passed when called. - Suggested practices :
- Make sure all required fields have values
- If the data is transmitted from the front end to the back end, check the form to verify that it is too loose
- For API calls, you can first use Postman or curl to test whether the parameters are complete.
Sometimes the problem is not that the parameters do not exist, but that the format is incorrect. For example, the string is written as a number, which may also cause the system to be unrecognized.

Check whether there is any ambiguity in logic
This error also often occurs in program logic judgment, especially in places where there are many conditional branches. For example:
if x > 10: ... elif x < 5: ...
If x is equal to 7, then neither condition is satisfied, an error similar to "unjudgmentable" may be triggered.

- Suggested practices :
- Add a default branch to the logic (such as else)
- Increase log output to view the actual value of the current variable
- Use debugging tools to execute step by step and observe the process direction
Especially when multiple conditions are nested, unexpected situations are prone to occur, so try to avoid overly complex judgment logic in the code.
Is the data source reliable or has a null value?
If your application relies on a database, cache, or other external data source, and some fields are empty or are not returned correctly, it will also cause the system to fail to make a judgment.
- Common phenomena :
- The query result is empty but no fault-tolerant processing is done
- The interface returns null instead of the default value
- Solution :
- Add empty logic after getting data
- Set reasonable default values, such as using
.get("key", default_value)
instead of direct value - If it is a database query, consider adding indexes or optimizing statement structure
Sometimes, this problem only occurs in specific scenarios, such as different user permissions and different device types, so you should also pay attention to multi-scenario testing.
Basically that's it. This problem itself is not a specific error code, but more like a general prompt, so the key is to analyze in which link is in detail. As long as you go back to the data flow and logical judgment step by step, you can usually find the reason.
The above is the detailed content of How to fix 'The requested value cannot be determined'. For more information, please follow other related articles on the PHP Chinese website!

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