Next.js · Senior · Question 42 of 75

How do you make sure a `'use cache'` function doesn't cache different users' data together?

✓Correct answer: Pass the user ID as an argument: it becomes part of the key
2Call cookies() inside the function to get the id
3Use one global key and clear the cache manually

Explanation

The cache key is built from arguments and captured values, so getDashboard(userId) creates separate entries. Reading cookies() inside a cached function is forbidden. Note that personal data in a shared server cache is a reason to consider 'use cache: private'.

How do you make sure a `'use cache'` function doesn't cache different users' data together?

Explanation

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How do you make sure a 'use cache' function doesn't cache different users' data together?

Explanation

Further reading

Test yourself

How do you make sure a `'use cache'` function doesn't cache different users' data together?