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cachingnestjs

Nestjs cache-manager set

Does the Nestjs cache-manager set command replace or append the given values to the key if the key already exists ? The documentation is not very clear on this

Solution

  • If the key already exists, cache-maanger replace that key. It does not append a new value.

    That's true I've not read any docs that explicitly says .set override previous data, but you can take a look to the package tests.

    I've downloaded repository and I've created a new test like this:

    it('should override key', async () => {
  cache = await caching(async (arg?: MemoryConfig) => memoryStore(arg));
  await cache.set(key, value);
  await sleep(20);
  await expect(cache.get(key)).resolves.toEqual(value);
  const newValue = 'newValue'
  await cache.set(key, newValue);
  await sleep(20)
  await expect(cache.get(key)).resolves.toEqual(newValue);
})

    I've overwritten the key and the result is the new one, is not appended.