Undefined when running datastore.get for non existing datastore item

[SaschaHeyer]

Hi Sébastien,

when running the following

    const kind = "Paths";
    const key = datastore.key([kind, parseInt(req.params.id)]);

    const [path] = await datastore.get(key);
    console.log(path)

I get this error

Error: "undefined" is not a cacheable value
    at /Users/sascha/Documents/GitHub/obfuscated/node_modules/cache-manager-redis-store/dist/index.js:88:23
    at new Promise (<anonymous>)
    at Object.mset (/Users/sascha/Documents/GitHub/obfuscated/node_modules/cache-manager-redis-store/dist/index.js:51:14)
    at NsqlCache.primeCache (/Users/sascha/Documents/GitHub/obfuscated/node_modules/nsql-cache/lib/index.js:137:14)
    at /Users/sascha/Documents/GitHub/obfuscated/node_modules/nsql-cache/lib/keys.js:104:34
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
    at async exports.getPath (/Users/sascha/Documents/GitHub/obfuscated/Controllers/PathsController.js:77:20)
Error: "undefined" is not a cacheable value
    at /Users/sascha/Documents/GitHub/obfuscated/node_modules/cache-manager-redis-store/dist/index.js:88:23
    at new Promise (<anonymous>)
    at Object.mset (/Users/sascha/Documents/GitHub/obfuscated/node_modules/cache-manager-redis-store/dist/index.js:51:14)
    at NsqlCache.primeCache (/Users/sascha/Documents/GitHub/obfuscated/node_modules/nsql-cache/lib/index.js:137:14)
    at /Users/sascha/Documents/GitHub/obfuscated/node_modules/nsql-cache/lib/keys.js:104:34
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
    at async exports.getPath (/Users/sascha/Documents/GitHub/obfuscated/Controllers/PathsController.js:77:20)

I would expect an undefined just like datastore does it by default.

This is the datastore wrapper

const redisStore = require("cache-manager-redis-store");
const { Datastore } = require("@google-cloud/datastore");
const NsqlCache = require("nsql-cache");
const dsAdapter = require("nsql-cache-datastore");


const datastore = new Datastore();
const cache = new NsqlCache({
    db: dsAdapter(datastore),
    stores: [{
      store: redisStore,
      host: process.env.REDIS_HOST,
      port: process.env.REDIS_HOST
    }],
});
module.exports = { datastore, cache };

Best regards
Sascha