Weird Cache Behaviour

[atomic mountain]

I have 2 json files, /data/contentDownloads.json and /data/links.json

This is my helper to get the json files

import { unstable_cache } from "next/cache";
export async function getJson(
  fileName: string,
  tag?: string,
  revalidate?: number
) {
  const content = unstable_cache(
    async () => {
      const file = await fs.readFile(
        process.cwd() + `/data${fileName}.json`,
        "utf8"
      );
      const locContent = JSON.parse(file);
      return locContent;
    },
    ["json"],
    {
      tags: tag ? [tag] : ["data"],
      revalidate: revalidate ? revalidate : false,
    }
  )();
  return content;
}

I need the tags so I can revalidate them. Now if I call the function with /contentDownloads, "content" I get the correct data and can also revalidate correctly, but doing "links", "link" provides the same data as the content one, any idea why this seems to be happening?

[coral vine]

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[tawdry python]

you need to put fileName in the second parameter of unstablecache since its a closure

so "content" and "link" uses the same cache since the stringified version of the async function is the same

either put fileName in the second parameter, or pass it as an argument again into the inner function

[atomic mountain]

So the cache key has to have the filename?

I thought that param didn't matter lol