CD
Cloudflare Developers•2mo ago
Hth4nh

Hello everyone,

Hello everyone, I'm encountering an issue with the Cloudflare Worker KV where I get an empty array when trying to retrieve multiple keys at once. When I run the following code, it returns an empty array: 
const values = await options.env.TEST.get(["2930", "2929"]);
console.log([...values.entries()]); // []

// Expected: [["2930", "foo"],["2929","bar"]]
const values = await options.env.TEST.get(["2930", "2929"]);
console.log([...values.entries()]); // []

// Expected: [["2930", "foo"],["2929","bar"]]
However, this alternative approach works as expected: 
const values = await Promise.all(["2930", "2929"].map((key) => options.env.TEST.get(key)));
console.log(values); // ["foo", "bar"]
const values = await Promise.all(["2930", "2929"].map((key) => options.env.TEST.get(key)));
console.log(values); // ["foo", "bar"]
According to the documentation, passing an array of keys to the get() method should return a Map of the key-value pairs. Here is my wrangler.jsonc file for reference: 
{
    "$schema": "node_modules/wrangler/config-schema.json",
    "name": "***",
    "main": "./src/index.ts",
    "compatibility_date": "2025-06-20",
    "observability": {
        "enabled": true
    },
    "assets": {
        "directory": "./public/",
        "binding": "ASSETS"
    },
    "kv_namespaces": [
        {
            "binding": "TEST",
            "id": "***",
            "preview_id": "***"
        }
    ]
}
{
    "$schema": "node_modules/wrangler/config-schema.json",
    "name": "***",
    "main": "./src/index.ts",
    "compatibility_date": "2025-06-20",
    "observability": {
        "enabled": true
    },
    "assets": {
        "directory": "./public/",
        "binding": "ASSETS"
    },
    "kv_namespaces": [
        {
            "binding": "TEST",
            "id": "***",
            "preview_id": "***"
        }
    ]
}
I've also made sure that the preview_id is correctly configured for use with wrangler dev. Has anyone else experienced this issue or has any idea what might be going wrong? Thanks
2 Replies
thomasgauvin
thomasgauvin•2mo ago
.entries() is a command on Object but the return value of .get(keys) is a Map this code works: export default { async fetch(request, env, ctx) { // write a key-value pair await env.KV.put('KEY', 'VALUE'); await env.KV.put('KEY2', 'VALUE2'); const value1 = await env.KV.get('KEY'); const value2 = await env.KV.get('KEY2'); const values = await env.KV.get(['KEY', 'KEY2']) // return a Workers response return new Response( JSON.stringify({ values: Object.fromEntries(values), value1: value1, value2: value2 }), ); } }
Hth4nh
Hth4nhOP•5w ago
I know why my code is broken As you can see in my code, I used numeric keys ("2929", "2930") If I try to add a non-numeric character to the key, the code works fine Code: 
app.get("/test_kv", async (c) => {
    await Promise.all([c.env.KV.put("2929", "VALUE"), c.env.KV.put("2930", "VALUE2")]);

    const value1 = await c.env.KV.get("2929");
    const value2 = await c.env.KV.get("2930");
    const values = await c.env.KV.get(["2929", "2930"]);

    await Promise.all([c.env.KV.put("2929zzz", "VALUEzzz"), c.env.KV.put("2930zzz", "VALUE2zzz")]);

    const value1zzz = await c.env.KV.get("2929zzz");
    const value2zzz = await c.env.KV.get("2930zzz");
    const valueszzz = await c.env.KV.get(["2929zzz", "2930zzz"]);

    return new Response(
        JSON.stringify(
            {
                values: Object.fromEntries(values),
                value1: value1,
                value2: value2,
                valueszzz: Object.fromEntries(valueszzz),
                value1zzz: value1zzz,
                value2zzz: value2zzz,
            },
            null,
            2,
        ),
    );
});
app.get("/test_kv", async (c) => {
    await Promise.all([c.env.KV.put("2929", "VALUE"), c.env.KV.put("2930", "VALUE2")]);

    const value1 = await c.env.KV.get("2929");
    const value2 = await c.env.KV.get("2930");
    const values = await c.env.KV.get(["2929", "2930"]);

    await Promise.all([c.env.KV.put("2929zzz", "VALUEzzz"), c.env.KV.put("2930zzz", "VALUE2zzz")]);

    const value1zzz = await c.env.KV.get("2929zzz");
    const value2zzz = await c.env.KV.get("2930zzz");
    const valueszzz = await c.env.KV.get(["2929zzz", "2930zzz"]);

    return new Response(
        JSON.stringify(
            {
                values: Object.fromEntries(values),
                value1: value1,
                value2: value2,
                valueszzz: Object.fromEntries(valueszzz),
                value1zzz: value1zzz,
                value2zzz: value2zzz,
            },
            null,
            2,
        ),
    );
});
Result: 
{
  "values": {},
  "value1": "VALUE",
  "value2": "VALUE2",
  "valueszzz": {
    "2929zzz": "VALUEzzz",
    "2930zzz": "VALUE2zzz"
  },
  "value1zzz": "VALUEzzz",
  "value2zzz": "VALUE2zzz"
}
{
  "values": {},
  "value1": "VALUE",
  "value2": "VALUE2",
  "valueszzz": {
    "2929zzz": "VALUEzzz",
    "2930zzz": "VALUE2zzz"
  },
  "value1zzz": "VALUEzzz",
  "value2zzz": "VALUE2zzz"
}
Although I can simply use the above method, I would like to ask if there is a way for me to use a numeric key?

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