kv-utils

Collection of utilities for working with Deno KV.

multiSet

Set multiple key/value pairs into KV. The key/value pairs are grouped together into transactions for higher performance over setting individually as this reduces network traversal. For large sets of data this is up to 400x faster than setting keys individually.

import {
  MultiResult,
  multiSet,
} from "https://deno.land/x/[email protected]/mod.ts";

const keyValues = new Map<Deno.KvKey, unknown>();
for (let i = 0; i < 100; i++) {
  keyValues.set(["key", i], `value-${i}`);
}
const result: MultiResult = await multiSet(keyValues);

if (!result.ok) {
  const failedToInsertKeys = result.failedKeys;
  // ....
}

multiDelete

Delete multiple key/value pairs from KV. Deletes are grouped together into transactions for higher performance over deleting individually as this reduces network traversal. For large sets of data this is up to 400x faster than deleting keys individually.

Delete from an array of keys:

import { multiDelete } from "https://deno.land/x/[email protected]/mod.ts";

const keys: Deno.KvKey[] = [];
for (let i = 0; i < 100; i++) {
  keys.push(["key", i]);
}
const result = await multiDelete(keys);

if (!result.ok) {
  const failedToDeleteKeys = result.failedKeys;
  // ....
}

Or delete all matches from a list selector

import { multiDelete } from "https://deno.land/x/[email protected]/mod.ts";

const result = await multiDelete({ prefix: ["key"], end: ["key", 7] });

if (!result.ok) {
  const failedToDeleteKeys = result.failedKeys;
  // ....
}

replaceLocalDataWithRemote

This utility will either:

1. Delete all local KV data, and replace it with all data at a remote KV instance
2. Delete all local KV data matching any prefix passed in (preserving any data which does not match), and inserting any remote KV data which matches any prefix passed in.

Replace all local data with remote data:

import { replaceLocalDataWithRemote } from "https://deno.land/x/[email protected]/mod.ts";

const kvUUID = "910c3c46-e7b9-4339-a4ff-41da05ae7f30"; //Replace with your own KV UUID
const remoteKvUrl = `https://api.deno.com/databases/${kvUUID}/connect`;
const result = await replaceLocalDataWithRemote(remoteKvUrl);

if (!result.ok) {
  const failedKeys = result.failedKeys;
  // ...
}

This code will delete all user and session data on the local KV and replace with the remote user and session data. Other data is unaffected:

import { replaceLocalDataWithRemote } from "https://deno.land/x/[email protected]/mod.ts";

const kvUUID = "910c3c46-e7b9-4339-a4ff-41da05ae7f30"; //Replace with your own KV UUID
const remoteKvUrl = `https://api.deno.com/databases/${kvUUID}/connect`;
const result = await replaceLocalDataWithRemote(remoteKvUrl, [{
  prefix: ["user"],
}, { prefix: ["session"] }]);

if (!result.ok) {
  const failedKeys = result.failedKeys;
  // ...
}

wipeKvStore

A shorthand, explicit, way to clear your KV store of all data.

Warning: This will remove all data from your KV store. There is no recovery.

import { wipeKvStore } from "https://deno.land/x/[email protected]/mod.ts";

const result = await wipeKvStore();

if (!result.ok) {
  const keysWhichWereNotDeleted = result.failedKeys;
  // ....
}

count

For a given list selector, count the number of matching keys. Note, this works by fetching all the data and then counting it, which is very inefficient. This is useful in test scenarios, but in production code you should keep track of row counts in a separate key entry which gets atomically incremented/decremented in a transaction alongside any set or delete operations.

See also this issue which proposes a native count function in KV.

import { count } from "https://deno.land/x/[email protected]/mod.ts";

const keyCount = await count({ prefix: ["key"] });

countAll

A shorthand function to count all keys in KV. Note, this works by fetching all the data and then counting it, which is very inefficient. This is useful in test scenarios, but in production code you should keep track of row counts in a separate key entry which gets atomically incremented/decremented in a transaction alongside any set or delete operations.

import { countAll } from "https://deno.land/x/[email protected]/mod.ts";

const numOfKeys = await countAll();