Created
July 21, 2024 17:11
-
-
Save mstaicu/55b94728cdc9590c88f718bd7122770e to your computer and use it in GitHub Desktop.
Mongoose Redis cache functional mixin
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| /** | |
| * Usage: | |
| * | |
| import mongoose from "mongoose"; | |
| import cacheMixin from "./cacheMixin.js"; | |
| withRedisCache(redis, mongoose.Query.prototype); | |
| After that, any model can call .cache({ key: userId }); to enable caching | |
| */ | |
| function withRedisCache(client, o) { | |
| function cache(options = {}) { | |
| this.useCache = true; | |
| /** | |
| * Make sure the key is always a string | |
| */ | |
| this.hashKey = JSON.stringify(options.key || ""); | |
| /** | |
| * Return this for further method chaining | |
| */ | |
| return this; | |
| } | |
| var exec = o.exec; | |
| async function patchedExec() { | |
| if (!this.useCache) { | |
| return await exec.apply(this, arguments); | |
| } | |
| var key = JSON.stringify( | |
| Object.assign({}, this.getQuery(), { | |
| collection: this.mongooseCollection.name, | |
| }) | |
| ); | |
| var cached = await client.hget(this.hashKey, key); | |
| if (cached) { | |
| var cachedDoc = JSON.parse(cached); | |
| return Array.isArray(cachedDoc) | |
| ? cachedDoc.map((doc) => new this.model(doc)) | |
| : new this.model(cachedDoc); | |
| } | |
| var result = await exec.apply(this, arguments); | |
| client.hset(this.hashKey, key, JSON.stringify(result)); | |
| return result; | |
| } | |
| return Object.assign(o, { | |
| cache, | |
| exec: patchedExec, | |
| }); | |
| } | |
| export { withRedisCache }; |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment