Zod to Mongoose schema converter

This package provides a function to convert zod object to mongoose schema.

[!NOTE] This package is in early development stage. Please report any issues you find and please expect API to change in minor versions.

Installation

npm i @zodyac/zod-mongoose

pnpm add @zodyac/zod-mongoose

yarn add @zodyac/zod-mongoose

bun add @zodyac/zod-mongoose

Breaking changes

Warning

If you were using zId, zUUID, z.objectId(), z.mongoUUID() before, please replace those with zId() and zUUID().

• zId is now zId(ref?)
• zUUID is now zUUID()

Usage

First, extend Zod with extendZod, then create your zod schema:

import { z } from "zod";
import { extendZod } from "@zodyac/zod-mongoose";

extendZod(z);

const zUser = z.object({
  name: z.string().min(3).max(255),
  age: z.number().min(18).max(100),
  active: z.boolean().default(false),
  access: z.enum(["admin", "user"]).default("user"),
  companyId: zId("Company"),
  wearable: zUUID(),
  address: z.object({
    street: z.string(),
    city: z.string(),
    state: z.enum(["CA", "NY", "TX"]),
  }),
  tags: z.array(z.string()),
  createdAt: z.date(),
  updatedAt: z.date(),
});

Then, convert it to mongoose schema and connect model:

import { zodSchema } from "@zodyac/zod-mongoose";
import { model } from "mongoose";

const schema = zodSchema(zDoc);
const userModel = model("User", schema);

That's it! Now you can use your mongoose model as usual:

userModel.find({ name: "John" });

[Note] extendZod should be called once for the whole application.

Features

Full support list can be found in SUPPORTED.md:

• ✅ Basic types

• ✅ Nested objects and schemas

• ✅ Arrays

• ✅ Enums (strings only)

• ✅ Default values

• ✅ Maps

• ✅ Dates

• ✅ ObjectId

• ✅ ObjectId references

• ✅ ZodAny as SchemaTypes.Mixed

• ✅ Validation using refinement for String, Number, Date

• ✅ Unique for String, Number, Date, ObjectId and UUID

• ⚠️ Record (Being converted to Map)

• ⚠️ Unions (Not supported by mongoose, will pick first inner type)

• ❗️ Intersection (not supported by mongoose)

• ❗️ Set (not supported by mongoose)

• ❗️ Indexes (not supported by zod)

• ⏳ Regex validation (coming soon)

• ⏳ instanceOf (coming soon)

Checking schemas

To make sure nothing is missing, you can use Schema.obj:

// schema is mongoose schema
console.log(schema.obj);

Raw object

If you want to get raw object from zod schema to modify it, you can use zodSchemaRaw function:

import { extendZod, zodSchemaRaw } from "@zodyac/zod-mongoose";
import { model, Schema } from "mongoose";

extendZod(z);

const schema = zodSchemaRaw(zDoc);
schema.age.index = true;

const model = model(
  "User",
  new Schema(schema, {
    timestamps: true,
  }),
);

ObjectID and UUID

You can use zId(ref?: string) and zUUID() to describe fields as ObjectID and UUID and add reference to another collection:

import { extendZod } from "@zodyac/zod-mongoose";
import { z } from "zod";

extendZod(z);

const zUser = z.object({
  someId: zId(),
  companyId: zId("Company"),
  facilityId: zId().ref("Facility"),
  wearable: zUUID(),
});

Validation

You can use zod refinement to validate your mongoose models:

import { z } from "zod";
import { extendZod, zodSchema } from "@zodyac/zod-mongoose";

extendZod(z);

const zUser = z.object({
  phone: z.string().refine(
    (v) => v.match(/^\d{3}-\d{3}-\d{4}$/),
    "Invalid phone number",
  ),
});

Unique fields

To make a String, Number or Date unique, call .unique():

import { z } from "zod";
import { extendZod, zodSchema } from "@zodyac/zod-mongoose";

extendZod(z);

const zUser = z.object({
  phone: z.string().unique(),
});

//

Warnings

ZodUnion types

Union types are not supported by mongoose. If you have a union type in your zod schema, it will be converted to it's inner type by default.

const zUser = z.object({
  access: z.union([z.string(), z.number()]),
});

// Will become
// {
//   access: {
//     type: String,
//   },
// }

ZodAny

ZodAny is converted to SchemaTypes.Mixed. It's not recommended to use it, but it's there if you need it.

ZodRecord

ZodRecord is converted to Map type. It's not recommended to use it, but it's there if you need it.

Contributing

Feel free to open issues and pull requests! Here's a quick guide to get you started:

• Fork the repository
• Install linter and formatter for VSCode: Biome
• Install dependencies: npm i
• Make changes
• Run tests: npm test
• Run linter: npm run lint (fix with npm run lint:fix)
• Commit and push your changes
• Open a pull request

License

MIT