🔑 sanity-plugin-unique

A simple Sanity Studio v3 plugin that provides a reusable unique string field type.
It ensures fields like email, username, or any other string are globally unique across documents.

✨ Features

• ✅ Easy to use → Just set type: "unique:string".
• ✅ Automatically detects field name (no manual config needed).
• ✅ Skips validation if the field is optional/empty.
• ✅ Works across all documents of the same schema type.
• ✅ Clear error messages like: This [fieldName] is already taken.

📦 Installation

npm install sanity-plugin-unique
# or
yarn add sanity-plugin-unique
# or
pnpm add sanity-plugin-unique

🚀 Usage

1. Add the plugin in your sanity.config.ts:

   import { defineConfig } from "sanity";
   import { uniquePlugin } from "sanity-plugin-unique";
   
   export default defineConfig({
     name: "default",
     title: "My Sanity Project",
     plugins: [uniquePlugin()],
   });

2. Use in your schema

   // schema/user.ts
   import { defineType } from "sanity";
   
   export const user = defineType({
     name: "user",
     title: "User",
     type: "document",
     fields: [
       {
         name: "email",
         title: "Email",
         type: "unique:string",
       },
       {
         name: "username",
         title: "Username",
         type: "unique:string",
       },
     ],
   });

🤝 Contributing

Want to contribute to this project? Awesome! 🎉 Please read our Contributing Guide for details on how to get started, development setup, coding guidelines, and the release process.