### Start Development Server (Bash)

Source: https://nitro-graphql.pages.dev/guide/installation

Commands to start the development server for both Nitro and Nuxt projects using npm.

```bash
npm run dev
```

```bash
npm run dev
```

--------------------------------

### Example GraphQL Schema (GraphQL)

Source: https://nitro-graphql.pages.dev/guide/installation

Defines a basic GraphQL schema with a 'hello' query and a required empty mutation type. This serves as a starting point for your API.

```graphql
type Query {
  hello: String!
}

type Mutation {
  _empty: String
}
```

--------------------------------

### Example Resolver (TypeScript)

Source: https://nitro-graphql.pages.dev/guide/installation

Provides a simple resolver for the 'hello' query, returning a greeting message. This demonstrates how to define query resolvers.

```typescript
export const helloQuery = defineQuery({
  hello: () => 'Hello from Nitro GraphQL!',
})
```

--------------------------------

### Setup and Run Nitro GraphQL Locally

Source: https://nitro-graphql.pages.dev/contributing/adding-features

Commands to clone the repository, install dependencies using pnpm, and start the development server for Nitro GraphQL.

```bash
git clone https://github.com/YOUR_USERNAME/nitro-graphql.git
cd nitro-graphql
pnpm install
pnpm dev
```

--------------------------------

### Manually Run Federation Playground

Source: https://nitro-graphql.pages.dev/contributing/development-setup

Provides steps to manually set up and run the Federation playground. This involves navigating to the playground directory, installing its dependencies, and starting the development server.

```bash
cd playgrounds/federation
pnpm install
pnpm dev
```

--------------------------------

### Manually Run Nuxt Playground

Source: https://nitro-graphql.pages.dev/contributing/development-setup

Provides steps to manually set up and run the Nuxt playground. This involves navigating to the playground directory, installing its dependencies, and starting the development server.

```bash
cd playgrounds/nuxt
pnpm install
pnpm dev
```

--------------------------------

### Bash Commands for Running E-Commerce API

Source: https://nitro-graphql.pages.dev/examples/e-commerce-api

Provides essential bash commands for managing the e-commerce API project. Includes commands for installing dependencies, starting the development server, building for production, and previewing the production build. The GraphQL endpoint is accessible at http://localhost:3000/api/graphql.

```bash
# Install dependencies
pnpm install

# Development mode
pnpm dev

# Build for production
pnpm build

# Preview production
pnpm preview

Access the GraphQL endpoint at: `http://localhost:3000/api/graphql`
```

--------------------------------

### Install Lucia Auth Dependency (Bash)

Source: https://nitro-graphql.pages.dev/guide/installation

Installs the Lucia Auth library for authentication.

```bash
# Lucia Auth
pnpm add lucia
```

--------------------------------

### Create Nitro Project (Bash)

Source: https://nitro-graphql.pages.dev/guide/installation

This snippet shows how to create a new Nitro project using npx and giget, and then navigate into the project directory.

```bash
# Create a new Nitro project
npx giget@latest nitro my-nitro-app
cd my-nitro-app
```

--------------------------------

### Install and Run VitePress Docs Locally (pnpm)

Source: https://nitro-graphql.pages.dev/contributing/documentation

Commands to install dependencies and start the local development server for VitePress documentation using pnpm. Assumes the user is in the `.docs` directory.

```bash
cd .docs
pnpm install
cd .docs
pnpm dev
```

--------------------------------

### Install GraphQL Subscriptions Dependency (Bash)

Source: https://nitro-graphql.pages.dev/guide/installation

Installs the GraphQL Yoga library, which includes support for subscriptions.

```bash
# GraphQL Subscriptions (Yoga)
pnpm add graphql-yoga

# Already included with Yoga!
```

--------------------------------

### Install Nitro GraphQL and GraphQL Yoga

Source: https://nitro-graphql.pages.dev/guide/graphql-yoga

Installs the necessary packages for using GraphQL Yoga with Nitro GraphQL. This includes `nitro-graphql`, `graphql-yoga`, and `graphql`.

```bash
pnpm add nitro-graphql graphql-yoga graphql
```

--------------------------------

### Install Prisma Dependencies (Bash)

Source: https://nitro-graphql.pages.dev/guide/installation

Installs Prisma ORM and its CLI tool for database integration.

```bash
# Prisma
pnpm add prisma @prisma/client
pnpm add -D prisma
```

--------------------------------

### Create Nuxt Project (Bash)

Source: https://nitro-graphql.pages.dev/guide/installation

This snippet demonstrates how to initialize a new Nuxt project using npx nuxi and change the directory.

```bash
# Create a new Nuxt project
npx nuxi@latest init my-nuxt-app
cd my-nuxt-app
```

--------------------------------

### Install Nitro GraphQL Dependencies (Bash)

Source: https://nitro-graphql.pages.dev/guide/installation

Installs Nitro GraphQL and its associated framework dependencies. Supports GraphQL Yoga (recommended) and Apollo Server.

```bash
pnpm add nitro-graphql graphql-yoga graphql
```

```bash
pnpm add nitro-graphql @apollo/server @apollo/utils.withrequired @as-integrations/h3 graphql
```

--------------------------------

### Install Dependencies (Bash)

Source: https://nitro-graphql.pages.dev/guide/quick-start-nuxt

Installs the necessary packages for Nitro GraphQL, graphql-yoga, and graphql in a Nuxt project. Supports pnpm, npm, and yarn package managers.

```bash
pnpm add nitro-graphql graphql-yoga graphql
```

```bash
npm install nitro-graphql graphql-yoga graphql
```

```bash
yarn add nitro-graphql graphql-yoga graphql
```

--------------------------------

### Test GraphQL API Query (GraphQL)

Source: https://nitro-graphql.pages.dev/guide/installation

A sample GraphQL query to test the 'hello' field. This query should be run against the `/api/graphql` endpoint.

```graphql
query {
  hello
}
```

--------------------------------

### Install JWT Dependencies (Bash)

Source: https://nitro-graphql.pages.dev/guide/installation

Installs the jsonwebtoken library and its type definitions for JWT-based authentication.

```bash
# JWT
pnpm add jsonwebtoken
pnpm add -D @types/jsonwebtoken
```

--------------------------------

### Example Page Markdown Structure

Source: https://nitro-graphql.pages.dev/contributing/documentation

A markdown template for 'Example' pages, showcasing complete implementations of concepts. Includes sections for overview, features, project structure, setup, implementation details (configuration, schema, resolvers), key concepts, and instructions to try it out.

```markdown
# Example: Project Name

Complete working example of [concept].

## Overview

What this example demonstrates.

## Features

- Feature 1
- Feature 2
- Feature 3

## Project Structure

```
project/
├── server/
│   └── graphql/
├── app/
└── nitro.config.ts
```

## Setup

```bash
# Clone and setup
git clone https://github.com/example/repo
cd repo
pnpm install
pnpm dev
```

## Implementation

### Configuration

```typescript
// nitro.config.ts
```

### Schema

```graphql
# schema.graphql
```

### Resolvers

```typescript
// resolvers.ts
```

## Key Concepts

Explain important patterns used.

## Try It Out

1. Start the server
2. Open GraphQL playground
3. Run example queries

## Source Code

[View on GitHub](https://github.com/example/repo)
```

--------------------------------

### Install VS Code GraphQL Extension (Bash)

Source: https://nitro-graphql.pages.dev/guide/installation

Installs the official GraphQL extension for VS Code, providing syntax highlighting and autocomplete for GraphQL files.

```bash
code --install-extension GraphQL.vscode-graphql
```

--------------------------------

### Example Bash Script

Source: https://nitro-graphql.pages.dev/contributing/documentation

A simple bash script example, likely for setup or command execution within a recipe or example page. It's a placeholder for actual commands.

```bash
# Commands
```

--------------------------------

### Main Nitro Module Setup

Source: https://nitro-graphql.pages.dev/contributing/architecture

The core Nitro module setup function orchestrates the module's main tasks, including file watching, code generation, and route registration. It serves as the entry point for the Nitro GraphQL module.

```typescript
import { defineNitroModule } from 'nitropack'

export default defineNitroModule({
  setup(nitro, options) {
    // 1. Setup file watching
    // 2. Scan and discover files
    // 3. Generate types
    // 4. Register routes
    // 5. Handle Nuxt integration
  }
})
```

--------------------------------

### Install Apollo Federation Dependency (Bash)

Source: https://nitro-graphql.pages.dev/guide/installation

Installs the @apollo/subgraph package for implementing Apollo Federation.

```bash
# Apollo Federation
pnpm add @apollo/subgraph
```

--------------------------------

### Install Apollo Federation Dependencies

Source: https://nitro-graphql.pages.dev/guide/apollo-federation

Installs the necessary Apollo Server, Subgraph, and utility packages using pnpm. These are essential for enabling federation capabilities.

```bash
pnpm add @apollo/server @apollo/subgraph @apollo/utils.withrequired @as-integrations/h3 graphql
```

--------------------------------

### Example TypeScript Resolver with Auto-generated Types (TypeScript)

Source: https://nitro-graphql.pages.dev/guide/installation

Demonstrates how to import and use auto-generated server-side TypeScript types (like 'User') within a resolver function for type safety.

```typescript
import type { User } from '#graphql/server'

export const userQueries = defineQuery({
  user: async (_, { id }): Promise<User | null> => {
    // Fully typed!
    return await db.user.findUnique({ where: { id } })
  },
})
```

--------------------------------

### Install Mongoose Dependency (Bash)

Source: https://nitro-graphql.pages.dev/guide/installation

Installs Mongoose ODM for MongoDB integration.

```bash
# Mongoose
pnpm add mongoose
```

--------------------------------

### Install Drizzle Dependencies (Bash)

Source: https://nitro-graphql.pages.dev/guide/installation

Installs Drizzle ORM and its migration tool.

```bash
# Drizzle
pnpm add drizzle-orm
pnpm add -D drizzle-kit
```

--------------------------------

### Install Project Dependencies with pnpm

Source: https://nitro-graphql.pages.dev/contributing/development-setup

Installs all necessary project dependencies using pnpm. The `--frozen-lockfile` flag ensures that the exact versions specified in the lockfile are installed, preventing unexpected changes.

```bash
pnpm install --frozen-lockfile
```

--------------------------------

### Run Nitro GraphQL Playgrounds

Source: https://nitro-graphql.pages.dev/contributing/development-setup

Starts various playground environments for testing Nitro GraphQL. These commands typically require a separate terminal running `pnpm dev` for the module build watcher.

```bash
pnpm playground:nitro
```

```bash
pnpm playground:nuxt
```

```bash
pnpm playground:federation
```

--------------------------------

### Test GraphQL Mutations in Playground

Source: https://nitro-graphql.pages.dev/guide/your-first-query

Provides example GraphQL mutation requests for creating, updating, and deleting posts. These demonstrate how to send data to the server and receive responses.

```graphql
mutation CreateNewPost {
  createPost(input: {
    title: "My First Post"
    content: "This is the content"
    authorId: "1"
  }) {
    id
    title
    publishedAt
  }
}
```

```graphql
mutation UpdateExistingPost {
  updatePost(
    id: "1"
    input: {
      title: "Updated Title"
    }
  ) {
    id
    title
    content
  }
}
```

```graphql
mutation DeletePost {
  deletePost(id: "1")
}
```

--------------------------------

### GraphQL Yoga Subscription Example

Source: https://nitro-graphql.pages.dev/guide/graphql-yoga

Implements a subscription for listening to new messages using GraphQL Yoga's pub/sub capabilities. This example sets up a `messageAdded` subscription.

```typescript
export const messageSubscriptions = defineSubscription({
  messageAdded: {
    subscribe: (_, __, { pubsub }) => pubsub.asyncIterator(['MESSAGE_ADDED']),
  },
})
```

--------------------------------

### Test GraphQL Queries in Playground

Source: https://nitro-graphql.pages.dev/guide/your-first-query

Demonstrates how to execute GraphQL queries using the GraphQL Playground interface. Includes examples for fetching all posts and a single post by its ID.

```graphql
query GetAllPosts {
  posts {
    id
    title
    content
    publishedAt
  }
}
```

```graphql
query GetSinglePost {
  post(id: "1") {
    id
    title
    content
  }
}
```

--------------------------------

### Install Dependencies for Federation Subgraph

Source: https://nitro-graphql.pages.dev/examples/federation-subgraph

Installs necessary packages for creating an Apollo Federation subgraph with nitro-graphql. This includes nitro-graphql, GraphQL, h3, nitropack, and Apollo Federation components.

```bash
mkdir users-service
cd users-service
pnpm init
pnpm add nitro-graphql graphql h3 nitropack @apollo/server @apollo/subgraph @as-integrations/h3
```

--------------------------------

### Clear Node Modules and Install (Bash)

Source: https://nitro-graphql.pages.dev/guide/installation

Resets the project's dependencies by removing 'node_modules' and lock files, then performs a fresh installation using pnpm. This resolves 'Cannot find module \'nitro-graphql\' errors.

```bash
rm -rf node_modules pnpm-lock.yaml
pnpm install
```

--------------------------------

### Install Prisma and Client for Database Integration

Source: https://nitro-graphql.pages.dev/recipes/crud-operations

Installs Prisma and its client library, along with Node.js typings, to enable database integration within the project. This is a prerequisite for using Prisma with your database.

```bash
pnpm add prisma @prisma/client
pnpm add -D @types/node
```

--------------------------------

### Nitro Configuration (TypeScript)

Source: https://nitro-graphql.pages.dev/guide/installation

Configures Nitro GraphQL within a Nitro project by adding 'nitro-graphql' to modules and specifying the framework in nitro.config.ts.

```typescript
// nitro.config.ts
import { defineNitroConfig } from 'nitropack/config'

export default defineNitroConfig({
  modules: ['nitro-graphql'],
  graphql: {
    framework: 'graphql-yoga', // or 'apollo-server'
  },
})
```

--------------------------------

### Clone Nitro GraphQL Repository

Source: https://nitro-graphql.pages.dev/contributing/development-setup

This command clones the Nitro GraphQL repository from GitHub and navigates into the project directory. Ensure you have Git installed and have forked the repository first.

```bash
git clone https://github.com/YOUR_USERNAME/nitro-graphql.git
cd nitro-graphql
```

--------------------------------

### Reinstalling Playground Dependencies

Source: https://nitro-graphql.pages.dev/contributing/development-setup

This sequence of commands ensures that playground dependencies are correctly installed after a full project build. It involves navigating to the playground directory, removing existing node_modules, and reinstalling using pnpm.

```bash
# From the root directory
pnpm build

# Then reinstall playground dependencies
cd playgrounds/nitro
rm -rf node_modules
pnpm install
```

--------------------------------

### Nuxt Configuration (TypeScript)

Source: https://nitro-graphql.pages.dev/guide/installation

Configures Nitro GraphQL for a Nuxt project by adding 'nitro-graphql/nuxt' to modules and specifying the framework within the Nitro configuration in nuxt.config.ts.

```typescript
// nuxt.config.ts
export default defineNuxtConfig({
  modules: ['nitro-graphql/nuxt'],
  nitro: {
    graphql: {
      framework: 'graphql-yoga', // or 'apollo-server'
    },
  },
})
```

--------------------------------

### Activating and Preparing PNPM Version

Source: https://nitro-graphql.pages.dev/contributing/development-setup

These commands are used to manage the pnpm version, ensuring consistency and resolving potential version mismatches. 'corepack enable' activates Corepack, and 'corepack prepare' installs a specific pnpm version.

```bash
corepack enable
corepack prepare pnpm@10.18.0 --activate
```

--------------------------------

### Nuxt Layers File Structure Example

Source: https://nitro-graphql.pages.dev/guide/quick-start-nuxt

Illustrates the file structure when utilizing Nuxt layers with Nitro GraphQL. It shows how GraphQL schemas and resolvers in a base layer (`layers/base-layer/server/graphql/`) are automatically discovered and merged with the main application's GraphQL schema and resolvers.

```tree
your-nuxt-app/
├── layers/
│   └── base-layer/
│       └── server/
│           └── graphql/
│               ├── schema.graphql      # ← Discovered
│               └── posts.resolver.ts   # ← Discovered
└── server/
    └── graphql/
        ├── schema.graphql              # ← Discovered
        └── users.resolver.ts           # ← Discovered
```

--------------------------------

### Combining Multiple Nitro GraphQL Resolver Files

Source: https://nitro-graphql.pages.dev/guide/your-first-query

This example illustrates how Nitro GraphQL automatically discovers and merges resolvers defined in separate files. It shows separate files for queries, mutations, and types, emphasizing modularity and organization.

```typescript
// server/graphql/posts/queries.resolver.ts
export const postQueries = defineQuery({
  posts: () => [...],
  post: () => {...},
})
```

```typescript
// server/graphql/posts/mutations.resolver.ts
export const postMutations = defineMutation({
  createPost: () => {...},
  updatePost: () => {...},
  deletePost: () => {...},
})
```

```typescript
// server/graphql/posts/types.resolver.ts
export const postTypes = defineType({
  Post: {
    author: () => {...},
  },
})
```

--------------------------------

### Related Examples

Source: https://nitro-graphql.pages.dev/examples/federation-subgraph

Links to other examples and guides for Nitro GraphQL.

```APIDOC
## Related Examples

*   [Basic Nitro Server](./nitro-basic.md) - Start here if new to nitro-graphql
*   [Full-stack Nuxt App](./nuxt-fullstack.md) - Client-side integration
*   [External Services](./external-services.md) - Integrate third-party APIs
```

--------------------------------

### Configuration Examples (Code Groups)

Source: https://nitro-graphql.pages.dev/contributing/documentation

Shows configuration examples for integrating a module (e.g., 'nitro-graphql') into different frameworks (Nitro and Nuxt) using VitePress code groups, allowing users to select the relevant configuration.

```markdown
## Configuration

::: code-group

```typescript [Nitro]
// nitro.config.ts
export default defineNitroConfig({
  modules: ['nitro-graphql']
})
````

```typescript [Nuxt]
// nuxt.config.ts
export default defineNuxtConfig({
  modules: ['nitro-graphql']
})
```

:::

```

--------------------------------

### Install Nitro GraphQL Dependencies (Bash)

Source: https://nitro-graphql.pages.dev/examples/nitro-basic

Commands to create a new Nitro project directory, initialize package.json, and install necessary dependencies including nitro-graphql, graphql, h3, and nitropack.

```bash
mkdir my-nitro-app
cd my-nitro-app

pnpm init

pnpm add nitro-graphql graphql h3 nitropack
```

--------------------------------

### Apollo Gateway Setup (TypeScript)

Source: https://nitro-graphql.pages.dev/examples/federation-subgraph

Configures and starts an Apollo Gateway in Node.js to compose multiple GraphQL subgraphs. It uses `IntrospectAndCompose` to discover and combine schemas from specified subgraph URLs. The gateway listens on port 4000.

```typescript
import { ApolloGateway, IntrospectAndCompose } from '@apollo/gateway'
import { ApolloServer } from '@apollo/server'
import { startStandaloneServer } from '@apollo/server/standalone'

const gateway = new ApolloGateway({
  supergraphSdl: new IntrospectAndCompose({
    subgraphs: [
      { name: 'users', url: 'http://localhost:3000/api/graphql' },
      { name: 'posts', url: 'http://localhost:3001/api/graphql' },
      // Add more subgraphs as needed
    ],
  }),
})

const server = new ApolloServer({
  gateway,
})

const { url } = await startStandaloneServer(server, {
  listen: { port: 4000 },
})

console.log(`Gateway ready at ${url}`)
```

--------------------------------

### Traditional vs. Nitro GraphQL Setup (TypeScript)

Source: https://nitro-graphql.pages.dev/guide/introduction

Compares the manual setup required for a traditional GraphQL integration with the simplified, zero-config approach provided by Nitro GraphQL. The traditional approach involves manual imports and configuration of schema, resolvers, and the server. Nitro GraphQL achieves the same with minimal configuration in nitro.config.ts.

```typescript
import { makeExecutableSchema } from '@graphql-tools/schema'
import { createYoga } from 'graphql-yoga'
import { defineEventHandler } from 'h3'

import postResolvers from './resolvers/post'
// Import resolvers manually
import userResolvers from './resolvers/user'

import postSchema from './schemas/post'
// Import schemas manually
import userSchema from './schemas/user'

// Merge everything
const schema = makeExecutableSchema({
  typeDefs: [userSchema, postSchema],
  resolvers: [userResolvers, postResolvers]
})

// Configure server
const yoga = createYoga({ schema })

// Export handler
export default defineEventHandler(yoga)
```

```typescript
// nitro.config.ts
export default defineNitroConfig({
  modules: ['nitro-graphql'],
  graphql: {
    framework: 'graphql-yoga'
  }
})

// That's it! Everything else is automatic.
```

--------------------------------

### Build and Preview VitePress Docs (pnpm)

Source: https://nitro-graphql.pages.dev/contributing/documentation

Commands to build the static site for VitePress documentation and preview it locally using pnpm. Assumes the user is in the `.docs` directory.

```bash
cd .docs
pnpm build
cd .docs
pnpm preview
```

--------------------------------

### Querying the Supergraph

Source: https://nitro-graphql.pages.dev/examples/federation-subgraph

Examples of GraphQL queries that span across multiple services (subgraphs) in a federated setup.

```APIDOC
## Querying the Supergraph

Once you have the gateway running with both services, you can query across them:

```graphql
# Query that spans both services
query GetUserWithPosts {
  user(id: "1") {
    id
    name
    email
    posts {
      id
      title
      content
    }
  }
}

# Get posts with author details
query GetPostsWithAuthors {
  posts {
    id
    title
    author {
      id
      name
      email
    }
  }
}
```
```

--------------------------------

### Install Drizzle ORM Dependencies

Source: https://nitro-graphql.pages.dev/recipes/crud-operations

These commands install the necessary Drizzle ORM packages and development tools for your project.

```bash
pnpm add drizzle-orm postgres
pnpm add -D drizzle-kit
```

--------------------------------

### Define GraphQL Schema

Source: https://nitro-graphql.pages.dev/guide/quick-start-nitro

Create a `schema.graphql` file in your `server/graphql/` directory to define your GraphQL schema, including queries and mutations. The module automatically discovers schema files in this directory.

```graphql
# server/graphql/schema.graphql
type Query {
  hello: String!
  greeting(name: String!): String!
}

type Mutation {
  _empty: String
}
```

--------------------------------

### Configure package.json for Nitro Dev Server (JSON)

Source: https://nitro-graphql.pages.dev/examples/nitro-basic

Defines project name, module type, and scripts for running the Nitro development server ('nitro dev'), building the project ('nitro build'), and previewing the built application. Includes core dependencies.

```json
{
  "name": "my-nitro-app",
  "type": "module",
  "scripts": {
    "dev": "nitro dev",
    "build": "nitro build",
    "preview": "node .output/server/index.mjs"
  },
  "dependencies": {
    "graphql": "^16.11.0",
    "h3": "^2.0.1",
    "nitro-graphql": "^2.0.0-beta.1",
    "nitropack": "^3.0.1"
  }
}
```

--------------------------------

### Install Apollo Server Dependencies for Nitro GraphQL

Source: https://nitro-graphql.pages.dev/guide/apollo-server

Installs the necessary packages for using Apollo Server with Nitro GraphQL, including the core Apollo libraries and H3 integration.

```bash
pnpm add nitro-graphql @apollo/server @apollo/utils.withrequired @as-integrations/h3 graphql
```

--------------------------------

### Installation Instructions (Code Groups)

Source: https://nitro-graphql.pages.dev/contributing/documentation

Provides installation instructions for a package using VitePress code groups, offering commands for different package managers like pnpm, npm, and yarn within a single block.

```markdown
## Installation

::: code-group

```bash [pnpm]
pnpm add nitro-graphql
````

```bash [npm]
npm install nitro-graphql
```

```bash [yarn]
yarn add nitro-graphql
```

:::

```

--------------------------------

### Bash Commands for Running the Nuxt Application

Source: https://nitro-graphql.pages.dev/examples/nuxt-fullstack

This snippet provides essential bash commands for managing the Nuxt.js application. It covers starting the development server, building the application for production, and previewing the production build. It also lists the default URLs for development and the GraphQL endpoint.

```bash
# Development mode
pnpm dev

# Build for production
pnpm build

# Preview production build
pnpm preview
```

--------------------------------

### Example GraphQL Create User Mutation

Source: https://nitro-graphql.pages.dev/examples/nitro-basic

Demonstrates how to execute the `createUser` mutation using GraphQL. It specifies the fields to be returned upon successful creation, including `id`, `name`, `email`, and `createdAt`. This example is useful for testing the `createUser` resolver.

```graphql
# Create a new user
mutation CreateUser {
  createUser(input: {
    name: "Alice Johnson"
    email: "alice@example.com"
  }) {
    id
    name
    email
    createdAt
  }
}
```

--------------------------------

### Subgraph Deployment Commands (Bash)

Source: https://nitro-graphql.pages.dev/examples/federation-subgraph

This bash script outlines the steps to build and deploy an individual subgraph service. It uses `pnpm` for package management and indicates that deployment can be done to various platforms, with each subgraph having its own URL.

```bash
# Build subgraph
pnpm build

# Deploy to your platform (Vercel, Netlify, AWS, etc.)
# Each subgraph gets its own URL
```

--------------------------------

### GraphQL Client Queries (GraphQL)

Source: https://nitro-graphql.pages.dev/guide/quick-start-nuxt

Defines GraphQL queries and mutations for the client-side application. 'GetUsers' fetches a list of users, while 'CreateUser' allows creating a new user with provided input.

```graphql
# app/graphql/users/get-users.graphql
query GetUsers {
  users {
    id
    name
    email
  }
}
```

```graphql
# app/graphql/users/create-user.graphql
mutation CreateUser($input: CreateUserInput!) {
  createUser(input: $input) {
    id
    name
    email
  }
}
```

--------------------------------

### Troubleshooting Schema Composition Errors

Source: https://nitro-graphql.pages.dev/examples/federation-subgraph

Common issues and solutions for errors encountered when composing GraphQL schemas in a federated setup.

```APIDOC
## Troubleshooting

### Schema Composition Errors

If the gateway can't compose your schemas:

*   Ensure all `@key` fields exist on the entity
*   Check for conflicting field definitions
*   Validate federation directives are correct
```

--------------------------------

### Run Prisma Migrations and Generate Client

Source: https://nitro-graphql.pages.dev/recipes/database-integration

Commands to manage database schema migrations and generate the Prisma Client. `prisma migrate dev --name init` creates and applies initial migrations, `prisma generate` updates the client based on the schema, and `prisma studio` opens a GUI for database inspection.

```bash
# Create migration
npx prisma migrate dev --name init

# Generate Prisma Client
npx prisma generate

# View database in browser
npx prisma studio
```

--------------------------------

### Setup Nitro GraphQL Dependency

Source: https://nitro-graphql.pages.dev/contributing/adding-features

This snippet shows how to add the nitro-graphql package to your project using pnpm. It's a prerequisite for using the library in your examples or development.

```bash
pnpm add nitro-graphql
```

--------------------------------

### Complete Nitro GraphQL Configuration Example

Source: https://nitro-graphql.pages.dev/api/configuration

A comprehensive example of Nitro's GraphQL configuration, illustrating settings for framework, endpoints, playground, file generation, client utilities, SDK, types, paths, external services, and code generation, including loader validation.

```typescript
export default defineNitroConfig({
  graphql: {
    // Framework selection
    framework: 'graphql-yoga',

    // Endpoints
    endpoint: {
      graphql: '/api/graphql',
      healthCheck: '/api/health'
    },

    // Playground
    playground: process.env.NODE_ENV !== 'production',

    // File generation control
    scaffold: {
      graphqlConfig: true,
      serverSchema: true,
      serverConfig: true,
      serverContext: true
    },

    clientUtils: {
      index: true,
      ofetch: true
    },

    sdk: {
      main: true,
      external: true
    },

    types: {
      server: true,
      client: true,
      external: true
    },

    // Global paths
    paths: {
      serverGraphql: 'server/graphql',
      clientGraphql: 'app/graphql',
      typesDir: '.nitro/types'
    },

    // External services
    externalServices: [
      {
        name: 'github',
        schema: 'https://api.github.com/graphql',
        endpoint: 'https://api.github.com/graphql',
        headers: () => ({
          Authorization: `Bearer ${process.env.GITHUB_TOKEN}`
        }),
        documents: ['app/graphql/github/**/*.graphql']
      }
    ],

    // Code generation
    codegen: {
      server: {
        contextType: '~/server/graphql/context#GraphQLContext',
        scalars: {
          DateTime: 'Date'
        }
      },
      client: {
        scalars: {
          DateTime: 'string'
        }
      }
    },

    // File loader
    loader: {
      validate: true
    }
  }
})
```

--------------------------------

### Nitro 'dev:start' Hook for GraphQL Schema Validation

Source: https://nitro-graphql.pages.dev/api/hooks

This advanced hook example uses 'dev:start' to validate all GraphQL schemas in the 'server/graphql' directory using the 'graphql' library. It scans files, reads their content, builds the schema, and reports success or failure for each file, ensuring schema integrity during development.

```typescript
// nitro.config.ts
import { buildSchema } from 'graphql'

export default defineNitroConfig({
  graphql: {
    framework: 'graphql-yoga'
  },
  hooks: {
    'dev:start': async () => {
      // Validate all GraphQL schemas
      const schemaFiles = await glob('server/graphql/**/*.graphql')

      for (const file of schemaFiles) {
        try {
          const content = await readFile(file, 'utf-8')
          buildSchema(content)
          console.log(`✓ ${file}`)
        }
        catch (error) {
          console.error(`✗ ${file}:`, error.message)
        }
      }
    }
  }
})
```

--------------------------------

### Example Nitro Configuration

Source: https://nitro-graphql.pages.dev/contributing/documentation

A snippet showing the basic Nitro configuration file (`nitro.config.ts`) with the 'nitro-graphql' module included.

```typescript
// nitro.config.ts
export default defineNitroConfig({
  modules: ['nitro-graphql']
})
```

--------------------------------

### Nitro 'dev:start' Hook for Watch and Reload Pattern

Source: https://nitro-graphql.pages.dev/api/hooks

This example implements the 'Watch and Reload Pattern' using the 'dev:start' hook. It utilizes the 'chokidar' library to watch for changes in GraphQL schema files and triggers a regeneration process when a change is detected, ensuring the server stays up-to-date with schema modifications.

```typescript
import { watch } from 'chokidar'

export default defineNitroConfig({
  hooks: {
    'dev:start': () => {
      const watcher = watch('server/graphql/**/*.graphql')

      watcher.on('change', async (path) => {
        console.log('Schema changed:', path)
        // Trigger type regeneration
      })
    }
  }
})
```

--------------------------------

### GraphQL Schema with Custom Directives

Source: https://nitro-graphql.pages.dev/guide/custom-directives

Example of a GraphQL schema utilizing custom directives for features like authentication and caching. Directives are denoted by '@' followed by the directive name.

```graphql
type Query {
  profile: User @auth
  adminData: String @auth(requires: "ADMIN")
  expensiveData: String @cache(ttl: 300)
}
```

--------------------------------

### Virtual Imports in TypeScript

Source: https://nitro-graphql.pages.dev/guide/auto-discovery

Shows examples of virtual imports used internally by the Nitro GraphQL server for directives, resolvers, and schemas. These are for internal use and should not be used directly.

```ts
import directives from '#nitro-internal-virtual/server-directives'
import resolvers from '#nitro-internal-virtual/server-resolvers'
// Virtual import - DO NOT use directly
import schemas from '#nitro-internal-virtual/server-schemas'
```

--------------------------------

### Configure Nitro for GraphQL

Source: https://nitro-graphql.pages.dev/guide/quick-start-nitro

Add `nitro-graphql` to your Nitro modules and specify `graphql-yoga` as the framework in your `nitro.config.ts` file. This enables the GraphQL module within your Nitro project.

```typescript
import {
  defineNitroConfig
} from 'nitropack/config'

export default defineNitroConfig({
  modules: ['nitro-graphql'],
  graphql: {
    framework: 'graphql-yoga',
  },
})
```

--------------------------------

### GraphQL Schema: Non-Nullable Fields (GraphQL)

Source: https://nitro-graphql.pages.dev/guide/schemas

Example highlighting the importance of making fields non-nullable when their presence is a requirement. This improves data integrity and clarity on expected values.

```graphql
# ✅ Good - Clear requirements
type User {
  id: ID!
  name: String!
  email: String!
  bio: String        # Nullable - actually optional
}

# ❌ Bad - Everything nullable
type User {
  id: ID
  name: String
  email: String
}
```

--------------------------------

### Initialize Prisma Project

Source: https://nitro-graphql.pages.dev/recipes/crud-operations

Initializes a new Prisma project in the current directory. This command generates the necessary configuration files and directory structure for Prisma to manage your database schema.

```bash
npx prisma init
```

--------------------------------

### Nitro GraphQL File Organization Example

Source: https://nitro-graphql.pages.dev/contributing/adding-features

Illustrates the recommended directory structure for placing new code within the Nitro GraphQL project, such as types, utilities, routes, and ecosystem integrations.

```bash
src/
├── index.ts              # Add module setup code here
├── types/
│   └── index.ts          # Add new type definitions
├── utils/
│   └── your-util.ts      # Add utility functions
├── routes/
│   └── your-route.ts     # Add new route handlers
└── ecosystem/
    └── your-integration.ts  # Add framework integrations
```

--------------------------------

### Delete Build Directories (Bash)

Source: https://nitro-graphql.pages.dev/guide/installation

Removes the build cache directories for Nitro or Nuxt to force a regeneration of necessary files, often resolving TypeScript type generation problems.

```bash
# Nitro
rm -rf .nitro

# Nuxt
rm -rf .nuxt
```

--------------------------------

### Resolver Scanning Example in TypeScript

Source: https://nitro-graphql.pages.dev/guide/auto-discovery

Illustrates how Nitro GraphQL scans for exported functions using `defineQuery`, `defineMutation`, etc., to discover resolvers. Non-`define*` functions are not discovered.

```ts
// server/graphql/users.resolver.ts
export const userQueries = defineQuery({
  users: () => [], // ← Discovered
})

export const userMutations = defineMutation({
  createUser: () => ({}), // ← Discovered
})

// This won't be discovered (not using a define function)
export function someHelper() {}
```