Gain insights into GraphQL's architecture and methodology. Learn about setting up servers, performing complex queries, and updating data with mutations using Apollo Server and Node.js. Discover practical deployment.

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GraphQL is a query language for web APIs and a runtime for fulfilling queries with existing data. GraphQL gives clients the power to ask for precisely what they need, making it easy to evolve APIs with powerful developer tools.

This course is an introduction to GraphQL using the Node.js JavaScript runtime environment and Apollo Server. You’ll start with an introduction to GraphQL’s architecture and functions before exploring the structure of GraphQL data and learning to perform meaningful, complex queries. You’ll then learn how to update server data using mutations. Next, you’ll explore the GraphQL type system and schemas to set up a GraphQL server using Apollo Server. Once the server is set up, you’ll implement a full GraphQL application using Apollo and Node.js.

By the end of this course, you’ll have a rich understanding of GraphQL’s architecture and methodology and be prepared to deploy GraphQL applications to the web using Apollo and Node.js.

Getting Started with GraphQL using Node.js

# Problem statement

- Write a GraphQL mutation to update a `pizza`.

- The mutation must have an operation named `UpdatePizza`.

- The mutation must have `id`, `pizza`, and `toppings` from `updatePizza`. Don’t forget to include `id` and `topping` for `toppings`.

- The mutation must have `id`, `pizza`, and `toppings` as arguments.

- The mutation must have `id` as a required variable, and `pizza` and `toppings` as optional variables.


# Expected output
The query should have an output like the JSON below.

```
{
  "data": {
    "updatePizza": {
      "id": 1,
      "pizza": "my new pizza",
      "toppings": [
        {
          "id": 1,
          "topping": "Cheesy"
        }
      ]
    }
  }
}
```


Take this challenge to test your knowledge of GraphQL mutation.


Challenge 1: Pizza Mutation

Take this challenge to test your knowledge of GraphQL mutation.

Introduction

Getting to Know GraphQL

Queries

Mutations

Schemas and Types

Schema Validation

Schema Execution

Schema Introspection

GraphQL Best Practices

GraphQL Exam

Challenge: Pizza Mutation

Problem statement