Question 1

Which gem is most commonly used to implement GraphQL in a Rails application?

Accepted Answer

The graphql-ruby gem (often called simply graphql) is the reference solution for implementing GraphQL in Rails. It provides an expressive Ruby DSL for defining types, queries and mutations, along with native Rails integration via routes and controllers. Actively maintained by Robert Mosolgo, it's used by companies like GitHub and Shopify in production.

Question 2

How to define an Object type in graphql-ruby to represent a User model?

Accepted Answer

An Object type in graphql-ruby inherits from Types::BaseObject and exposes fields via the field method. Each field specifies its name, GraphQL type (String, Int, ID, etc.) and nullability. This declarative approach allows precise control over which model data is exposed via the GraphQL API, ensuring clear separation between the ActiveRecord model and its GraphQL representation.

Question 3

What is the main difference between a Query and a Mutation in GraphQL?

Accepted Answer

Queries are used to read data (GET operations) while Mutations are used to modify data (create, update, delete). By GraphQL convention, queries are idempotent and can be executed in parallel, whereas mutations are executed sequentially to guarantee the order of side effects. This distinction is fundamental for a well-designed GraphQL API.

GraphQL with Rails

Which gem is most commonly used to implement GraphQL in a Rails application?

Câu trả lời

How to define an Object type in graphql-ruby to represent a User model?

Câu trả lời

What is the main difference between a Query and a Mutation in GraphQL?

Câu trả lời

How to declare a field with arguments in a graphql-ruby Query type?

What major performance problem frequently occurs with GraphQL and ActiveRecord associations?

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Ruby Basics

Ruby Object-Oriented Programming

Rails Fundamentals

Routing & Controllers

ActiveRecord Basics

Views & ERB Templates

ActiveRecord Associations

Advanced ActiveRecord Queries

Rails Forms

Authentication & Authorization

Modern Asset Pipeline & Frontend

Rails API Mode

Testing with RSpec

ActiveJob & Background Jobs

ActionCable & WebSockets

ActionMailer

ActiveStorage

Caching Strategies

Advanced Migrations

Rails Engines & Modular Apps

Performance Optimization

Rails Design Patterns

Ruby Metaprogramming

Rails Security

Deployment & Production

Monitoring & Logging

Rails Upgrade Strategies

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