Rails 5 + ROM 4 + GraphQL + Clean Architecture example application

This is a sample app which shows how Rails 5, ROM 4.0, GraphQL and Clean Architecture might work together.

Requirements

• ruby 2.4.2
• postgresql 10

What's done already

By libs

• N+1 issue by BatchLoader app/graphql/types/user_type.rb.

By own implementation - feedback is appreciated!

• Abstraction on BatchLoader(more DRY implementation)[refactor] Abstraction in resolvers | 6930a13
• modularization of fields in QueryType app/graphql/query_type.rb
• Implementation of Clean Architecture
• Separation of seeds by the environment db/seeds.rb
• Loading relations one-to-many without N+1, fixed by naive implementation - BatchLoader issue#5
• Modularization project "per feature"(app/concepts/*)
• Global container(dry-container) with auto-registration repositories

What's to be done

• Sample use case
• Mutations
• Tests
• Sample pagination
• Translation from queries Abstract Syntax Tree to Ruby Object Mapper API - the best solution is adapter, but it's a future voice

Known issues

• camelCase in queries(thx RadoMark)fix

Links

• Application demo GraphiQL: https://rails-graphql-rom-example-app.herokuapp.com/graphiql

Example Query(can be used in graphiql)

query {
  users{
    username
    email
    posts{
      id
      content
      title
      created_at
      updated_at
      comments {
        id
        content
        created_at
        updated_at
        author_id
        post_id
      }
    }
    comments {
        id
        content
        created_at
        updated_at
        author_id
        post_id
    }
  }
}