Class: Graphql::Generators::InstallGenerator

Inherits:
Rails::Generators::Base
  • Object
show all
Includes:
Core
Defined in:
lib/generators/graphql/install_generator.rb

Overview

Add GraphQL to a Rails app with rails g graphql:install.

Setup a folder structure for GraphQL:

- app/
  - graphql/
    - resolvers/
    - types/
      - query_type.rb
    - loaders/
    - mutations/
    - {app_name}_schema.rb

(Add .gitkeeps by default, support --skip-keeps)

Add a controller for serving GraphQL queries:

app/controllers/graphql_controller.rb

Add a route for that controller:

# config/routes.rb
post "/graphql", to: "graphql#execute"

Accept a --relay option which adds The root node(id: ID!) field.

Accept a --batch option which adds GraphQL::Batch setup.

Use --no-graphiql to skip graphiql-rails installation.

Constant Summary collapse

GRAPHIQL_ROUTE =
<<-RUBY
if Rails.env.development?
    mount GraphiQL::Rails::Engine, at: "/graphiql", graphql_path: "/graphql"
  end
RUBY

Instance Method Summary collapse

Methods included from Core

#create_dir, #create_mutation_root_type, #insert_root_type, #schema_file_path

Instance Method Details

#create_folder_structureObject



91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
# File 'lib/generators/graphql/install_generator.rb', line 91

def create_folder_structure
  create_dir("app/graphql/types")
  template("schema.erb", schema_file_path)

  # Note: Yuo can't have a schema without the query type, otherwise introspection breaks
  template("query_type.erb", "app/graphql/types/query_type.rb")
  insert_root_type('query', 'QueryType')

  create_mutation_root_type unless options.skip_mutation_root_type?

  template("graphql_controller.erb", "app/controllers/graphql_controller.rb")
  route('post "/graphql", to: "graphql#execute"')

  if options[:batch]
    gem("graphql-batch")
    create_dir("app/graphql/loaders")
  end

  if options.api?
    say("Skipped graphiql, as this rails project is API only")
    say("  You may wish to use GraphiQL.app for development: https://github.com/skevy/graphiql-app")
  elsif !options[:skip_graphiql]
    gem("graphiql-rails", group: :development)

    # This is a little cheat just to get cleaner shell output:
    log :route, 'graphiql-rails'
    shell.mute do
      route(GRAPHIQL_ROUTE)
    end
  end

  if gemfile_modified?
    say "Gemfile has been modified, make sure you `bundle install`"
  end
end