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/ - base_argument.rb - base_field.rb - base_enum.rb - base_input_object.rb - base_interface.rb - base_object.rb - base_scalar.rb - base_union.rb - query_type.rb - loaders/ - mutations/ - base_mutation.rb - {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:

ruby # 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.

TODO: also add base classes

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



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
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
# File 'lib/generators/graphql/install_generator.rb', line 100

def create_folder_structure
  create_dir("#{options[:directory]}/types")
  template("schema.erb", schema_file_path)

  ["base_object", "base_argument", "base_field", "base_enum", "base_input_object", "base_interface", "base_scalar", "base_union"].each do |base_type|
    template("#{base_type}.erb", "#{options[:directory]}/types/#{base_type}.rb")
  end

  # Note: You can't have a schema without the query type, otherwise introspection breaks
  template("query_type.erb", "#{options[:directory]}/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("#{options[:directory]}/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
      # Rails 5.2 has better support for `route`?
      if Rails::VERSION::STRING > "5.2"
        route <<-RUBY
if Rails.env.development?
  mount GraphiQL::Rails::Engine, at: "/graphiql", graphql_path: "/graphql"
end
RUBY
      else
        route <<-RUBY
if Rails.env.development?
    mount GraphiQL::Rails::Engine, at: "/graphiql", graphql_path: "/graphql"
  end
RUBY
      end
    end
  end

  if options[:playground]
    gem("graphql_playground-rails", group: :development)

    log :route, 'graphql_playground-rails'
    shell.mute do
      if Rails::VERSION::STRING > "5.2"
        route <<-RUBY
if Rails.env.development?
  mount GraphqlPlayground::Rails::Engine, at: "/playground", graphql_path: "/graphql"
end
RUBY
      else
        route <<-RUBY
if Rails.env.development?
    mount GraphqlPlayground::Rails::Engine, at: "/playground", graphql_path: "/graphql"
  end
RUBY
      end
    end

  end

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