rails g graphql:install

Author: k0kubun

Gemfile

@@ -12,6 +12,7 @@ gem 'exception_notification'
 gem 'faraday'
 gem 'font-awesome-rails'
 gem 'google-analytics-rails'
+gem 'graphiql-rails', group: :development
 gem 'graphql'
 gem 'hamlit'
 gem 'jquery-rails'

Gemfile.lock

@@ -105,6 +105,8 @@ GEM
     globalid (0.4.0)
       activesupport (>= 4.2.0)
     google-analytics-rails (1.1.1)
+    graphiql-rails (1.4.4)
+      rails
     graphql (1.6.8)
     hamlit (2.8.4)
       temple (>= 0.8.0)
@@ -318,6 +320,7 @@ DEPENDENCIES
   font-awesome-rails
   foreman
   google-analytics-rails
+  graphiql-rails
   graphql
   hamlit
   jquery-rails

app/controllers/graphql_controller.rb

@@ -0,0 +1,33 @@
+class GraphqlController < ApplicationController
+  def execute
+    variables = ensure_hash(params[:variables])
+    query = params[:query]
+    operation_name = params[:operationName]
+    context = {
+      # Query context goes here, for example:
+      # current_user: current_user,
+    }
+    result = GithubRankingSchema.execute(query, variables: variables, context: context, operation_name: operation_name)
+    render json: result
+  end
+
+  private
+
+  # Handle form data, JSON body, or a blank value
+  def ensure_hash(ambiguous_param)
+    case ambiguous_param
+    when String
+      if ambiguous_param.present?
+        ensure_hash(JSON.parse(ambiguous_param))
+      else
+        {}
+      end
+    when Hash, ActionController::Parameters
+      ambiguous_param
+    when nil
+      {}
+    else
+      raise ArgumentError, "Unexpected parameter: #{ambiguous_param}"
+    end
+  end
+end

app/graphql/github_ranking_schema.rb

@@ -0,0 +1,4 @@
+GithubRankingSchema = GraphQL::Schema.define do
+  mutation(Types::MutationType)
+  query(Types::QueryType)
+end

app/graphql/mutations/.keep

@@ -0,0 +1,11 @@
+Types::MutationType = GraphQL::ObjectType.define do
+  name "Mutation"
+
+  # TODO: Remove me
+  field :testField, types.String do
+    description "An example field added by the generator"
+    resolve ->(obj, args, ctx) {
+      "Hello World!"
+    }
+  end
+end

app/graphql/types/.keep

@@ -0,0 +1,13 @@
+Types::QueryType = GraphQL::ObjectType.define do
+  name "Query"
+  # Add root-level fields here.
+  # They will be entry points for queries on your schema.
+
+  # TODO: remove me
+  field :testField, types.String do
+    description "An example field added by the generator"
+    resolve ->(obj, args, ctx) {
+      "Hello World!"
+    }
+  end
+end

app/graphql/types/mutation_type.rb

@@ -1,4 +1,9 @@
 Rails.application.routes.draw do
+  if Rails.env.development?
+    mount GraphiQL::Rails::Engine, at: "/graphiql", graphql_path: "/graphql"
+  end
+
+  post "/graphql", to: "graphql#execute"
   root to: 'top#index'
 
   authenticate :user, ->(u) { u.admin? } do