{"id":37464,"date":"2023-11-14T06:44:09","date_gmt":"2023-11-14T06:44:09","guid":{"rendered":"https:\/\/www.railscarma.com\/?p=37464"},"modified":"2023-11-14T07:51:28","modified_gmt":"2023-11-14T07:51:28","slug":"construire-lapi-graphql-dans-rails-un-guide-dinstallation-rapide","status":"publish","type":"post","link":"https:\/\/www.railscarma.com\/fr\/blog\/construire-lapi-graphql-dans-rails-un-guide-dinstallation-rapide\/","title":{"rendered":"Cr\u00e9ation de l'API GraphQL dans Rails\u00a0: un guide d'installation rapide"},"content":{"rendered":"
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GraphQL, a modern query language for APIs, paired with Ruby on Rails, offers a powerful combination for streamlined API development. In this quick guide, we’ll walk through the essential steps to set up a GraphQL API in a Ruby on Rails application, providing you with a solid foundation for efficient and flexible web development.<\/p>\n

\u00c9tape 1 : Cr\u00e9er un nouveau projet Rails<\/span><\/h3>\n

frapper<\/span><\/p>\n

rails new graphql_example<\/span>
<\/p>\n
cd graphql_example<\/span><\/p><\/pre>\n
\u00c9tape 2 : Ajouter les gems n\u00e9cessaires \u00e0 votre Gemfile<\/span><\/h3>\n
Ajoutez les pierres pr\u00e9cieuses suivantes \u00e0 votre <\/span>Fichier de gemmes<\/span>:<\/span><\/p>\n
rubis<\/span><\/p>\n
gem 'graphql'<\/span>
<\/p>\n
gem 'graphiql-rails', group : :development<\/span><\/p><\/pre>\n
Courir <\/span>installation group\u00e9e<\/span> pour installer les nouvelles pierres pr\u00e9cieuses.<\/span><\/p>\n
\u00c9tape 3 : Cr\u00e9er un sch\u00e9ma GraphQL<\/span><\/h3>\n
Cr\u00e9er un fichier nomm\u00e9 <\/span>app\/graphql\/types\/query_type.rb<\/span>:<\/span><\/p>\n
rubis<\/span><\/p>\n
# app\/graphql\/types\/query_type.rb<\/span>
<\/p>\n
Types::QueryType = GraphQL::ObjectType.define do<\/span><\/p>\n
 nom 'Query' (requ\u00eate)'<\/span><\/p>\n
 description 'Le type de requ\u00eate racine'<\/span><\/p>\n
 champ :hello do<\/span><\/p>\n
 type types.String<\/span><\/p>\n
 description 'Un champ d'exemple'<\/span><\/p>\n
 resolve ->(_obj, _args, _ctx) { 'Hello, GraphQL!' }<\/span><\/p>\n
 fin<\/span><\/p>\n
fin<\/span><\/p><\/pre>\n
\u00c9tape 4 : Cr\u00e9er un contr\u00f4leur GraphQL<\/span><\/h3>\n
G\u00e9n\u00e9rer un contr\u00f4leur pour traiter les requ\u00eates GraphQL :<\/span><\/p>\n
frapper<\/span><\/p>\n
rails generate controller graphql execute<\/span><\/pre>\n
Remplacer le contenu de <\/span>app\/controllers\/graphql_controller.rb<\/span> avec les \u00e9l\u00e9ments suivants :<\/span><\/p>\n
rubis<\/span><\/p>\n
# app\/controllers\/graphql_controller.rb<\/span>
<\/p>\n
classe GraphqlController < ApplicationController<\/span><\/p>\n
 def execute<\/span><\/p>\n
 variables = ensure_hash(params[:variables])<\/span><\/p>\n
 query = params[:query]<\/span><\/p>\n
 nom_op\u00e9ration = params[:nom_op\u00e9ration]<\/span><\/p>\n
 contexte = {<\/span><\/p>\n
 # Ajoutez ici toutes les valeurs de contexte n\u00e9cessaires, telles que current_user ou session<\/span><\/p>\n
 }<\/span><\/p>\n
 result = Schema.execute(query, variables : variables, context : context, operation_name : operation_name)<\/span><\/p>\n
 render json : result<\/span><\/p>\n
 fin<\/span><\/p>\n
 priv\u00e9<\/span><\/p>\n
 def ensure_hash(variables)<\/span><\/p>\n
 variables de cas<\/span><\/p>\n
 quand Cha\u00eene<\/span><\/p>\n
 JSON.parse(variables) || {}<\/span><\/p>\n
 lorsque Hash<\/span><\/p>\n
 variables<\/span><\/p>\n
 quand nil<\/span><\/p>\n
 {}<\/span><\/p>\n
 autre<\/span><\/p>\n
 raise ArgumentError, \"Variables non valides : #{variables}\"<\/span><\/p>\n
 fin<\/span><\/p>\n
 fin<\/span><\/p>\n
fin<\/span><\/p><\/pre>\n
\u00c9tape 5 : Cr\u00e9er le sch\u00e9ma GraphQL<\/span><\/h3>\n
Cr\u00e9er un fichier nomm\u00e9 <\/span>app\/graphql\/schema.rb<\/span>:<\/span><\/p>\n
rubis<\/span><\/p>\n
# app\/graphql\/schema.rb<\/span>
<\/p>\n
Schema = GraphQL::Schema.define do<\/span><\/p>\n
 query(Types::QueryType)<\/span><\/p>\n
 # Add mutation types if needed<\/span><\/p>\n
fin<\/span><\/p><\/pre>\n
Step 6: Configure routes<\/span><\/h3>\n
Update your <\/span>config\/routes.rb<\/span> to include the GraphQL endpoint:<\/span><\/p>\n
rubis<\/span><\/p>\n
# config\/routes.rb<\/span>
<\/p>\n
Rails.application.routes.draw faire<\/span><\/p>\n
 post '\/graphql', to: 'graphql#execute'<\/span><\/p>\n
 if Rails.env.development?<\/span><\/p>\n
 mount GraphiQL::Rails::Engine, at: '\/graphiql', graphql_path: '\/graphql'<\/span><\/p>\n
 fin<\/span><\/p>\n
fin<\/span><\/p><\/pre>\n
Step 7: Run your Rails server<\/span><\/h3>\n
frapper<\/span><\/p>\n
rails s<\/span><\/pre>\n
Visit <\/span>http:\/\/localhost:3000\/graphiql<\/span> in your browser to use GraphiQL, an in-browser IDE for exploring GraphQL.<\/span><\/p>\n
In the GraphiQL interface, you can enter a query like:<\/span><\/p>\n
graphql<\/span><\/p>\n
{<\/span>
<\/p>\n
 hello<\/span><\/p>\n
}<\/span><\/p><\/pre>\n
And you should receive a response:<\/span><\/p>\n
json<\/span><\/p>\n
{<\/span>
<\/p>\n
 \"data\": {<\/span><\/p>\n
 \"hello\": \"Hello, GraphQL!\"<\/span><\/p>\n
 }<\/span><\/p>\n
}<\/span><\/p><\/pre>\n
This is a simple example, but you can expand your GraphQL schema with more types and mutations to suit your application’s needs.<\/span><\/p>\n
Conclusion<\/strong><\/h2>\n
By following this quick setup guide, you’ll be well-equipped to integrate GraphQL into your Ruby on Rails projects seamlessly. Harness the power of GraphQL to create APIs that cater to your application’s specific needs while providing an excellent developer and user experience. Get ready to elevate your API development game with the simplicity and flexibility of GraphQL in Ruby on Rails. Elevate your company’s digital presence with top-tier Ruby on Rails developers<\/a> de RailsCarma<\/a>. Our seasoned professionals bring a wealth of experience and innovation to the table, ensuring your projects are not only executed seamlessly but exceed industry standards.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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