{"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":"bygga-graphql-api-i-rails-en-snabb-installationsguide","status":"publish","type":"post","link":"https:\/\/www.railscarma.com\/sv\/blogg\/bygga-graphql-api-i-rails-en-snabb-installationsguide\/","title":{"rendered":"Att bygga GraphQL API i Rails: En snabbguide"},"content":{"rendered":"
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GraphQL, ett modernt fr\u00e5gespr\u00e5k f\u00f6r API:er, i kombination med Ruby on Rails, erbjuder en kraftfull kombination f\u00f6r str\u00f6mlinjeformad API-utveckling. I den h\u00e4r snabbguiden g\u00e5r vi igenom de viktigaste stegen f\u00f6r att st\u00e4lla in ett GraphQL API i en Ruby on Rails-applikation, vilket ger dig en solid grund f\u00f6r effektiv och flexibel webbutveckling.<\/p>\n

Steg 1: Skapa ett nytt Rails-projekt<\/span><\/h3>\n

v\u00e5ldsamt slag<\/span><\/p>\n

rails ny graphql_example<\/span>
<\/p>\n
cd graphql_example<\/span><\/p><\/pre>\n
Steg 2: L\u00e4gg till n\u00f6dv\u00e4ndiga \u00e4delstenar i din Gemfile<\/span><\/h3>\n
L\u00e4gg till f\u00f6ljande \u00e4delstenar i din <\/span>Gemfil<\/span>:<\/span><\/p>\n
rubin<\/span><\/p>\n
p\u00e4rla 'graphql'<\/span>
<\/p>\n
gem 'graphiql-rails', group: :utveckling<\/span><\/p><\/pre>\n
Springa <\/span>paketinstallation<\/span> f\u00f6r att installera de nya \u00e4delstenarna.<\/span><\/p>\n
Steg 3: Skapa ett GraphQL-schema<\/span><\/h3>\n
Skapa en fil med namnet <\/span>app\/graphql\/types\/query_type.rb<\/span>:<\/span><\/p>\n
rubin<\/span><\/p>\n
# app\/graphql\/types\/query_type.rb<\/span>
<\/p>\n
Types::QueryType = GraphQL::ObjectType.define do<\/span><\/p>\n
 namn \"Fr\u00e5ga<\/span><\/p>\n
 description \"Rotfr\u00e5getyp<\/span><\/p>\n
 f\u00e4lt :hello do<\/span><\/p>\n
 typ typer.String<\/span><\/p>\n
 description \"Ett exempel p\u00e5 ett f\u00e4lt<\/span><\/p>\n
 resolve ->(_obj, _args, _ctx) { \"Hej, GraphQL! }<\/span><\/p>\n
 slutet<\/span><\/p>\n
slutet<\/span><\/p><\/pre>\n
Steg 4: Skapa en GraphQL-kontroller<\/span><\/h3>\n
Skapa en controller f\u00f6r att hantera GraphQL-fr\u00e5gor:<\/span><\/p>\n
v\u00e5ldsamt slag<\/span><\/p>\n
rails generera controller graphql exekvera<\/span><\/pre>\n
Ers\u00e4tt inneh\u00e5llet i <\/span>app\/controllers\/graphql_controller.rb<\/span> med f\u00f6ljande:<\/span><\/p>\n
rubin<\/span><\/p>\n
# app\/controllers\/graphql_controller.rb<\/span>
<\/p>\n
klass GraphqlController < ApplikationsController<\/span><\/p>\n
 def utf\u00f6ra<\/span><\/p>\n
 variabler = ensure_hash(params[:variabler])<\/span><\/p>\n
 query = params[:query]<\/span><\/p>\n
 operation_name = params[:operationName]<\/span><\/p>\n
 sammanhang = {<\/span><\/p>\n
 # L\u00e4gg till eventuella n\u00f6dv\u00e4ndiga kontextv\u00e4rden h\u00e4r, t.ex. current_user eller session<\/span><\/p>\n
 }<\/span><\/p>\n
 result = Schema.execute(query, variabler: variabler, kontext: kontext, operation_name: operation_name)<\/span><\/p>\n
 rendera json: resultat<\/span><\/p>\n
 slutet<\/span><\/p>\n
 privat<\/span><\/p>\n
 def s\u00e4kerst\u00e4lla_hash(variabler)<\/span><\/p>\n
 fallvariabler<\/span><\/p>\n
 n\u00e4r Str\u00e4ng<\/span><\/p>\n
 JSON.parse(variabler) || {}<\/span><\/p>\n
 n\u00e4r Hash<\/span><\/p>\n
 variabler<\/span><\/p>\n
 n\u00e4r nil<\/span><\/p>\n
 {}<\/span><\/p>\n
 annan<\/span><\/p>\n
 raise ArgumentError, \"Ogiltiga variabler: #{variabler}\"<\/span><\/p>\n
 slutet<\/span><\/p>\n
 slutet<\/span><\/p>\n
slutet<\/span><\/p><\/pre>\n
Steg 5: Skapa GraphQL-schema<\/span><\/h3>\n
Skapa en fil med namnet <\/span>app\/graphql\/schema.rb<\/span>:<\/span><\/p>\n
rubin<\/span><\/p>\n
# app\/graphql\/schema.rb<\/span>
<\/p>\n
Schema = GraphQL::Schema.define do<\/span><\/p>\n
 query(Typer::QueryType)<\/span><\/p>\n
 # L\u00e4gg till mutationstyper vid behov<\/span><\/p>\n
slutet<\/span><\/p><\/pre>\n
Steg 6: Konfigurera rutter<\/span><\/h3>\n
Uppdatera din <\/span>config\/routes.rb<\/span> f\u00f6r att inkludera GraphQL-slutpunkten:<\/span><\/p>\n
rubin<\/span><\/p>\n
# config\/routes.rb<\/span>
<\/p>\n
Rails.application.routes.draw g\u00f6r<\/span><\/p>\n
 post '\/graphql', till: 'graphql#execute'<\/span><\/p>\n
 om Rails.env.utveckling?<\/span><\/p>\n
 mount GraphiQL::Rails::Engine, at: '\/graphiql', graphql_path: '\/graphql'<\/span><\/p>\n
 slutet<\/span><\/p>\n
slutet<\/span><\/p><\/pre>\n
Steg 7: K\u00f6r din Rails-server<\/span><\/h3>\n
v\u00e5ldsamt slag<\/span><\/p>\n
r\u00e4ls s<\/span><\/pre>\n
Bes\u00f6k <\/span>http:\/\/localhost:3000\/graphiql<\/span> i din webbl\u00e4sare f\u00f6r att anv\u00e4nda GraphiQL, en IDE i webbl\u00e4saren f\u00f6r att utforska GraphQL.<\/span><\/p>\n
I GraphiQL-gr\u00e4nssnittet kan du ange en fr\u00e5ga som:<\/span><\/p>\n
graphql<\/span><\/p>\n
{<\/span>
<\/p>\n
 hej<\/span><\/p>\n
}<\/span><\/p><\/pre>\n
Och du b\u00f6r f\u00e5 ett svar:<\/span><\/p>\n
json<\/span><\/p>\n
{<\/span>
<\/p>\n
 \"data\": {<\/span><\/p>\n
 \"hello\": \"Hej, GraphQL!\"<\/span><\/p>\n
 }<\/span><\/p>\n
}<\/span><\/p><\/pre>\n
Detta \u00e4r ett enkelt exempel, men du kan ut\u00f6ka ditt GraphQL-schema med fler typer och mutationer f\u00f6r att passa din applikations behov.<\/span><\/p>\n
Slutsats<\/strong><\/h2>\n
Genom att f\u00f6lja denna snabbinstallationsguide kommer du att vara v\u00e4l rustad f\u00f6r att integrera GraphQL i dina Ruby on Rails-projekt s\u00f6ml\u00f6st. Utnyttja kraften i GraphQL f\u00f6r att skapa API:er som tillgodoser din applikations specifika behov samtidigt som du ger en utm\u00e4rkt utvecklar- och anv\u00e4ndarupplevelse. G\u00f6r dig redo att h\u00f6ja ditt API-utvecklingsspel med enkelheten och flexibiliteten hos GraphQL i Ruby on Rails. H\u00f6j ditt f\u00f6retags digitala n\u00e4rvaro med Ruby on Rails-utvecklare p\u00e5 h\u00f6gsta niv\u00e5<\/a> fr\u00e5n RailsCarma<\/a>. V\u00e5ra erfarna medarbetare bidrar med en m\u00e4ngd erfarenheter och innovationer och ser till att dina projekt inte bara genomf\u00f6rs s\u00f6ml\u00f6st utan \u00e4ven \u00f6vertr\u00e4ffar branschstandarderna.<\/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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