{"id":8514,"date":"2016-07-05T10:05:01","date_gmt":"2016-07-05T10:05:01","guid":{"rendered":"https:\/\/dev.railscarma.com\/application-api-with-ruby-on-rails\/"},"modified":"2024-01-10T13:23:49","modified_gmt":"2024-01-10T13:23:49","slug":"anwendungs-api-mit-ruby-auf-schienen","status":"publish","type":"post","link":"https:\/\/www.railscarma.com\/de\/blog\/fachartikel\/anwendungs-api-mit-ruby-auf-schienen\/","title":{"rendered":"Anwendungs-API mit Ruby on Rails"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"8514\" class=\"elementor elementor-8514\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3e8bda1b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3e8bda1b\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-97dfc77\" data-id=\"97dfc77\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-17b83152 elementor-widget elementor-widget-text-editor\" data-id=\"17b83152\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Was ist eine API? Warum API in ROR?<\/strong><br>\nAn API is an application programing interface. It&#8217;s an interface between inside and outside where outside interact with inside using codes. So the inside could be a server or devise like mobile, IPad, software libraries like Ruby on Rails, JQuery etc., interacting with HTTP through the web.<br>\nAPI&#8217;s are built as a component of the application. Basically we need to have a web API if we want to store and process our data in server and let any other application (web application, mobile application, iOS devices etc.) request and get data from that server if needed. These other applications can be part of your system or you can open your data for others to use.<\/p>\n<p><strong>Vorteile des Aufbaus einer API<\/strong><br>\nWir k\u00f6nnen das Frontend in Angular JS, Ember JS oder andere beliebte Client-Frameworks unterteilen, um eine individuelle Benutzeroberfl\u00e4che zu erstellen.<\/p>\n<p><strong>Vorteile :<\/strong><\/p>\n<ul>\n<li>Viel Flexibilit\u00e4t<\/li>\n<li>Geringere Wartungskosten<\/li>\n<li>H\u00f6here Skalierbarkeit<\/li>\n<li>Einfachheit<\/li>\n<li>Durch die API-Entwicklung k\u00f6nnen Sie auch andere Benutzeroberfl\u00e4chen problemlos integrieren, was viel Zeit spart.<\/li>\n<\/ul>\n<p><strong>Nachteile des Aufbaus einer API<\/strong><\/p>\n<ul>\n<li>Da der Codierer wiederholt Nachrichten mit redundanten Informationen sendet, erh\u00f6ht sich die Bandbreite.<\/li>\n<li>Vernachl\u00e4ssigbare Latenz<\/li>\n<li>Die Verwendung von Headern ist umst\u00e4ndlich und bindet die API an die HTTP-Antwort.<\/li>\n<\/ul>\n<p><strong>REST-API in Rails<\/strong><br>\nRepresentational state Transfer convention for Hadoop developed in Web.is the software architectural style for the web. The architecture is used for giving flexibility to retrieve data through some endpoints. It runs over HTTP protocol.<\/p>\n<p>How does one makes an API REQUEST?<br>\nURL = HTTP, HOSTNAME, URL<br>\nE.g. URL: -https:\/\/portal.ehealthpro.com\/blogs<\/p>\n<p>Protocol&nbsp; SERVER&nbsp; URL<\/p>\n<p>Each resource has two URI\u2019s, one represents the collections of the list i.e., <b>https:\/\/portal.ehealthpro.com\/blogs<\/b> and other represents the item, i.e. it represents the single item in that collection&nbsp;&nbsp;<b>https:\/\/portal.ehealthpro.com\/blogs\/12<\/b><br>\nFor building an API, We can use the Gem called \u201cgem rails-api\u201d<br>\nhttps:\/\/github.com\/rails-api\/rails-api , Generally, API needs to respond to uniform resource identifier (URI) and HTTTP. So,<\/p>\n<p>In Routes,<\/p>\n<p><a href=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2024\/01\/Rails-Development-1.png\"><img decoding=\"async\" class=\"aligncenter wp-image-8515 size-full\" src=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2024\/01\/Rails-Development-1.png\" alt=\"Rails-Entwicklung 1\" width=\"998\" height=\"307\"><\/a><\/p>\n<p><strong>Namensr\u00e4ume<\/strong><\/p>\n<p>Rails generator create a Userscontroller and related routes specs. In the above routes, by defining a namespace under the routes.rb file, Rails will automatically map that namespace to an index coordinating the name under the controllers folder, the api\/ directory. And the response we are acheiving via JSON format, so we just need to specify this format as the default one. Setting the API under a subdomain due to escalate the application to a DNS level.<br>\nAnd path option is to set the starting path for any request to be root in relation to the subdomain.<\/p>\n<p><strong>Versionierung<\/strong><\/p>\n<p>Versioning the&nbsp; application provides the basic structure to the API, and also when changes needs to be&nbsp; done then we&nbsp; can give developers the opportunity to adapt for the new features while old ones are being deprecated. In order to set the version for the API, we first need to add another directory under the API we created i.e. \u201cv1\u201d.we can add scope our API into different versions according to our convenience.<\/p>\n<p>Scope module: :v1,<br>\nConstraints: ApiConstraints.new(version: 1, default: true) do<br>\n&#8230;&#8230;&#8230;<br>\nEnd<\/p>\n<p><strong>Generierung des Controllers<\/strong><br>\nCommand use to generate the User controller, rails generate controller API:: v1::users<\/p>\n<p>In controller we need to do the requests respond with JSON data, Technically JSON is a lightweight data-interchange format, a collection of name\/value pairs. In various languages, this is realized as an object, record, struct, dictionary, hash table, keyed list, or associative array.<br>\nIn rails, there is a gem called Active model serializer for implementing the JSON response. By using this gem we will get the proper format of the JSON.<br>\nActive Model Serializer is a great way to build JSON responses using an object oriented approach. The objects have a very similar feel on how your ActiveModel object is set up in terms of attributes and relationships. It likewise permits you to pick your connector to decide what type of JSON structure is produced-or to build your own.<\/p>\n<p><a href=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2024\/01\/railsdeveloment2.png\"><img decoding=\"async\" class=\"aligncenter wp-image-8516 size-full\" src=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2024\/01\/railsdeveloment2.png\" width=\"988\" height=\"477\"><\/a><\/p>\n<p>HTTP Status code, is just way to uniformly tell the person what the respond is, whether the response shows error or not.<br>\nAnd some of the status code are,<br>\n200 \u2013 OK , Successful Get<br>\n204 \u2013 No content, Successful Delete or Post<br>\n201 \u2013 Created \u2013 Successful Post<br>\n422 \u2013 Unprocessable Entity<br>\n401- Unauthorized, Authentication Failure<\/p>\n<p><strong>SICHERHEIT<\/strong><br>\nFor the security reason in our API application, we can use HTTPS,<br>\nRails.application.configure do<br>\nconfig.force_ssl = true<br>\nEnde<\/p>\n<p><strong>Schlie\u00dflich,Testen der API,S<\/strong><br>\ncomand line: &#8211; curl or htttpie<br>\nBrowser: &#8211; Postman, JSON-Formatter<br>\nRspec :- Request Specs<br>\nRails Minitest :- Integration tests<\/p>\n<p><a href=\"https:\/\/www.railscarma.com\/de\/\">SchienenCarma<\/a> bietet seit 8 Jahren Ruby on Rails-Entwicklungs- und Beratungsdienstleistungen an. Unsere Entwickler sind mit allen m\u00f6glichen Aufgaben bestens vertraut <a href=\"https:\/\/www.railscarma.com\/de\/stellen-sie-einen-ruby-on-rails-entwickler-ein\/\" target=\"_blank\" rel=\"noopener noreferrer\">Ruby on Rails-Entwicklungsarbeit<\/a> und Abwicklung von Projekten jeglicher Art. <a href=\"\/de\/kontaktiere-uns\/\" target=\"_blank\" rel=\"noopener noreferrer\">Kontaktiere uns<\/a> um mehr \u00fcber unsere Entwicklungskompetenzen und die Projekte zu erfahren, die wir bearbeiten k\u00f6nnen.&nbsp;<\/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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-103ff24b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"103ff24b\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div 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Why API in ROR? An API is an application programing interface. It&#8217;s an interface between inside and outside where outside interact with inside using codes. So the inside could be a server or devise like mobile, IPad, software libraries like Ruby on Rails, JQuery etc., interacting with HTTP through the web. &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/www.railscarma.com\/de\/blog\/ruby-regex-match-guide-with-examples\/\"> <span class=\"screen-reader-text\">Ruby Regex Match Guide (2026) mit Beispielen<\/span> Weiterlesen \u00bb<\/a><\/p>","protected":false},"author":1,"featured_media":31901,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[384],"tags":[],"class_list":["post-8514","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-articles"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Application API with Ruby on Rails - Ruby on Rails Development<\/title>\n<meta name=\"description\" content=\"What is an API? 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