{"id":26462,"date":"2017-03-13T11:14:19","date_gmt":"2017-03-13T11:14:19","guid":{"rendered":"https:\/\/dev.railscarma.com\/decent-exposure-gem-goodbye-repeating-instance-variables\/"},"modified":"2024-01-10T12:54:32","modified_gmt":"2024-01-10T12:54:32","slug":"anstandige-belichtung-juwel-auf-wiedersehen-sich-wiederholende-instanzvariablen","status":"publish","type":"post","link":"https:\/\/www.railscarma.com\/de\/blog\/fachartikel\/anstandige-belichtung-juwel-auf-wiedersehen-sich-wiederholende-instanzvariablen\/","title":{"rendered":"Decent Exposure Gem \u2013 Schluss mit sich wiederholenden Instanzvariablen"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"26462\" class=\"elementor elementor-26462\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4c8289d6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4c8289d6\" 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-abe1b56\" data-id=\"abe1b56\" 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-480a99e2 elementor-widget elementor-widget-text-editor\" data-id=\"480a99e2\" 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<h3>Einf\u00fchrung<\/h3>\n<p>Github: <a href=\"https:\/\/github.com\/hashrocket\/decent_exposure\" target=\"_blank\" rel=\"noopener noreferrer\">Ordentliches Belichtungsjuwel<\/a><br>\nDecent Exposure erm\u00f6glicht es uns, exponierte Variablen zu erstellen, die f\u00fcr alle Aktionen des Controllers verwendet werden k\u00f6nnen, anstatt Instanzvariablen zu wiederholen. Auf exponierte Variablen kann auch \u00fcber Ansichten zugegriffen werden, und sie speichern die resultierenden Werte. Mit anderen Worten, es ist ein Hilfsmittel zum Erstellen deklarativer Schnittstellen in Controllern.<\/p>\n<h3>Ein paar Punkte<\/h3>\n<ul>\n<li>Verbesserung der Kapselung<\/li>\n<li>Variablen f\u00fcr Ansichten k\u00f6nnen oben im Controller angezeigt werden<\/li>\n<li>Kompatibel mit strong_parameters, Dekorateuren<\/li>\n<li>Entlarvt Code-Ger\u00fcche.<\/li>\n<\/ul>\n<p>Schauen Sie hier: <a href=\"http:\/\/c2.com\/cgi\/wiki?CodeSmell\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/c2.com\/cgi\/wiki?CodeSmell<\/a><\/p>\n<h3>Tipps zum Spielen mit anst\u00e4ndigem Belichtungsjuwel in einer Rails-App<\/h3>\n<ul>\n<li>Edelstein hinzuf\u00fcgen <strong>&#039;decent_exposure&#039;<\/strong> in die Gemfile und f\u00fchren Sie die Bundle-Installation aus<\/li>\n<li>Wie ein Controller verwendet <strong>anst\u00e4ndige_Belichtung<\/strong> sieht aus wie:<\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2024\/01\/Decent-Exposure-Gem.png\"><img decoding=\"async\" class=\"alignnone size-full wp-image-26463\" src=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2024\/01\/Decent-Exposure-Gem.png\" alt=\"Ordentliches Belichtungsjuwel\" width=\"647\" height=\"461\"><\/a><\/p>\n<ul>\n<li>Um zu verhindern, dass vertrauliche Modellattribute versehentlich aktualisiert werden, ist \u201eDecent Exposure\u201c standardm\u00e4\u00dfig enthalten und erfordert, dass alle Parameter auf die Whitelist gesetzt werden. Es verf\u00fcgt \u00fcber eine integrierte Unterst\u00fctzung f\u00fcr die \u00dcbergabe starker Parameter.<\/li>\n<li>It deals with overexposure.The ideal number of exposures is two per controller<br>\n(1 -&gt; singular resource, e.g. item and 2 -&gt; plural collections e.g. items).<\/li>\n<li>Wenn der obere Teil der Controller-Klasse mit Expose-Anweisungen \u00fcberf\u00fcllt ist, k\u00f6nnen zwei Codeger\u00fcche auftreten, z. B. exponierende Variablen d\u00fcrfen nicht in der Ansicht verwendet werden und Controller mit mehreren Verantwortlichkeiten.<\/li>\n<li>We can utilize expose with block feature to decorate the object:<br>\nexpose(:item) { |default| ItemDecorator.new(default) }<\/li>\n<li>Wenn die Modellklassen durch einen Namespace wie Blog::Post abgedeckt sind, m\u00fcssen wir ihn beim Expose-Aufruf mit model angeben:<br>\n<blockquote><p><code>class Blog::PostsController &lt; ApplicationController<br>\nexpose(:post, model: Blog::Post)<br>\nEnde<\/code><\/p><\/blockquote>\n<\/li>\n<\/ul>\n<h3>Einige Ressourcen<\/h3>\n<p>API-\u00c4nderungen:<a href=\"https:\/\/github.com\/hashrocket\/decent_exposure\/wiki\/Api-changes-in-version-3\" target=\"_blank\" rel=\"noopener noreferrer\"> API-\u00c4nderungen in der neuen Version<\/a><br>\nRailcasts: <a href=\"http:\/\/railscasts.com\/episodes\/259-decent-exposure\" target=\"_blank\" rel=\"noopener noreferrer\">Ordentliche Belichtung<\/a><br>\nAnst\u00e4ndige Dekoration: <a href=\"https:\/\/github.com\/netguru\/decent_decoration\" target=\"_blank\" rel=\"noopener noreferrer\">Anst\u00e4ndiges Dekorationsjuwel<\/a><br>\nEin Blog: <a href=\"http:\/\/blog.remarkablelabs.com\/2013\/01\/how-to-decrease-coupling-in-your-controllers-views-with-decent_exposure-for-better-maintainability\" target=\"_blank\" rel=\"noopener noreferrer\">So verringern Sie die Kopplung in Controllern und Ansichten<\/a><\/p>\n<p>Bleiben Sie dran!<\/p>\n<p>Thanks,<\/p>\n<div class=\"author-info\"><strong>LUBAIB CEEJEY<\/strong><\/div>\n<div class=\"author-info\">Senior Ruby on Rails-Entwickler&nbsp;<\/div>\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-6ddd1337 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6ddd1337\" data-element_type=\"section\" 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       \r\n        });\r\n      });\r\n    <\/script>\r\n  <\/div>","protected":false},"excerpt":{"rendered":"<p>Einf\u00fchrung Github: Decent Exposure Gem Decent Exposure erm\u00f6glicht es uns, exponierte Variablen zu erstellen, die in den Aktionen des Controllers verwendet werden k\u00f6nnen, anstatt Instanzvariablen zu wiederholen. Exponierte Variablen sind auch von Views aus zug\u00e4nglich und speichern die resultierenden Werte. Mit anderen Worten, es ist ein Hilfsmittel zur Erstellung deklarativer Schnittstellen in Controllern. Einige Punkte Verbesserung der Verkapselung ...<\/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":31795,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[384],"tags":[],"class_list":["post-26462","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>Decent Exposure Gem - Goodbye to repeating instance variables - RailsCarma - Ruby on Rails Development Company specializing in Offshore Development<\/title>\n<meta name=\"description\" content=\"Introduction Github: Decent Exposure Gem Decent Exposure allows us to create exposed variables that can be used across the controller&#039;s actions instead\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.railscarma.com\/de\/blog\/fachartikel\/anstandige-belichtung-juwel-auf-wiedersehen-sich-wiederholende-instanzvariablen\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Decent Exposure Gem - Goodbye to repeating instance variables - RailsCarma - Ruby on Rails Development Company specializing in Offshore Development\" \/>\n<meta property=\"og:description\" content=\"Introduction Github: Decent Exposure Gem Decent Exposure allows us to create exposed variables that can be used across the controller&#039;s actions instead\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.railscarma.com\/de\/blog\/fachartikel\/anstandige-belichtung-juwel-auf-wiedersehen-sich-wiederholende-instanzvariablen\/\" \/>\n<meta property=\"og:site_name\" content=\"RailsCarma - Ruby on Rails Development Company specializing in Offshore Development\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/RailsCarma\/\" \/>\n<meta property=\"article:published_time\" content=\"2017-03-13T11:14:19+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-01-10T12:54:32+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2017\/03\/Decent-Exposure-Gem.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"300\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@railscarma\" \/>\n<meta name=\"twitter:site\" content=\"@railscarma\" \/>\n<meta name=\"twitter:label1\" content=\"Verfasst von\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Gesch\u00e4tzte Lesezeit\" \/>\n\t<meta name=\"twitter:data2\" content=\"2\u00a0Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.railscarma.com\/blog\/technical-articles\/decent-exposure-gem-goodbye-repeating-instance-variables\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.railscarma.com\/blog\/technical-articles\/decent-exposure-gem-goodbye-repeating-instance-variables\/\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\/\/www.railscarma.com\/#\/schema\/person\/5f2228a2dec7549056e709de6eb85d21\"},\"headline\":\"Decent Exposure Gem &#8211; 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