{"id":19367,"date":"2022-01-26T05:15:28","date_gmt":"2022-01-25T22:15:28","guid":{"rendered":"https:\/\/huongdanjava.com\/?p=19367"},"modified":"2022-01-26T05:15:28","modified_gmt":"2022-01-25T22:15:28","slug":"trait-in-raml","status":"publish","type":"post","link":"https:\/\/huongdanjava.com\/trait-in-raml.html","title":{"rendered":"Trait in RAML"},"content":{"rendered":"<p>Trait in RAML is used to define the same elements in different request URIs so that they can be reused. It&#8217;s like common class, common method in Java!<\/p>\n<p>For example, I have 2 request URIs with the following definitions:<\/p>\n<pre class=\"lang:yaml decode:true \">#%RAML 1.0\r\nbaseUri: https:\/\/localhost:8081\/api\r\ntitle: RAML Trait\r\nversion: 1.0\r\n\r\n\/students\/by-name:\r\n  get:\r\n    queryParameters:\r\n      name: string\r\n\r\n\/classes\/by-name:\r\n  get:\r\n    queryParameters:\r\n      name: string\r\n<\/pre>\n<p>In these two requests, the request parameter &#8220;name&#8221; is defined the same. Therefore, we can use Trait to define this request parameter and reuse it in 2 requests. When we change the definition for the request parameter &#8220;name&#8221;, we don&#8217;t need to edit many places anymore.<\/p>\n<p>We define the Trait for the request parameter &#8220;name&#8221; with the name &#8220;hasNameParam&#8221; as follows:<\/p>\n<pre class=\"lang:yaml decode:true \">traits: \r\n  hasNameParam:\r\n    queryParameters:\r\n      name: string<\/pre>\n<p>And to use it in URI requests, you need to declare it with the &#8220;is&#8221; keyword as follows:<\/p>\n<pre class=\"lang:yaml decode:true \">#%RAML 1.0\r\nbaseUri: https:\/\/localhost:8081\/api\r\ntitle: RAML Trait\r\nversion: 1.0\r\n\r\ntraits: \r\n  hasNameParam:\r\n    queryParameters:\r\n      name: string\r\n\r\n\/students\/by-name:\r\n  get:\r\n    is: [ hasNameParam ]\r\n\r\n\/classes\/by-name:\r\n  get:\r\n    is: [ hasNameParam ]\r\n<\/pre>\n<p><a href=\"https:\/\/huongdanjava.com\/import-raml-into-postman.html\" target=\"_blank\" rel=\"noopener\">Import this API specs into Postman<\/a>, you will see the following results:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-19369 aligncenter\" src=\"https:\/\/huongdanjava.com\/wp-content\/uploads\/2022\/01\/trait-in-raml-1.png\" alt=\"\" width=\"700\" height=\"162\" \/><\/p>\n\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-right kksr-valign-bottom\"\n    data-payload='{&quot;align&quot;:&quot;right&quot;,&quot;id&quot;:&quot;19367&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;bottom&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;0&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;0&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;4&quot;,&quot;greet&quot;:&quot;&quot;,&quot;legend&quot;:&quot;0\\\/5 - (0 votes)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;Trait in RAML&quot;,&quot;width&quot;:&quot;0&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 4px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 4px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 4px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 4px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 4px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 0px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 4px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 4px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 4px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 4px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 4px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            <span class=\"kksr-muted\"><\/span>\n    <\/div>\n    <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Trait in RAML is used to define the same elements in different request URIs so that they can be reused. It&#8217;s like common class, common method in Java! For example, I have 2 request URIs with the following definitions: #%RAML 1.0 baseUri: https:\/\/localhost:8081\/api title: RAML&hellip; <a href=\"https:\/\/huongdanjava.com\/trait-in-raml.html\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":19026,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2152],"tags":[],"class_list":["post-19367","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-raml-en","clearfix"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Trait in RAML - Huong Dan Java<\/title>\n<meta name=\"description\" content=\"In this tutorial, I introduce with you all about Trait in RAML.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/huongdanjava.com\/trait-in-raml.html\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Trait in RAML - Huong Dan Java\" \/>\n<meta property=\"og:description\" content=\"In this tutorial, I introduce with you all about Trait in RAML.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/huongdanjava.com\/trait-in-raml.html\" \/>\n<meta property=\"og:site_name\" content=\"Huong Dan Java\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/nhkhanh2406\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/nhkhanh2406\" \/>\n<meta property=\"article:published_time\" content=\"2022-01-25T22:15:28+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/huongdanjava.com\/wp-content\/uploads\/2021\/11\/raml.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"638\" \/>\n\t<meta property=\"og:image:height\" content=\"479\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Khanh Nguyen\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@https:\/\/twitter.com\/KhanhNguyenJ\" \/>\n<meta name=\"twitter:site\" content=\"@KhanhNguyenJ\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Khanh Nguyen\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/huongdanjava.com\\\/trait-in-raml.html#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/huongdanjava.com\\\/trait-in-raml.html\"},\"author\":{\"name\":\"Khanh Nguyen\",\"@id\":\"https:\\\/\\\/huongdanjava.com\\\/#\\\/schema\\\/person\\\/dc859d7f8cbea3b593e6738de9cbb82d\"},\"headline\":\"Trait in RAML\",\"datePublished\":\"2022-01-25T22:15:28+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/huongdanjava.com\\\/trait-in-raml.html\"},\"wordCount\":131,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/huongdanjava.com\\\/#\\\/schema\\\/person\\\/dc859d7f8cbea3b593e6738de9cbb82d\"},\"image\":{\"@id\":\"https:\\\/\\\/huongdanjava.com\\\/trait-in-raml.html#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/huongdanjava.com\\\/wp-content\\\/uploads\\\/2021\\\/11\\\/raml.jpeg\",\"articleSection\":[\"RAML\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/huongdanjava.com\\\/trait-in-raml.html#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/huongdanjava.com\\\/trait-in-raml.html\",\"url\":\"https:\\\/\\\/huongdanjava.com\\\/trait-in-raml.html\",\"name\":\"Trait in RAML - 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