{"id":382,"date":"2022-09-14T17:19:13","date_gmt":"2022-09-14T17:19:13","guid":{"rendered":"https:\/\/jassweb.com\/new22\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed\/"},"modified":"2022-09-14T17:19:13","modified_gmt":"2022-09-14T17:19:13","slug":"solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/","title":{"rendered":"[Solved] undefined method `round\u2019 for nil:NilClass when calculating difference between dates [closed]"},"content":{"rendered":"<h2> Introduction <\/h2>\n<p>[ad_1]<\/p>\n<p>When calculating the difference between two dates, you may encounter the error &#8220;undefined method `round&#8217; for nil:NilClass&#8221;. This error occurs when the difference between the two dates is nil, meaning that the two dates are the same. This error can be solved by checking if the difference between the two dates is nil before attempting to round it. In this article, we will discuss how to solve this error and provide some examples of how to check for nil values.<\/p>\n<h2> Solution<\/h2>\n<p><\/p>\n<p>The error message &#8220;undefined method `round&#8217; for nil:NilClass&#8221; indicates that you are trying to call the round method on a nil object. This means that one of the objects you are trying to calculate the difference between is nil.<\/p>\n<p>To solve this issue, you need to check the objects you are trying to calculate the difference between and make sure they are not nil. If they are nil, you need to assign a valid value to them before attempting to calculate the difference. <\/p>\n<p><\/p>\n<div class=\"entry-content\" itemprop=\"text\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-1088640234840270\" crossorigin=\"anonymous\"><\/script><\/p>\n<p><script><\/p>\n<p><\/script><\/p>\n<p>\n<\/p>\n<div id=\"answer-34817762\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"34817762\" data-parentid=\"34816765\" data-score=\"0\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>OK, it\u2019s not possible to help you with this directly as too much code is missing (and, frankly, it\u2019s probably to much to just cut&amp;paste it in here and expect people to debug it in their brains\u2026).<\/p>\n<p>In cases like this, you have to figure out <\/p>\n<ol>\n<li>Which variable is <code>nil<\/code><\/li>\n<li>Why is it <code>nil<\/code><\/li>\n<\/ol>\n<p>In your example, there will be some call <code>xyz.round<\/code> on line 96 of <code>rent.rb<\/code>. The <code>xyz<\/code> is nil (exactly what the message says). Find why that is and your problem will go away. <\/p>\n<p>You can sprinkle your code with debug statements like <code>puts \"&gt;&gt;&gt;&gt;&gt; #{xyz.inspect}\"<\/code> or <code>logger.debug \"...\"<\/code>, or find out how to single-step a debugger if you prefer that.<\/p>\n<\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p> <span class=\"d-none\" itemprop=\"commentCount\"><\/span> <\/p>\n<\/div>\n<\/div>\n<p>solved undefined method `round\u2019 for nil:NilClass when calculating difference between dates [closed] <\/p>\n<p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-1088640234840270\" crossorigin=\"anonymous\"><\/script><\/p>\n<p><script><\/p>\n<p><\/script> <\/div>\n<p>[ad_2]<\/p>\n<p>If you are getting an error message saying &#8220;undefined method `round&#8217; for nil:NilClass&#8221; when calculating the difference between two dates, it is likely that one of the dates is nil. This means that the date is not set, and therefore cannot be used in the calculation. To fix this, you need to make sure that both dates are set before attempting to calculate the difference between them.<\/p>\n<p>The easiest way to do this is to use the <code>nil?<\/code> method to check if either of the dates is nil. If either of them is, you can set it to the current date or some other date before continuing with the calculation. For example:<\/p>\n<pre><code>if date1.nil?\n  date1 = Date.today\nend\n\nif date2.nil?\n  date2 = Date.today\nend\n\ndifference = (date2 - date1).round\n<\/code><\/pre>\n<p>Once both dates are set, you can then calculate the difference between them and round the result as needed. This should fix the &#8220;undefined method `round&#8217; for nil:NilClass&#8221; error.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction [ad_1] When calculating the difference between two dates, you may encounter the error &#8220;undefined method `round&#8217; for nil:NilClass&#8221;. This error occurs when the difference between the two dates is nil, meaning that the two dates are the same. This error can be solved by checking if the difference between the two dates is nil &#8230; <a title=\"[Solved] undefined method `round\u2019 for nil:NilClass when calculating difference between dates [closed]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/\" aria-label=\"More on [Solved] undefined method `round\u2019 for nil:NilClass when calculating difference between dates [closed]\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[455,615],"class_list":["post-382","post","type-post","status-publish","format-standard","hentry","category-solved","tag-ruby","tag-ruby-on-rails"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] undefined method `round\u2019 for nil:NilClass when calculating difference between dates [closed] - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] undefined method `round\u2019 for nil:NilClass when calculating difference between dates [closed] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"Introduction [ad_1] When calculating the difference between two dates, you may encounter the error &#8220;undefined method `round&#8217; for nil:NilClass&#8221;. This error occurs when the difference between the two dates is nil, meaning that the two dates are the same. This error can be solved by checking if the difference between the two dates is nil ... Read more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/\" \/>\n<meta property=\"og:site_name\" content=\"JassWeb\" \/>\n<meta property=\"article:published_time\" content=\"2022-09-14T17:19:13+00:00\" \/>\n<meta name=\"author\" content=\"Kirat\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Kirat\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/\"},\"author\":{\"name\":\"Kirat\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\"},\"headline\":\"[Solved] undefined method `round\u2019 for nil:NilClass when calculating difference between dates [closed]\",\"datePublished\":\"2022-09-14T17:19:13+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/\"},\"wordCount\":444,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"keywords\":[\"ruby\",\"ruby-on-rails\"],\"articleSection\":[\"Solved\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/\",\"url\":\"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/\",\"name\":\"[Solved] undefined method `round\u2019 for nil:NilClass when calculating difference between dates [closed] - JassWeb\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#website\"},\"datePublished\":\"2022-09-14T17:19:13+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/jassweb.com\/solved\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"[Solved] undefined method `round\u2019 for nil:NilClass when calculating difference between dates [closed]\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/jassweb.com\/solved\/#website\",\"url\":\"https:\/\/jassweb.com\/solved\/\",\"name\":\"JassWeb\",\"description\":\"Build High-quality Websites\",\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/jassweb.com\/solved\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\",\"name\":\"Jass Web\",\"url\":\"https:\/\/jassweb.com\/solved\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png\",\"contentUrl\":\"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png\",\"width\":693,\"height\":132,\"caption\":\"Jass Web\"},\"image\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\",\"name\":\"Kirat\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1776403586\",\"contentUrl\":\"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1776403586\",\"caption\":\"Kirat\"},\"sameAs\":[\"http:\/\/jassweb.com\"],\"url\":\"https:\/\/jassweb.com\/solved\/author\/jaspritsinghghumangmail-com\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"[Solved] undefined method `round\u2019 for nil:NilClass when calculating difference between dates [closed] - JassWeb","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/","og_locale":"en_US","og_type":"article","og_title":"[Solved] undefined method `round\u2019 for nil:NilClass when calculating difference between dates [closed] - JassWeb","og_description":"Introduction [ad_1] When calculating the difference between two dates, you may encounter the error &#8220;undefined method `round&#8217; for nil:NilClass&#8221;. This error occurs when the difference between the two dates is nil, meaning that the two dates are the same. This error can be solved by checking if the difference between the two dates is nil ... Read more","og_url":"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/","og_site_name":"JassWeb","article_published_time":"2022-09-14T17:19:13+00:00","author":"Kirat","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Kirat","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/#article","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/"},"author":{"name":"Kirat","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31"},"headline":"[Solved] undefined method `round\u2019 for nil:NilClass when calculating difference between dates [closed]","datePublished":"2022-09-14T17:19:13+00:00","mainEntityOfPage":{"@id":"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/"},"wordCount":444,"commentCount":0,"publisher":{"@id":"https:\/\/jassweb.com\/solved\/#organization"},"keywords":["ruby","ruby-on-rails"],"articleSection":["Solved"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/","url":"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/","name":"[Solved] undefined method `round\u2019 for nil:NilClass when calculating difference between dates [closed] - JassWeb","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/#website"},"datePublished":"2022-09-14T17:19:13+00:00","breadcrumb":{"@id":"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/jassweb.com\/solved\/solved-undefined-method-round-for-nilnilclass-when-calculating-difference-between-dates-closed-2\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/jassweb.com\/solved\/"},{"@type":"ListItem","position":2,"name":"[Solved] undefined method `round\u2019 for nil:NilClass when calculating difference between dates [closed]"}]},{"@type":"WebSite","@id":"https:\/\/jassweb.com\/solved\/#website","url":"https:\/\/jassweb.com\/solved\/","name":"JassWeb","description":"Build High-quality Websites","publisher":{"@id":"https:\/\/jassweb.com\/solved\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/jassweb.com\/solved\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/jassweb.com\/solved\/#organization","name":"Jass Web","url":"https:\/\/jassweb.com\/solved\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/","url":"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png","contentUrl":"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png","width":693,"height":132,"caption":"Jass Web"},"image":{"@id":"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31","name":"Kirat","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/image\/","url":"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1776403586","contentUrl":"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1776403586","caption":"Kirat"},"sameAs":["http:\/\/jassweb.com"],"url":"https:\/\/jassweb.com\/solved\/author\/jaspritsinghghumangmail-com\/"}]}},"_links":{"self":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts\/382","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/comments?post=382"}],"version-history":[{"count":0,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts\/382\/revisions"}],"wp:attachment":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/media?parent=382"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/categories?post=382"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/tags?post=382"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}