{"id":21473,"date":"2021-05-21T05:41:21","date_gmt":"2021-05-21T05:41:21","guid":{"rendered":"https:\/\/www.devopsschool.com\/blog\/?p=21473"},"modified":"2021-05-21T05:47:08","modified_gmt":"2021-05-21T05:47:08","slug":"flutter-nosuchmethoderror-the-getter-isempty-was-called-on-null","status":"publish","type":"post","link":"https:\/\/www.devopsschool.com\/blog\/flutter-nosuchmethoderror-the-getter-isempty-was-called-on-null\/","title":{"rendered":"[SOLVED] Flutter : NoSuchMethodError: The getter ‘isEmpty’ was called on null."},"content":{"rendered":"\n

Problem<\/span><\/strong><\/h2>\n\n\n\n

I’m Calling An API and getting response in Variable Data ($data). When data is coming then there is no Error but when I’m getting null as response then getting this error Unhandled Exception: NoSuchMethodError: The getter ‘isEmpty’ was called on null.<\/strong><\/p>\n\n\n\n

When I am using the below code then it is throwing me an error:<\/p>\n\n\n\n\n\n

Solution<\/span><\/h2>\n\n\n\n

That is because $data<\/strong> returns null<\/code>, So I’ve Used <\/p>\n\n\n

<code<\/span>><\/span><span<\/span> class<\/span>=\"has-inline-color has-vivid-red-color\"<\/span>><\/span>if(data?.isEmpty ?? true)<\/span<\/span>><\/span><\/code<\/span>><\/span>\n<\/code><\/span>Code language:<\/span> HTML, XML<\/span> (<\/span>xml<\/span>)<\/span><\/small><\/pre>\n\n\n
?<\/code> prevents an error if the previous part of the expression results in null<\/code> and ?? true<\/code> results in true<\/code> if the previous part of the expression is null<\/code> and therefore treats == null<\/code> and isEmpty<\/code> the same for the if(...)<\/code> check.<\/p>\n\n\n\n
Now My Code is working Fine.<\/p>\n\n\n\n
Thanks for reading.<\/p>\n\n\n\n
Keep Coding.<\/p>\n\n\n\n
\"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"
Problem I’m Calling An API and getting response in Variable Data ($data). When data is coming then there is no Error but when I’m getting null as response then getting… <\/p>\n","protected":false},"author":19,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[6331],"tags":[5825,6204,6203,6490,6492,6645,6646],"class_list":["post-21473","post","type-post","status-publish","format-standard","hentry","category-flutter","tag-android","tag-android-studio","tag-flutter","tag-flutter-error","tag-flutter-exception","tag-isempty","tag-isempty-called-on-null"],"_links":{"self":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/21473","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/users\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/comments?post=21473"}],"version-history":[{"count":5,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/21473\/revisions"}],"predecessor-version":[{"id":21480,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/21473\/revisions\/21480"}],"wp:attachment":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/media?parent=21473"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/categories?post=21473"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/tags?post=21473"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}