Golang : How to fix html/template : "somefile" is undefined error?


Tags : golang html-template undefined-error parse-html

One of the most common mistakes when using html/template package ExecuteTemplate() function is forgetting to parse the HTML file first before executing the template.


Without parsing the HTML file, you will get the error message

html/template : "somefile or some html code" is undefined

html/template : "somefile or some html code" is undefined


when trying to run your program. Trouble is that this error message is not verbose enough to point out what exactly is causing the error.

To fix the error message, simply parse the file first either with

https://golang.org/pkg/html/template/#Template.Parse

https://golang.org/pkg/html/template/#Template.ParseFiles

A good habit is always remember to count the number of HTML files that you need to execute and make sure the same number of HTML files are being parsed first.

Happy coding!

References :

https://golang.org/pkg/html/template/#Template.ExecuteTemplate

https://www.facebook.com/photo.php?fbid=2867562059977247&set=gm.1513896578758783&type=3&theater&ifg=1

  See also : Golang : How to use if, eq and print properly in html template



Tags : golang html-template undefined-error parse-html

By Adam Ng(黃武俊)

IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.


Advertisement