Golang templates (and passing funcs to template)

by

Custom functions need to be registered before parsing the templates, else the parser would not be able to tell whether an identifier is a valid function name or not. Templates are designed to be statically analyzable, and this is a requirement to that.

You can first create a new, undefined template with template.New(), and besides the template.ParseFiles() function, the template.Template type (returned by New()) also has a Template.ParseFiles() method, you can call that.

Something like this:

t, err := template.New("").Funcs(template.FuncMap{
    "makeGoName": makeGoName,
    "makeDBName": makeDBName,
}).ParseFiles("templates/struct.tpl")

Note that the template.ParseFiles() function also calls template.New() under the hood, passing the name of the first file as the template name.

Also Template.Execute() returns an error, print that to see if no output is generated, e.g.:

if err := t.Execute(os.Stdout, data); err != nil {
    fmt.Println(err)
}

More Related Contents:

  1. How to use a field of struct or variable value as template name?
  2. Calling a template with several pipeline parameters
  3. How to get a map or list of template ‘actions’ from a parsed template?
  4. Golang template engine pipelines
  5. Access a map value using a variable key in a Go template
  6. heredoc for Windows batch?
  7. How to realize website with hundreds of pages in Angular2
  8. Laravel 5 – global Blade view variable available in all templates
  9. How to escape liquid template tags?
  10. Razor views as email templates
  11. How to use dom-repeat with objects instead of arrays in Polymer 1.0?
  12. GCC(/Clang): Merging functions with identical instructions (COMDAT folding)
  13. What is the correct way to represent template classes with UML?
  14. How to set dynamic values with Kubernetes yaml file
  15. How to get a list of current variables from Jinja 2 template?
  16. Go template.ExecuteTemplate include html
  17. What’s the advantage of Logic-less template (such as mustache)?
  18. Dynamically refresh a part of the template when a variable is updated golang
  19. In a Go template range loop, are variables declared outside the loop reset on each iteration?
  20. 404 page not found – Go rendering css file
  21. Can a Jinja variable’s scope extend beyond in an inner block?
  22. Go template name
  23. Is it possible to have nested templates in Go using the standard library?
  24. How to pass multiple data to Go template?
  25. Capture or assign golang template output to variable
  26. Combining Assetic Resources across inherited templates
  27. differences between for-each and templates in xsl?
  28. Editing method comment template in Netbeans 6.9.1
  29. Handlebars.js if block helper ==
  30. How to pass selected, named arguments to Jinja2’s include context?

Leave a Comment