using Liquid variables inside of a liquid tag call

Question

I made a custom link tag in Liquid and I am trying to be able to pass liquid variables into the call for that tag like so

{{ assign id = \'something\' }} //          


        

Answer 1

It would be great to have a tag that can be called with literals and variables like

{% assign v = 'art' %}
{% link_to_article v %}

or

{% link_to_article 'art' %}

or

{% link_to_article "art" %}

and also of course

{% link_to_article include.article %}

In order to so I propose a helper function

def get_value(context, expression)
  if (expression[0]=='"' and expression[-1]=='"') or (expression[0]=="'" and expression[-1]=="'")
    # it is a literal
    return expression[1..-2]
  else
    # it is a variable
    lookup_path = expression.split('.')
    result = context
    puts lookup_path
    lookup_path.each do |variable|
      result = result[variable] if result
    end
    return result
  end
end

And in the render just call the helper function to get the value of the literal or variable.

def render(context)
  v = get_value(context, @markup.strip)
end

FYI, the initialiser would look like this:

def initialize(tag_name, markup, tokens)
  @markup = markup
  super
end