Jekyll custom plugin ignored in post.html page - ruby

Question

I created a Jekyll tag plugin, which works fine on all template (index/about/contact/default/page) except _layout/post.html. I have tried looking for a solution on Stackoverflow and Google, but I haven't found one yet.
I created a new "products" collection within which my custom Liquid-tag plugin called to render a block of HTML code on post.html. Here's the plugin,
module Jekyll
class AmazonAffiateHelper < Liquid::Tag
def initialize(tag_name, input, tokens)
super
#input = input
end
def render(context)
input_split = split_params(#input)
output = ""
if (input_split.length > 0)
href = input_split[0].strip
src = input_split[1].strip
src2 = input_split[2].strip
href2 = input_split[3].strip
output = "<a href=\"#{href}\" target=\"_blank\"><img border=\"0\" src=\"#{src}\""
output += " width=\"150\" class=\"center-block amazon-fix \"></a>"
output += " <img src=\"#{src2}\" width=\"1\" height=\"1\" border=\"0\""
output += " alt=\"\" style=\"border:none !important; margin:0px !important;\"/>"
output += " <br><br><a href=\"#{href2}\" class=\"btn btn-amazon amazon-fix\">"
output += "BUY ON AMAZON</a>"
end
return output
end
def split_params(params)
return params.split("|")
end
end
end
Liquid::Template.register_tag('amazon', Jekyll::AmazonAffiateHelper)
Resulting output for example is something like this,
Here's is a book you might like, {% amazon variable|variable2|variable3|variable4 %}
And I am not getting anything useful from bundler exec jekyll server --trace
What am I missing? Thanks in advance
PS: I am not a coder, but I am learning.

Answer 1

I have managed to work around it by creating a new jekyll-block plugin. Not sure why I need to do it this in the first place, but it works, and the solution is below - I am sure there must be a better way of doing it.
module Jekyll
class RecommendationBlock < Liquid::Block
def initialize(tag_name, markup, tokens)
super
#input = markup
end
def render(context)
contents = super
# very important for this solution
content = Liquid::Template.parse(contents).render context
output = content
return output
end
end
end
Liquid::Template.register_tag("recommendation", Jekyll::RecommendationBlock)
And then, on the post.html, I loop through products collection
{% for product in site.products limit 5}
# product.content has the custom amazon tag {% amazon variable1|variable2...%}, which is cause the problem
{% recommendation recom }{{ product }}{% endrecommendation %}
{% endfor}
I hope it helps someone if they run into the same problem.
Thanks everyone.