Clever Geek Handbook

Create dynamic ERB templates?

I am using ERB to generate HTML snippets. So I have a (html.erb) template that looks like this:

<html><head><title>Artsy</title></head>
  <body>
    <div id='name-container'>
      <%= @name %>
    </div>
  </body>
</html>

And after rendering it looks like this:

<html><head><title>Artsy</title></head>
  <body>
    <div id='name-container'>
      Johnny
    </div>
  </body>
</html>

I have several related questions:

Say that I want the user to be able to modify the ERB templates visually, so that he, for example, can move the container using id = 'name-container'

to another part of the template. What should I learn to do this?

ERB is a templating engine for Ruby and I use it because the values ​​I have come from a Ruby application. However, if I want to explore alternatives on how to do this (having a template and being able to pass expected parameters like @name), what should I be looking for?

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2 answers


Custom editable erb templates are a bad idea because they are not isolated at all: a user can easily write erb with destructive side effects (either intentionally or not), or end up relying on aspects of your application that you want to change.



Use a templating language designed for this purpose, like liquid

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Using the dom I developed, you can create HTML strings directly from Ruby code. Using it, you can do things like:



require "dom"
["foo".dom(:span, class: "bold"), "bar"].dom(:div).dom(:body).dom(:html)
# => "<html><body><div><span class=\"bold\">foo</span>bar</div></body></html>"
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