Template Contexts

Default context for template rendering is context of default controller object.

Or if you want to, you can specify object explicitly

• helpers
• request object etc

There are three different render methods:

• render mixin: render(path, context = Object.new, locals = Hash.new)
• explicit rendering: render(template, locals = Hash.new)
• implicit rendering: render(template)
  see rango/mixins/render.rb and rango/mixins/rendering.rb for reference
  The point is explicit rendering has locals method returning a hash which is passed to render from render mixin
  @locals ||= {request: self.request}
  So you include ExplicitRendering to use
  / render into layout or render just content block if request is AJAX - extends "base.html" unless request.ajax?