Class: Liquid::Context

Inherits:
Object
  • Object
show all
Defined in:
lib/liquid-rails/liquid_monkey_patch.rb

Overview

Context keeps the variable stack and resolves variables, as well as keywords

context['variable'] = 'testing'
context['variable'] #=> 'testing'
context['true']     #=> true
context['10.2232']  #=> 10.2232

context.stack do
   context['bob'] = 'bobsen'
end

context['bob']  #=> nil  class Context

Instance Method Summary collapse

Instance Method Details

#find_variable(key) ⇒ Object

Fetches an object starting at the local scope and then moving up the hierachy



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# File 'lib/liquid-rails/liquid_monkey_patch.rb', line 36

def find_variable(key)
  # This was changed from find() to find_index() because this is a very hot
  # path and find_index() is optimized in MRI to reduce object allocation
  index = @scopes.find_index { |s| s.key?(key) }
  scope = @scopes[index] if index

  variable = nil

  if scope.nil?
    variable_is_nil = @environments.any? { |e| e.has_key?(key) && e[key].nil? }
    unless variable_is_nil
      @environments.each do |e|
        variable = lookup_and_evaluate(e, key)
        unless variable.nil?
          scope = e
          break
        end
      end
    end
  end

  scope ||= @environments.last || @scopes.last
  variable ||= lookup_and_evaluate(scope, key) unless variable_is_nil

  variable = variable.to_liquid
  variable.context = self if variable.respond_to?(:context=)

  variable
end