Class: Dugway::Tags::Get

Inherits:
Liquid::Block
  • Object
show all
Defined in:
lib/dugway/liquid/tags/get.rb

Constant Summary collapse

Syntax = 
/((#{ Liquid::QuotedFragment })\s+)?(\w+)\s+from\s+(#{ Liquid::QuotedFragment }+)/

Instance Method Summary collapse

Constructor Details

#initialize(tag_name, markup, tokens) ⇒ Get

Returns a new instance of Get.



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# File 'lib/dugway/liquid/tags/get.rb', line 6

def initialize(tag_name, markup, tokens)
  if markup =~ Syntax
    @number_to_get = $1.present? ? $2 : nil
    @variable_name = $3
    @collection_name = $4

    @attributes = {}
    markup.scan(Liquid::TagAttributes) { |key, value|
      @attributes[key] = value
    }
  else
    raise SyntaxError.new("Syntax Error in tag 'get' - Valid syntax: get [number] [items] from [collection] order:[order]")
  end

  super
end

Instance Method Details

#render(context) ⇒ Object 



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# File 'lib/dugway/liquid/tags/get.rb', line 23

def render(context)
  @context = context

  @number_to_get = if context[@number_to_get].present?
    context[@number_to_get]
  elsif @number_to_get.present?
    @number_to_get.to_i
  elsif @attributes['limit'].present?
    if context[@attributes['limit']].present?
      context[@attributes['limit']]
    else
      @attributes['limit'].to_i
    end
  else
    nil
  end

  @order = context[@attributes['order']].present? ? context[@attributes['order']] : @attributes['order']

  context.stack do
    context['internal'] = {
      'per_page' => @number_to_get,
      'order' => @order,
      'page' => nil
    }

    context[@variable_name] = context[@collection_name]

    raise ArgumentError.new("Cannot get array '#{ @collection_name }'. Not found.")  if context[@variable_name].total_entries.nil?

    render_all @nodelist, context
  end
end