class Liquid::Decrement

@liquid_public_docs @liquid_type tag @liquid_category variable @liquid_name decrement @liquid_summary

Creates a new variable, with a default value of -1, that's decreased by 1 with each subsequent call.

@liquid_description

Variables that are declared with `decrement` are unique to the [layout](/themes/architecture/layouts), [template](/themes/architecture/templates),
or [section](/themes/architecture/sections) file that they're created in. However, the variable is shared across
[snippets](/themes/architecture#snippets) included in the file.

Similarly, variables that are created with `decrement` are independent from those created with [`assign`](/api/liquid/tags#assign)
and [`capture`](/api/liquid/tags#capture). However, `decrement` and [`increment`](/api/liquid/tags#increment) share
variables.

@liquid_syntax

{% decrement variable_name %}

@liquid_syntax_keyword variable_name The name of the variable being decremented.

Public Class Methods

new(tag_name, markup, options) click to toggle source
Calls superclass method Liquid::Tag::new
# File lib/liquid/tags/decrement.rb, line 22
def initialize(tag_name, markup, options)
  super
  @variable = markup.strip
end

Public Instance Methods

render_to_output_buffer(context, output) click to toggle source
# File lib/liquid/tags/decrement.rb, line 27
def render_to_output_buffer(context, output)
  value = context.environments.first[@variable] ||= 0
  value -= 1
  context.environments.first[@variable] = value
  output << value.to_s
  output
end