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`](/docs/api/liquid/tags/assign) and [`capture`](/docs/api/liquid/tags/capture). However, `decrement` and [`increment`](/docs/api/liquid/tags/increment) share variables.
@liquid_syntax
{% decrement variable_name %}
@liquid_syntax_keyword variable_name
The name of the variable being decremented.
Attributes
Public Class Methods
Source
# File lib/liquid/tags/decrement.rb, line 24 def initialize(tag_name, markup, options) super @variable_name = markup.strip end
Calls superclass method
Liquid::Tag::new
Public Instance Methods
Source
# File lib/liquid/tags/decrement.rb, line 29 def render_to_output_buffer(context, output) counter_environment = context.environments.first value = counter_environment[@variable_name] || 0 value -= 1 counter_environment[@variable_name] = value output << value.to_s output end