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)
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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)
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# 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