Module: Sequel::Plugins::InvertedSubsets

Defined in:
lib/sequel/plugins/inverted_subsets.rb

Overview

The inverted_subsets plugin adds another method for each defined subset, which inverts the condition supplied. By default, inverted subset method names are prefixed with not_.

You can change the prefix, or indeed entirely customise the inverted names, by passing a block to the plugin configuration:

# Use an exclude_ prefix for inverted subsets instead of not_
Album.plugin(:inverted_subsets){|name| "exclude_#{name}"}

Usage:

# Add inverted subsets in the Album class
Album.plugin :inverted_subsets

# This will now create two methods, published and not_published
Album.subset :published, :published => true

Album.published.sql
# SELECT * FROM albums WHERE (published IS TRUE)

Album.not_published.sql
# SELECT * FROM albums WHERE (published IS NOT TRUE)

Defined Under Namespace

Modules: ClassMethods

Constant Summary collapse

DEFAULT_NAME_BLOCK =

Default naming for inverted subsets

lambda{|name| "not_#{name}"}

Class Method Summary collapse

Class Method Details

.configure(model, &block) ⇒ Object

Store the supplied block for calling later when subsets are defined, or create a default one if we need to.



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# File 'lib/sequel/plugins/inverted_subsets.rb', line 33

def self.configure(model, &block)
  model.instance_variable_set(:@inverted_subsets_name_block, block || DEFAULT_NAME_BLOCK)
end