Module | Sequel::Plugins::BooleanReaders |
In: |
lib/sequel/plugins/boolean_readers.rb
|
The BooleaReaders plugin allows for the creation of attribute? methods for boolean columns, which provide a nicer API. By default, the accessors are created for all columns of type :boolean. However, you can provide a block to the plugin to change the criteria used to determine if a column is boolean. The block is yielded with the column symbol for each column in the models dataset.
Usage:
# Add boolean attribute? methods for all columns of type :boolean # in all model subclasses (called before loading subclasses) Sequel::Model.plugin :boolean_readers # Add boolean readers for all tinyint columns in the Album class Album.plugin(:boolean_readers){|c| db_schema[c][:db_type] =~ /\Atinyint/} # Add a boolean reader for a specific columns in the Artist class Artist.plugin(:boolean_readers){|c| [:column1, :column2, :column3].include?(c)}
DEFAULT_BOOLEAN_ATTRIBUTE_PROC | = | lambda{|c| s = db_schema[c] and s[:type] == :boolean} | Default proc for determining if given column is a boolean, which just checks that the :type is boolean. |
Add the boolean_attribute? class method to the model, and create attribute? boolean reader methods for the class‘s columns if the class has a dataset.
# File lib/sequel/plugins/boolean_readers.rb, line 28 28: def self.configure(model, &block) 29: model.meta_def(:boolean_attribute?, &(block || DEFAULT_BOOLEAN_ATTRIBUTE_PROC)) 30: model.instance_eval{send(:create_boolean_readers) if @dataset} 31: end