module Sequel::Plugins::LazyAttributes::ClassMethods
Attributes
lazy_attributes_module[RW]
Module to store the lazy attribute getter methods, so they can be overridden and call super to get the lazy attribute behavior
Public Instance Methods
lazy_attributes(*attrs)
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Remove the given attributes from the list of columns selected by default. For each attribute given, create an accessor method that allows a lazy lookup of the attribute. Each attribute should be given as a symbol.
# File lib/sequel/plugins/lazy_attributes.rb, line 46 def lazy_attributes(*attrs) unless select = dataset.opts[:select] select = dataset.columns.map{|c| Sequel.qualify(dataset.first_source, c)} end set_dataset(dataset.select(*select.reject{|c| attrs.include?(dataset.send(:_hash_key_symbol, c))})) attrs.each{|a| define_lazy_attribute_getter(a)} end
Private Instance Methods
define_lazy_attribute_getter(a, opts=OPTS)
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Add a lazy attribute getter method to the lazy_attributes_module. Options:
- :dataset
-
The base dataset to use for the lazy attribute lookup
- :table
-
The table name to use to qualify the attribute and primary key columns.
Calls superclass method
# File lib/sequel/plugins/lazy_attributes.rb, line 59 def define_lazy_attribute_getter(a, opts=OPTS) include(self.lazy_attributes_module ||= Module.new) unless lazy_attributes_module lazy_attributes_module.class_eval do define_method(a) do if !values.has_key?(a) && !new? lazy_attribute_lookup(a, opts) else super() end end end end