module Sequel::Plugins::LazyAttributes::ClassMethods

Public Instance Methods

freeze() click to toggle source

Freeze lazy attributes module when freezing model class.

Calls superclass method
   # File lib/sequel/plugins/lazy_attributes.rb
42 def freeze
43   @lazy_attributes_module.freeze if @lazy_attributes_module
44 
45   super
46 end
lazy_attributes(*attrs) click to toggle source

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
51 def lazy_attributes(*attrs)
52   unless select = dataset.opts[:select]
53     select = dataset.columns.map{|c| Sequel.qualify(dataset.first_source, c)}
54   end
55   db_schema = @db_schema
56   set_dataset(dataset.select(*select.reject{|c| attrs.include?(dataset.send(:_hash_key_symbol, c))}))
57   @db_schema = db_schema
58   attrs.each{|a| define_lazy_attribute_getter(a)}
59 end

Private Instance Methods

define_lazy_attribute_getter(a, opts=OPTS) click to toggle source

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
66 def define_lazy_attribute_getter(a, opts=OPTS)
67   include(@lazy_attributes_module ||= Module.new) unless @lazy_attributes_module
68   @lazy_attributes_module.class_eval do
69     define_method(a) do
70       if !values.has_key?(a) && !new?
71         lazy_attribute_lookup(a, opts)
72       else
73         super()
74       end
75     end
76     alias_method(a, a)
77   end
78 end