Class Sequel::Dataset::DatasetModule
In: lib/sequel/dataset/dataset_module.rb
Parent: ::Module

This Module subclass is used by Database#extend_datasets and Dataset#with_extend to add dataset methods to classes. It adds some helper methods inside the module that can define named methods on the dataset instances which do specific actions. For example: 

  DB.extend_datasets do
    order :by_id, :id
    select :with_id_and_name, :id, :name
    where :active, :active
  end

  DB[:table].active.with_id_and_name.by_id
  # SELECT id, name FROM table WHERE active ORDER BY id

Methods

def_dataset_caching_method  

Public Class methods

def_dataset_caching_method(mod, meth)

Define a method in the module

[Source]

    # File lib/sequel/dataset/dataset_module.rb, line 29
29:       def self.def_dataset_caching_method(mod, meth)
30:         mod.send(:define_method, meth) do |name, *args, &block|
31:           if block
32:             define_method(name){public_send(meth, *args, &block)}
33:           else
34:             key = "_#{meth}_#{name}_ds""_#{meth}_#{name}_ds"
35:             define_method(name) do
36:               cached_dataset(key){public_send(meth, *args)}
37:             end
38:           end
39:         end
40:       end

[Validate]