Class: ActiveRecord::Fusion::Association

Inherits:
Object
  • Object
show all
Defined in:
lib/active_record/fusion.rb

Overview

:nodoc:

Instance Method Summary collapse

Constructor Details

#initialize(reflection, options = nil) ⇒ Association

Returns a new instance of Association.



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# File 'lib/active_record/fusion.rb', line 89

def initialize(reflection, options = nil)
  @reflection = reflection
  @options = options.is_a?(Hash) ? options : { only: options }
  @options.assert_valid_keys(:only, :except)      
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object 



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# File 'lib/active_record/fusion.rb', line 95

def method_missing(method, *args, &block)
  if @reflection.respond_to? method
    @reflection.send(method, *args, &block)
  else
    super
  end
end

Instance Method Details

#attributes ⇒ Object 



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# File 'lib/active_record/fusion.rb', line 103

def attributes
  unless @attributes
    only = Array.wrap(@options[:only]).map(&:to_s)
    except = Array.wrap(@options[:except]).map(&:to_s)

    @attributes = klass.attribute_names
    @attributes &= only if only.any?
    @attributes -= active_record.attribute_names
    @attributes -= [foreign_key] unless belongs_to?
    @attributes -= except if except.any?
  end
  @attributes
end

#each_column ⇒ Object 



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# File 'lib/active_record/fusion.rb', line 117

def each_column
  attributes.each do |name|
    yield(name, klass.columns_hash[name], klass.serialized_attributes[name])
  end
end

#joins ⇒ Object 



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# File 'lib/active_record/fusion.rb', line 127

def joins
  dep = ActiveRecord::Associations::JoinDependency.new(active_record, name, [])
  dep.join_associations.each{ |a| a.join_type = Arel::OuterJoin }
end

#selects ⇒ Object 



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# File 'lib/active_record/fusion.rb', line 123

def selects     
  @select ||= attributes.map{ |name| klass.arel_table[name] }
end