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Class: ActiveRecord::Reflection::MacroReflection

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
ActiveRecord::Reflection::AggregateReflection, ActiveRecord::Reflection::AssociationReflection, ActiveRecord::Reflection::BelongsToReflection, ActiveRecord::Reflection::HasAndBelongsToManyReflection, ActiveRecord::Reflection::HasManyReflection, ActiveRecord::Reflection::HasOneReflection
Inherits: ActiveRecord::Reflection::AbstractReflection
  • ::Object
Defined in: activerecord/lib/active_record/reflection.rb

Overview

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new(name, scope, options, active_record) ⇒ MacroReflection

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# File 'activerecord/lib/active_record/reflection.rb', line 341

def initialize(name, scope, options, active_record)
  @name          = name
  @scope         = scope
  @options       = options
  @active_record = active_record
  @klass         = options[:anonymous_class]
  @plural_name   = active_record.pluralize_table_names ?
                      name.to_s.pluralize : name.to_s
end

Instance Attribute Details

#active_record (readonly)

[ GitHub ]

  
# File 'activerecord/lib/active_record/reflection.rb', line 337

attr_reader :active_record

#autosave=(autosave) (writeonly)

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# File 'activerecord/lib/active_record/reflection.rb', line 351

def autosave=(autosave)
  @options[:autosave] = autosave
  parent_reflection = self.parent_reflection
  if parent_reflection
    parent_reflection.autosave = autosave
  end
end

#name (readonly)

Returns the name of the macro.

composed_of :balance, class_name: 'Money' returns :balance has_many :clients returns :clients

[ GitHub ]

  
# File 'activerecord/lib/active_record/reflection.rb', line 327

attr_reader :name

#options (readonly)

Returns the hash of options used for the macro.

composed_of :balance, class_name: 'Money' returns { class_name: "Money" } has_many :clients returns {}

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# File 'activerecord/lib/active_record/reflection.rb', line 335

attr_reader :options

#scope (readonly)

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# File 'activerecord/lib/active_record/reflection.rb', line 329

attr_reader :scope

Instance Method Details

#==(other_aggregation)

Returns true if self and other_aggregation have the same #name attribute, #active_record attribute, and other_aggregation has an options hash assigned to it.

[ GitHub ]

  
# File 'activerecord/lib/active_record/reflection.rb', line 384

def ==(other_aggregation)
  super ||
    other_aggregation.kind_of?(self.class) &&
    name == other_aggregation.name &&
    !other_aggregation.options.nil? &&
    active_record == other_aggregation.active_record
end

#compute_class(name)

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# File 'activerecord/lib/active_record/reflection.rb', line 378

def compute_class(name)
  name.constantize
end

#klass

Returns the class for the macro.

composed_of :balance, class_name: 'Money' returns the Money class has_many :clients returns the Client class

class Company < ActiveRecord::Base
  has_many :clients
end

Company.reflect_on_association(:clients).klass
# => Client

Note: Do not call klass.new or klass.create to instantiate a new association object. Use build_association or create_association instead. This allows plugins to hook into association object creation.

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# File 'activerecord/lib/active_record/reflection.rb', line 374

def klass
  @klass ||= compute_class(class_name)
end

#scope_for(relation, owner = nil)

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# File 'activerecord/lib/active_record/reflection.rb', line 392

def scope_for(relation, owner = nil)
  relation.instance_exec(owner, &scope) || relation
end