Class: ActiveDelegate::Attributes

Inherits:
Delegator
  • Object
show all
Defined in:
lib/active_delegate/attributes.rb

Overview

Delegates attributes to an associated model

Instance Attribute Summary

Attributes inherited from Delegator

#model, #options

Instance Method Summary collapse

Methods inherited from Delegator

#association_class, #association_name, #association_reflection, #delegation_args, #delegation_options, #delegation_prefix, #initialize

Constructor Details

This class inherits a constructor from ActiveDelegate::Delegator

Instance Method Details

#association_table ⇒ Object 



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# File 'lib/active_delegate/attributes.rb', line 31

def association_table
  association_class.table_name
end

#attribute_options ⇒ Object 



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# File 'lib/active_delegate/attributes.rb', line 26

def attribute_options
  keys = i[cast_type default define alias writer dirty localized finder scope]
  options.select { |k, _v| k.in? keys }.merge(prefix: delegation_prefix)
end

#call ⇒ Object 



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# File 'lib/active_delegate/attributes.rb', line 64

def call
  redefine_build_association(association_name)

  delegatable_attributes.each do |attribute|
    delegate_methods(attribute.delegatable_methods)
    define_model_class_methods(attribute)

    define_attribute_methods(attribute)
    define_attribute_queries(attribute)
  end
end

#default_options ⇒ Object 



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# File 'lib/active_delegate/attributes.rb', line 10

def default_options
  {
    except:    [],
    only:      [],
    writer:    true,
    dirty:     true,
    localized: false,
    define:    true,
    finder:    false,
    scope:     false,
    to:        nil,
    prefix:    nil,
    allow_nil: false
  }
end

#delegatable_attributes ⇒ Object 



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# File 'lib/active_delegate/attributes.rb', line 51

def delegatable_attributes
  attributes  = delegation_args(association_class.attribute_names)
  attributes -= excluded_attributes

  attributes.map! do |attribute_name|
    ActiveDelegate::Attribute::Object.new(
      attribute_name, association_class, attribute_options
    )
  end

  attributes.reject { |a| model.has_attribute?(a.prefixed) }
end

#excluded_attributes ⇒ Object 



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# File 'lib/active_delegate/attributes.rb', line 35

def excluded_attributes
  excluded  = i[created_at updated_at]
  excluded << association_reflection.active_record_primary_key.to_sym

  for_key   = association_reflection.foreign_key
  excluded << for_key.to_sym if for_key.present?

  sti_col   = association_class.inheritance_column
  excluded << sti_col.to_sym if sti_col.present?

  assoc_as  = association_reflection.options[:as]
  excluded += [:"#{assoc_as}_type", :"#{assoc_as}_id"] if assoc_as.present?

  excluded
end