Module: ActiveEntity::AttributeMethods

Extended by:
ActiveSupport::Autoload, ActiveSupport::Concern
Includes:
AMAttributeMethods
Included in:
Base
Defined in:
lib/active_entity/attribute_methods.rb,
lib/active_entity.rb,
lib/active_entity/attribute_methods/read.rb,
lib/active_entity/attribute_methods/dirty.rb,
lib/active_entity/attribute_methods/query.rb,
lib/active_entity/attribute_methods/write.rb,
lib/active_entity/attribute_methods/primary_key.rb,
lib/active_entity/attribute_methods/serialization.rb,
lib/active_entity/attribute_methods/before_type_cast.rb,
lib/active_entity/attribute_methods/time_zone_conversion.rb

Overview

Active Entity Attribute Methods

Defined Under Namespace

Modules: BeforeTypeCast, ClassMethods, Dirty, PrimaryKey, Query, Read, Serialization, TimeZoneConversion, Write Classes: GeneratedAttributeMethods

Constant Summary collapse

RESTRICTED_CLASS_METHODS = 
%w(private public protected allocate new name parent superclass)

Constants included from AMAttributeMethods

ActiveEntity::AMAttributeMethods::CALL_COMPILABLE_REGEXP, ActiveEntity::AMAttributeMethods::NAME_COMPILABLE_REGEXP

Class Method Summary collapse

Instance Method Summary collapse

Methods included from AMAttributeMethods

#attribute_missing, #method_missing, #respond_to?, #respond_to_without_attributes?

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class ActiveEntity::AMAttributeMethods

Class Method Details

.dangerous_attribute_methods ⇒ Object

:nodoc:



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# File 'lib/active_entity/attribute_methods.rb', line 523

def dangerous_attribute_methods # :nodoc:
  @dangerous_attribute_methods ||= (
  Base.instance_methods +
    Base.private_instance_methods -
    Base.superclass.instance_methods -
    Base.superclass.private_instance_methods
  ).map { |m| -m.to_s }.to_set.freeze
end

Instance Method Details

#[](attr_name) ⇒ Object

Returns the value of the attribute identified by attr_name after it has been typecast (for example, “2004-12-12” in a date column is cast to a date object, like Date.new(2004, 12, 12)). It raises ActiveModel::MissingAttributeError if the identified attribute is missing.

Note: :id is always present.

class Person < ActiveEntity::Base
  belongs_to :organization
end

person = Person.new(name: 'Francesco', age: '22')
person[:name] # => "Francesco"
person[:age]  # => 22

person = Person.select('id').first
person[:name]            # => ActiveModel::MissingAttributeError: missing attribute: name
person[:organization_id] # => ActiveModel::MissingAttributeError: missing attribute: organization_id



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# File 'lib/active_entity/attribute_methods.rb', line 786

def [](attr_name)
  read_attribute(attr_name) { |n| missing_attribute(n, caller) }
end

#[]=(attr_name, value) ⇒ Object

Updates the attribute identified by attr_name with the specified value. (Alias for the protected #write_attribute method).

class Person < ActiveEntity::Base
end

person = Person.new
person[:age] = '22'
person[:age] # => 22
person[:age].class # => Integer



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# File 'lib/active_entity/attribute_methods.rb', line 800

def []=(attr_name, value)
  write_attribute(attr_name, value)
end

#_has_attribute?(attr_name) ⇒ Boolean

:nodoc:

Returns:

  • (Boolean) 


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# File 'lib/active_entity/attribute_methods.rb', line 698

def _has_attribute?(attr_name) # :nodoc:
  @attributes.key?(attr_name)
end

#attribute_for_inspect(attr_name) ⇒ Object

Returns an #inspect-like string for the value of the attribute attr_name. String attributes are truncated up to 50 characters, Date and Time attributes are returned in the :db format. Other attributes return the value of #inspect without modification.

person = Person.create!(name: 'David Heinemeier Hansson ' * 3)

person.attribute_for_inspect(:name)
# => "\"David Heinemeier Hansson David Heinemeier Hansson ...\""

person.attribute_for_inspect(:created_at)
# => "\"2012-10-22 00:15:07\""

person.attribute_for_inspect(:tag_ids)
# => "[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]"



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# File 'lib/active_entity/attribute_methods.rb', line 742

def attribute_for_inspect(attr_name)
  attr_name = attr_name.to_s
  value = _read_attribute(attr_name)
  format_for_inspect(value)
end

#attribute_names ⇒ Object

Returns an array of names for the attributes available on this object.

class Person < ActiveEntity::Base
end

person = Person.new
person.attribute_names
# => ["id", "created_at", "updated_at", "name", "age"]



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# File 'lib/active_entity/attribute_methods.rb', line 710

def attribute_names
  @attributes.keys
end

#attribute_present?(attr_name) ⇒ Boolean

Returns true if the specified attribute has been set by the user or by a database load and is neither nil nor empty? (the latter only applies to objects that respond to empty?, most notably Strings). Otherwise, false. Note that it always returns true with boolean attributes.

class Task < ActiveEntity::Base
end

task = Task.new(title: '', is_done: false)
task.attribute_present?(:title)   # => false
task.attribute_present?(:is_done) # => true
task.title = 'Buy milk'
task.is_done = true
task.attribute_present?(:title)   # => true
task.attribute_present?(:is_done) # => true

Returns:

  • (Boolean) 


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# File 'lib/active_entity/attribute_methods.rb', line 763

def attribute_present?(attr_name)
  attr_name = attr_name.to_s
  value = _read_attribute(attr_name)
  !value.nil? && !(value.respond_to?(:empty?) && value.empty?)
end

#attributes ⇒ Object

Returns a hash of all the attributes with their names as keys and the values of the attributes as values.

class Person < ActiveEntity::Base
end

person = Person.create(name: 'Francesco', age: 22)
person.attributes
# => {"id"=>3, "created_at"=>Sun, 21 Oct 2012 04:53:04, "updated_at"=>Sun, 21 Oct 2012 04:53:04, "name"=>"Francesco", "age"=>22}



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# File 'lib/active_entity/attribute_methods.rb', line 722

def attributes
  @attributes.to_hash
end

#has_attribute?(attr_name) ⇒ Boolean

Returns true if the given attribute is in the attributes hash, otherwise false.

class Person < ActiveEntity::Base
  alias_attribute :new_name, :name
end

person = Person.new
person.has_attribute?(:name)     # => true
person.has_attribute?(:new_name) # => true
person.has_attribute?('age')     # => true
person.has_attribute?(:nothing)  # => false

Returns:

  • (Boolean) 


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# File 'lib/active_entity/attribute_methods.rb', line 692

def has_attribute?(attr_name)
  attr_name = attr_name.to_s
  attr_name = self.class.attribute_aliases[attr_name] || attr_name
  @attributes.key?(attr_name)
end