Class: Sequel::Model::Associations::OneToOneAssociationReflection

Inherits:

OneToManyAssociationReflection

• Object
• Hash
• AssociationReflection
• OneToManyAssociationReflection
• Sequel::Model::Associations::OneToOneAssociationReflection

Defined in:

lib/sequel/model/associations.rb

Constant Summary

Constants included from Inflections

Inflections::CAMELIZE_CONVERT_REGEXP, Inflections::CAMELIZE_MODULE_REGEXP, Inflections::DASH, Inflections::DEMODULIZE_CONVERT_REGEXP, Inflections::EMPTY_STRING, Inflections::SLASH, Inflections::UNDERSCORE, Inflections::UNDERSCORE_CONVERT_REGEXP1, Inflections::UNDERSCORE_CONVERT_REGEXP2, Inflections::UNDERSCORE_CONVERT_REPLACE, Inflections::UNDERSCORE_MODULE_REGEXP, Inflections::VALID_CONSTANT_NAME_REGEXP

Instance Method Summary

• #eager_limit_strategy ⇒ Object

  one_to_one associations don’t use an eager limit strategy by default, but support both DISTINCT ON and window functions as strategies.

• #limit_and_offset ⇒ Object

  The limit and offset for this association (returned as a two element array).

• #returns_array? ⇒ Boolean

  one_to_one associations return a single object, not an array.

Methods inherited from OneToManyAssociationReflection

#associated_object_keys, #can_have_associated_objects?, #default_key, #predicate_key, #primary_key, #qualified_primary_key, #reciprocal_array?, #remove_before_destroy?, #remove_should_check_existing?, #set_reciprocal_to_self?

Methods inherited from AssociationReflection

#_add_method, #_remove_all_method, #_remove_method, #_setter_method, #add_method, #apply_dataset_changes, #associated_class, #associated_dataset, #association_method, #can_have_associated_objects?, #dataset_method, #dataset_need_primary_key?, #eager_graph_lazy_dataset?, #eager_loader_key, #eager_loading_predicate_key, #eager_loading_use_associated_key?, #need_associated_primary_key?, #predicate_keys, #qualify, #qualify_assoc, #qualify_cur, #reciprocal, #reciprocal_array?, #remove_all_method, #remove_before_destroy?, #remove_method, #remove_should_check_existing?, #select, #set_reciprocal_to_self?, #setter_method, #slice_range

Methods included from Inflections

clear, irregular, plural, singular, uncountable

Methods inherited from Hash

#&, #case, #hstore, #pg_json, #sql_expr, #sql_negate, #sql_or, #|, #~

Instance Method Details

#eager_limit_strategy ⇒ Object

one_to_one associations don’t use an eager limit strategy by default, but support both DISTINCT ON and window functions as strategies.

# File 'lib/sequel/model/associations.rb', line 483

def eager_limit_strategy
  cached_fetch(:_eager_limit_strategy) do
    offset = limit_and_offset.last
    case s = self.fetch(:eager_limit_strategy){(self[:model].default_eager_limit_strategy || :ruby) if offset}
    when Symbol
      s
    when true
      ds = associated_class.dataset
      if ds.supports_ordered_distinct_on? && offset.nil?
        :distinct_on
      elsif ds.supports_window_functions?
        :window_function
      else
        :ruby
      end
    else
      nil
    end
  end
end

#limit_and_offset ⇒ Object

The limit and offset for this association (returned as a two element array).

# File 'lib/sequel/model/associations.rb', line 505

def limit_and_offset
  if (v = self[:limit]).is_a?(Array)
    v
  else
    [v, nil]
  end
end

#returns_array? ⇒ Boolean

one_to_one associations return a single object, not an array

Returns:

• (Boolean)

# File 'lib/sequel/model/associations.rb', line 514

def returns_array?
  false
end