Class: Sequel::Plugins::PgArrayAssociations::PgArrayToManyAssociationReflection

Inherits:
Model::Associations::AssociationReflection show all
Defined in:
lib/sequel/plugins/pg_array_associations.rb

Overview

The AssociationReflection subclass for pg_array_to_many associations.

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 collapse

Methods inherited from Model::Associations::AssociationReflection

#_add_method, #_remove_all_method, #_remove_method, #_setter_method, #add_method, #apply_dataset_changes, #associated_class, #associated_dataset, #association_method, #dataset_method, #eager_graph_lazy_dataset?, #eager_limit_strategy, #eager_loader_key, #eager_loading_predicate_key, #eager_loading_use_associated_key?, #filter_by_associations_add_conditions?, #limit_and_offset, #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?, #returns_array?, #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

#associated_object_keys ⇒ Object

An array containing the primary key for the associated model.



140
141
142
 
# File 'lib/sequel/plugins/pg_array_associations.rb', line 140

def associated_object_keys
  Array(primary_key)
end

#can_have_associated_objects?(obj) ⇒ Boolean

pg_array_to_many associations can only have associated objects if the array field is not nil or empty.

Returns:

  • (Boolean) 


146
147
148
149
 
# File 'lib/sequel/plugins/pg_array_associations.rb', line 146

def can_have_associated_objects?(obj)
  v = obj.send(self[:key])
  v && !v.empty?
end

#dataset_need_primary_key? ⇒ Boolean

pg_array_to_many associations do not need a primary key.

Returns:

  • (Boolean) 


152
153
154
 
# File 'lib/sequel/plugins/pg_array_associations.rb', line 152

def dataset_need_primary_key?
  false
end

#default_key ⇒ Object

Use a default key name of *_ids, for similarity to other association types that use *_id for single keys.



158
159
160
 
# File 'lib/sequel/plugins/pg_array_associations.rb', line 158

def default_key
  :"#{singularize(self[:name])}_ids"
end

#filter_by_associations_conditions_expression(obj) ⇒ Object 



177
178
179
180
 
# File 'lib/sequel/plugins/pg_array_associations.rb', line 177

def filter_by_associations_conditions_expression(obj)
  ds = filter_by_associations_conditions_dataset.where(filter_by_associations_conditions_subquery_conditions(obj))
  Sequel.function(:coalesce, Sequel.pg_array(filter_by_associations_conditions_key).overlaps(ds), Sequel::SQL::Constants::FALSE)
end

#predicate_key ⇒ Object

A qualified version of the associated primary key.



163
164
165
 
# File 'lib/sequel/plugins/pg_array_associations.rb', line 163

def predicate_key
  cached_fetch(:predicate_key){qualify_assoc(primary_key)}
end

#primary_key ⇒ Object

The primary key of the associated model.



168
169
170
 
# File 'lib/sequel/plugins/pg_array_associations.rb', line 168

def primary_key
  cached_fetch(:primary_key){associated_class.primary_key}
end

#primary_key_method ⇒ Object

The method to call to get value of the primary key of the associated model.



173
174
175
 
# File 'lib/sequel/plugins/pg_array_associations.rb', line 173

def primary_key_method
  cached_fetch(:primary_key_method){primary_key}
end