# File lib/sequel/model/associations.rb 874 def primary_key 875 cached_fetch(:primary_key){associated_class.primary_key || raise(Error, "no primary key specified for #{associated_class.inspect}")} 876 end
class Sequel::Model::Associations::ManyToOneAssociationReflection
Constants
- FINALIZE_SETTINGS
Public Instance Methods
many_to_one associations can only have associated objects if none of the :keys options have a nil value.
# File lib/sequel/model/associations.rb 820 def can_have_associated_objects?(obj) 821 !self[:keys].any?{|k| obj.get_column_value(k).nil?} 822 end
Whether the dataset needs a primary key to function, false for many_to_one associations.
# File lib/sequel/model/associations.rb 825 def dataset_need_primary_key? 826 false 827 end
Default foreign key name symbol for foreign key in current model's table that points to the given association's table's primary key.
# File lib/sequel/model/associations.rb 831 def default_key 832 :"#{self[:name]}_id" 833 end
Whether to eagerly graph a lazy dataset, true for many_to_one associations only if the key is nil.
# File lib/sequel/model/associations.rb 837 def eager_graph_lazy_dataset? 838 self[:key].nil? 839 end
many_to_one associations don't need an eager_graph limit strategy
# File lib/sequel/model/associations.rb 842 def eager_graph_limit_strategy(_) 843 nil 844 end
many_to_one associations don't need an eager limit strategy
# File lib/sequel/model/associations.rb 847 def eager_limit_strategy 848 nil 849 end
many_to_one associations don't need a filter by associations limit strategy
# File lib/sequel/model/associations.rb 852 def filter_by_associations_limit_strategy 853 nil 854 end
# File lib/sequel/model/associations.rb 864 def finalize_settings 865 FINALIZE_SETTINGS 866 end
The expression to use on the left hand side of the IN lookup when eager loading
# File lib/sequel/model/associations.rb 869 def predicate_key 870 cached_fetch(:predicate_key){qualified_primary_key} 871 end
The column(s) in the associated table that the key in the current table references (either a symbol or an array).
The method symbol or array of method symbols to call on the associated object to get the value to use for the foreign keys.
# File lib/sequel/model/associations.rb 886 def primary_key_method 887 cached_fetch(:primary_key_method){primary_key} 888 end
The array of method symbols to call on the associated object to get the value to use for the foreign keys.
# File lib/sequel/model/associations.rb 892 def primary_key_methods 893 cached_fetch(:primary_key_methods){Array(primary_key_method)} 894 end
The columns in the associated table that the key in the current table references (always an array).
# File lib/sequel/model/associations.rb 879 def primary_keys 880 cached_fetch(:primary_keys){Array(primary_key)} 881 end
primary_key
qualified by the associated table
# File lib/sequel/model/associations.rb 897 def qualified_primary_key 898 cached_fetch(:qualified_primary_key){self[:qualify] == false ? primary_key : qualify_assoc(primary_key)} 899 end
True only if the reciprocal is a one_to_many association.
# File lib/sequel/model/associations.rb 902 def reciprocal_array? 903 !set_reciprocal_to_self? 904 end
Whether this association returns an array of objects instead of a single object, false for a many_to_one association.
# File lib/sequel/model/associations.rb 908 def returns_array? 909 false 910 end
True only if the reciprocal is a one_to_one association.
# File lib/sequel/model/associations.rb 913 def set_reciprocal_to_self? 914 reciprocal 915 reciprocal_type == :one_to_one 916 end
Private Instance Methods
Reciprocals of many_to_one associations could be either one_to_many or one_to_one, and which is not known in advance.
# File lib/sequel/model/associations.rb 922 def ambiguous_reciprocal_type? 923 true 924 end
# File lib/sequel/model/associations.rb 926 def filter_by_associations_conditions_associated_keys 927 qualify(associated_class.table_name, primary_keys) 928 end
# File lib/sequel/model/associations.rb 930 def filter_by_associations_conditions_key 931 qualify(self[:model].table_name, self[:key_column]) 932 end
many_to_one associations do not need to be limited to a single row if they explicitly do not have a key.
Sequel::Model::Associations::AssociationReflection#limit_to_single_row?
# File lib/sequel/model/associations.rb 936 def limit_to_single_row? 937 super && self[:key] 938 end
The reciprocal type of a many_to_one association is either a one_to_many or a one_to_one association.
# File lib/sequel/model/associations.rb 946 def possible_reciprocal_types 947 [:one_to_many, :one_to_one] 948 end
# File lib/sequel/model/associations.rb 940 def predicate_key_methods 941 self[:keys] 942 end
Whether the given association reflection is possible reciprocal
Sequel::Model::Associations::AssociationReflection#reciprocal_association?
# File lib/sequel/model/associations.rb 951 def reciprocal_association?(assoc_reflect) 952 super && self[:keys] == assoc_reflect[:keys] && primary_key == assoc_reflect.primary_key 953 end
The reciprocal type of a many_to_one association is either a one_to_many or a one_to_one association, look in the associated class to try to figure out which.
# File lib/sequel/model/associations.rb 958 def reciprocal_type 959 cached_fetch(:reciprocal_type) do 960 possible_recips = [] 961 962 associated_class.all_association_reflections.each do |assoc_reflect| 963 if reciprocal_association?(assoc_reflect) 964 possible_recips << assoc_reflect 965 end 966 end 967 968 if possible_recips.length == 1 969 possible_recips.first[:type] 970 else 971 possible_reciprocal_types 972 end 973 end 974 end