# File lib/sequel/model/associations.rb 883 def primary_key 884 cached_fetch(:primary_key){associated_class.primary_key || raise(Error, "no primary key specified for #{associated_class.inspect}")} 885 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 829 def can_have_associated_objects?(obj) 830 !self[:keys].any?{|k| obj.get_column_value(k).nil?} 831 end
Whether the dataset needs a primary key to function, false for many_to_one associations.
# File lib/sequel/model/associations.rb 834 def dataset_need_primary_key? 835 false 836 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 840 def default_key 841 :"#{self[:name]}_id" 842 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 846 def eager_graph_lazy_dataset? 847 self[:key].nil? 848 end
many_to_one associations don’t need an eager_graph limit strategy
# File lib/sequel/model/associations.rb 851 def eager_graph_limit_strategy(_) 852 nil 853 end
many_to_one associations don’t need an eager limit strategy
# File lib/sequel/model/associations.rb 856 def eager_limit_strategy 857 nil 858 end
many_to_one associations don’t need a filter by associations limit strategy
# File lib/sequel/model/associations.rb 861 def filter_by_associations_limit_strategy 862 nil 863 end
# File lib/sequel/model/associations.rb 873 def finalize_settings 874 FINALIZE_SETTINGS 875 end
The expression to use on the left hand side of the IN lookup when eager loading
# File lib/sequel/model/associations.rb 878 def predicate_key 879 cached_fetch(:predicate_key){qualified_primary_key} 880 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 895 def primary_key_method 896 cached_fetch(:primary_key_method){primary_key} 897 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 901 def primary_key_methods 902 cached_fetch(:primary_key_methods){Array(primary_key_method)} 903 end
The columns in the associated table that the key in the current table references (always an array).
# File lib/sequel/model/associations.rb 888 def primary_keys 889 cached_fetch(:primary_keys){Array(primary_key)} 890 end
primary_key
qualified by the associated table
# File lib/sequel/model/associations.rb 906 def qualified_primary_key 907 cached_fetch(:qualified_primary_key){self[:qualify] == false ? primary_key : qualify_assoc(primary_key)} 908 end
True only if the reciprocal is a one_to_many association.
# File lib/sequel/model/associations.rb 911 def reciprocal_array? 912 !set_reciprocal_to_self? 913 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 917 def returns_array? 918 false 919 end
True only if the reciprocal is a one_to_one association.
# File lib/sequel/model/associations.rb 922 def set_reciprocal_to_self? 923 reciprocal 924 reciprocal_type == :one_to_one 925 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 931 def ambiguous_reciprocal_type? 932 true 933 end
# File lib/sequel/model/associations.rb 935 def filter_by_associations_conditions_associated_keys 936 qualify(associated_class.table_name, primary_keys) 937 end
# File lib/sequel/model/associations.rb 939 def filter_by_associations_conditions_key 940 qualify(self[:model].table_name, self[:key_column]) 941 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 945 def limit_to_single_row? 946 super && self[:key] 947 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 955 def possible_reciprocal_types 956 [:one_to_many, :one_to_one] 957 end
# File lib/sequel/model/associations.rb 949 def predicate_key_methods 950 self[:keys] 951 end
Whether the given association reflection is possible reciprocal
Sequel::Model::Associations::AssociationReflection#reciprocal_association?
# File lib/sequel/model/associations.rb 960 def reciprocal_association?(assoc_reflect) 961 super && self[:keys] == assoc_reflect[:keys] && primary_key == assoc_reflect.primary_key 962 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 967 def reciprocal_type 968 cached_fetch(:reciprocal_type) do 969 possible_recips = [] 970 971 associated_class.all_association_reflections.each do |assoc_reflect| 972 if reciprocal_association?(assoc_reflect) 973 possible_recips << assoc_reflect 974 end 975 end 976 977 if possible_recips.length == 1 978 possible_recips.first[:type] 979 else 980 possible_reciprocal_types 981 end 982 end 983 end