# File lib/sequel/model/associations.rb 909 def primary_key 910 cached_fetch(:primary_key){associated_class.primary_key || raise(Error, "no primary key specified for #{associated_class.inspect}")} 911 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 855 def can_have_associated_objects?(obj) 856 !self[:keys].any?{|k| obj.get_column_value(k).nil?} 857 end
Whether the dataset needs a primary key to function, false for many_to_one associations.
# File lib/sequel/model/associations.rb 860 def dataset_need_primary_key? 861 false 862 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 866 def default_key 867 :"#{self[:name]}_id" 868 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 872 def eager_graph_lazy_dataset? 873 self[:key].nil? 874 end
many_to_one associations don’t need an eager_graph limit strategy
# File lib/sequel/model/associations.rb 877 def eager_graph_limit_strategy(_) 878 nil 879 end
many_to_one associations don’t need an eager limit strategy
# File lib/sequel/model/associations.rb 882 def eager_limit_strategy 883 nil 884 end
many_to_one associations don’t need a filter by associations limit strategy
# File lib/sequel/model/associations.rb 887 def filter_by_associations_limit_strategy 888 nil 889 end
# File lib/sequel/model/associations.rb 899 def finalize_settings 900 FINALIZE_SETTINGS 901 end
The expression to use on the left hand side of the IN lookup when eager loading
# File lib/sequel/model/associations.rb 904 def predicate_key 905 cached_fetch(:predicate_key){qualified_primary_key} 906 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 921 def primary_key_method 922 cached_fetch(:primary_key_method){primary_key} 923 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 927 def primary_key_methods 928 cached_fetch(:primary_key_methods){Array(primary_key_method)} 929 end
The columns in the associated table that the key in the current table references (always an array).
# File lib/sequel/model/associations.rb 914 def primary_keys 915 cached_fetch(:primary_keys){Array(primary_key)} 916 end
primary_key
qualified by the associated table
# File lib/sequel/model/associations.rb 932 def qualified_primary_key 933 cached_fetch(:qualified_primary_key){self[:qualify] == false ? primary_key : qualify_assoc(primary_key)} 934 end
True only if the reciprocal is a one_to_many association.
# File lib/sequel/model/associations.rb 937 def reciprocal_array? 938 !set_reciprocal_to_self? 939 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 943 def returns_array? 944 false 945 end
True only if the reciprocal is a one_to_one association.
# File lib/sequel/model/associations.rb 948 def set_reciprocal_to_self? 949 reciprocal 950 reciprocal_type == :one_to_one 951 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 957 def ambiguous_reciprocal_type? 958 true 959 end
# File lib/sequel/model/associations.rb 961 def filter_by_associations_conditions_associated_keys 962 qualify(associated_class.table_name, primary_keys) 963 end
# File lib/sequel/model/associations.rb 965 def filter_by_associations_conditions_key 966 qualify(self[:model].table_name, self[:key_column]) 967 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 971 def limit_to_single_row? 972 super && self[:key] 973 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 981 def possible_reciprocal_types 982 [:one_to_many, :one_to_one] 983 end
# File lib/sequel/model/associations.rb 975 def predicate_key_methods 976 self[:keys] 977 end
Whether the given association reflection is possible reciprocal
Sequel::Model::Associations::AssociationReflection#reciprocal_association?
# File lib/sequel/model/associations.rb 986 def reciprocal_association?(assoc_reflect) 987 super && self[:keys] == assoc_reflect[:keys] && primary_key == assoc_reflect.primary_key 988 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 993 def reciprocal_type 994 cached_fetch(:reciprocal_type) do 995 possible_recips = [] 996 997 associated_class.all_association_reflections.each do |assoc_reflect| 998 if reciprocal_association?(assoc_reflect) 999 possible_recips << assoc_reflect 1000 end 1001 end 1002 1003 if possible_recips.length == 1 1004 possible_recips.first[:type] 1005 else 1006 possible_reciprocal_types 1007 end 1008 end 1009 end