# File lib/sequel/model/associations.rb 871 def primary_key 872 cached_fetch(:primary_key){associated_class.primary_key || raise(Error, "no primary key specified for #{associated_class.inspect}")} 873 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 817 def can_have_associated_objects?(obj) 818 !self[:keys].any?{|k| obj.get_column_value(k).nil?} 819 end
Whether the dataset needs a primary key to function, false for many_to_one associations.
# File lib/sequel/model/associations.rb 822 def dataset_need_primary_key? 823 false 824 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 828 def default_key 829 :"#{self[:name]}_id" 830 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 834 def eager_graph_lazy_dataset? 835 self[:key].nil? 836 end
many_to_one associations don't need an eager_graph limit strategy
# File lib/sequel/model/associations.rb 839 def eager_graph_limit_strategy(_) 840 nil 841 end
many_to_one associations don't need an eager limit strategy
# File lib/sequel/model/associations.rb 844 def eager_limit_strategy 845 nil 846 end
many_to_one associations don't need a filter by associations limit strategy
# File lib/sequel/model/associations.rb 849 def filter_by_associations_limit_strategy 850 nil 851 end
# File lib/sequel/model/associations.rb 861 def finalize_settings 862 FINALIZE_SETTINGS 863 end
The expression to use on the left hand side of the IN lookup when eager loading
# File lib/sequel/model/associations.rb 866 def predicate_key 867 cached_fetch(:predicate_key){qualified_primary_key} 868 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 883 def primary_key_method 884 cached_fetch(:primary_key_method){primary_key} 885 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 889 def primary_key_methods 890 cached_fetch(:primary_key_methods){Array(primary_key_method)} 891 end
The columns in the associated table that the key in the current table references (always an array).
# File lib/sequel/model/associations.rb 876 def primary_keys 877 cached_fetch(:primary_keys){Array(primary_key)} 878 end
primary_key
qualified by the associated table
# File lib/sequel/model/associations.rb 894 def qualified_primary_key 895 cached_fetch(:qualified_primary_key){self[:qualify] == false ? primary_key : qualify_assoc(primary_key)} 896 end
True only if the reciprocal is a one_to_many association.
# File lib/sequel/model/associations.rb 899 def reciprocal_array? 900 !set_reciprocal_to_self? 901 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 905 def returns_array? 906 false 907 end
True only if the reciprocal is a one_to_one association.
# File lib/sequel/model/associations.rb 910 def set_reciprocal_to_self? 911 reciprocal 912 reciprocal_type == :one_to_one 913 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 919 def ambiguous_reciprocal_type? 920 true 921 end
# File lib/sequel/model/associations.rb 923 def filter_by_associations_conditions_associated_keys 924 qualify(associated_class.table_name, primary_keys) 925 end
# File lib/sequel/model/associations.rb 927 def filter_by_associations_conditions_key 928 qualify(self[:model].table_name, self[:key_column]) 929 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 933 def limit_to_single_row? 934 super && self[:key] 935 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 943 def possible_reciprocal_types 944 [:one_to_many, :one_to_one] 945 end
# File lib/sequel/model/associations.rb 937 def predicate_key_methods 938 self[:keys] 939 end
Whether the given association reflection is possible reciprocal
Sequel::Model::Associations::AssociationReflection#reciprocal_association?
# File lib/sequel/model/associations.rb 948 def reciprocal_association?(assoc_reflect) 949 super && self[:keys] == assoc_reflect[:keys] && primary_key == assoc_reflect.primary_key 950 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 955 def reciprocal_type 956 cached_fetch(:reciprocal_type) do 957 possible_recips = [] 958 959 associated_class.all_association_reflections.each do |assoc_reflect| 960 if reciprocal_association?(assoc_reflect) 961 possible_recips << assoc_reflect 962 end 963 end 964 965 if possible_recips.length == 1 966 possible_recips.first[:type] 967 else 968 possible_reciprocal_types 969 end 970 end 971 end