# File lib/sequel/model/associations.rb 857 def primary_key 858 cached_fetch(:primary_key){associated_class.primary_key || raise(Error, "no primary key specified for #{associated_class.inspect}")} 859 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 803 def can_have_associated_objects?(obj) 804 !self[:keys].any?{|k| obj.get_column_value(k).nil?} 805 end
Whether the dataset needs a primary key to function, false for many_to_one associations.
# File lib/sequel/model/associations.rb 808 def dataset_need_primary_key? 809 false 810 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 814 def default_key 815 :"#{self[:name]}_id" 816 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 820 def eager_graph_lazy_dataset? 821 self[:key].nil? 822 end
many_to_one associations don't need an eager_graph limit strategy
# File lib/sequel/model/associations.rb 825 def eager_graph_limit_strategy(_) 826 nil 827 end
many_to_one associations don't need an eager limit strategy
# File lib/sequel/model/associations.rb 830 def eager_limit_strategy 831 nil 832 end
many_to_one associations don't need a filter by associations limit strategy
# File lib/sequel/model/associations.rb 835 def filter_by_associations_limit_strategy 836 nil 837 end
# File lib/sequel/model/associations.rb 847 def finalize_settings 848 FINALIZE_SETTINGS 849 end
The expression to use on the left hand side of the IN lookup when eager loading
# File lib/sequel/model/associations.rb 852 def predicate_key 853 cached_fetch(:predicate_key){qualified_primary_key} 854 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 869 def primary_key_method 870 cached_fetch(:primary_key_method){primary_key} 871 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 875 def primary_key_methods 876 cached_fetch(:primary_key_methods){Array(primary_key_method)} 877 end
The columns in the associated table that the key in the current table references (always an array).
# File lib/sequel/model/associations.rb 862 def primary_keys 863 cached_fetch(:primary_keys){Array(primary_key)} 864 end
primary_key
qualified by the associated table
# File lib/sequel/model/associations.rb 880 def qualified_primary_key 881 cached_fetch(:qualified_primary_key){self[:qualify] == false ? primary_key : qualify_assoc(primary_key)} 882 end
True only if the reciprocal is a one_to_many association.
# File lib/sequel/model/associations.rb 885 def reciprocal_array? 886 !set_reciprocal_to_self? 887 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 891 def returns_array? 892 false 893 end
True only if the reciprocal is a one_to_one association.
# File lib/sequel/model/associations.rb 896 def set_reciprocal_to_self? 897 reciprocal 898 reciprocal_type == :one_to_one 899 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 905 def ambiguous_reciprocal_type? 906 true 907 end
# File lib/sequel/model/associations.rb 909 def filter_by_associations_conditions_associated_keys 910 qualify(associated_class.table_name, primary_keys) 911 end
# File lib/sequel/model/associations.rb 913 def filter_by_associations_conditions_key 914 qualify(self[:model].table_name, self[:key_column]) 915 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 919 def limit_to_single_row? 920 super && self[:key] 921 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 929 def possible_reciprocal_types 930 [:one_to_many, :one_to_one] 931 end
# File lib/sequel/model/associations.rb 923 def predicate_key_methods 924 self[:keys] 925 end
Whether the given association reflection is possible reciprocal
Sequel::Model::Associations::AssociationReflection#reciprocal_association?
# File lib/sequel/model/associations.rb 934 def reciprocal_association?(assoc_reflect) 935 super && self[:keys] == assoc_reflect[:keys] && primary_key == assoc_reflect.primary_key 936 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 941 def reciprocal_type 942 cached_fetch(:reciprocal_type) do 943 possible_recips = [] 944 945 associated_class.all_association_reflections.each do |assoc_reflect| 946 if reciprocal_association?(assoc_reflect) 947 possible_recips << assoc_reflect 948 end 949 end 950 951 if possible_recips.length == 1 952 possible_recips.first[:type] 953 else 954 possible_reciprocal_types 955 end 956 end 957 end