# File lib/sequel/model/associations.rb, line 857 def primary_key cached_fetch(:primary_key){associated_class.primary_key || raise(Error, "no primary key specified for #{associated_class.inspect}")} end
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, line 803 def can_have_associated_objects?(obj) !self[:keys].any?{|k| obj.get_column_value(k).nil?} end
Whether the dataset needs a primary key to function, false for many_to_one associations.
# File lib/sequel/model/associations.rb, line 808 def dataset_need_primary_key? false 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, line 814 def default_key :"#{self[:name]}_id" 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, line 820 def eager_graph_lazy_dataset? self[:key].nil? end
many_to_one associations don't need an eager_graph limit strategy
# File lib/sequel/model/associations.rb, line 825 def eager_graph_limit_strategy(_) nil end
many_to_one associations don't need an eager limit strategy
# File lib/sequel/model/associations.rb, line 830 def eager_limit_strategy nil end
many_to_one associations don't need a filter by associations limit strategy
# File lib/sequel/model/associations.rb, line 835 def filter_by_associations_limit_strategy nil end
# File lib/sequel/model/associations.rb, line 847 def finalize_settings FINALIZE_SETTINGS end
The expression to use on the left hand side of the IN lookup when eager loading
# File lib/sequel/model/associations.rb, line 852 def predicate_key cached_fetch(:predicate_key){qualified_primary_key} end
The column(s) in the associated table that the key in the current table references (either a symbol or an array).
# File lib/sequel/model/associations.rb, line 857 def primary_key cached_fetch(:primary_key){associated_class.primary_key || raise(Error, "no primary key specified for #{associated_class.inspect}")} end
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, line 869 def primary_key_method cached_fetch(:primary_key_method){primary_key} 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, line 875 def primary_key_methods cached_fetch(:primary_key_methods){Array(primary_key_method)} end
The columns in the associated table that the key in the current table references (always an array).
# File lib/sequel/model/associations.rb, line 862 def primary_keys cached_fetch(:primary_keys){Array(primary_key)} end
#primary_key qualified by the associated table
# File lib/sequel/model/associations.rb, line 880 def qualified_primary_key cached_fetch(:qualified_primary_key){self[:qualify] == false ? primary_key : qualify_assoc(primary_key)} end
True only if the reciprocal is a one_to_many association.
# File lib/sequel/model/associations.rb, line 885 def reciprocal_array? !set_reciprocal_to_self? 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, line 891 def returns_array? false end
True only if the reciprocal is a one_to_one association.
# File lib/sequel/model/associations.rb, line 896 def set_reciprocal_to_self? reciprocal reciprocal_type == :one_to_one end
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, line 905 def ambiguous_reciprocal_type? true end
# File lib/sequel/model/associations.rb, line 909 def filter_by_associations_conditions_associated_keys qualify(associated_class.table_name, primary_keys) end
# File lib/sequel/model/associations.rb, line 913 def filter_by_associations_conditions_key qualify(self[:model].table_name, self[:key_column]) end
many_to_one associations do not need to be limited to a single row if they explicitly do not have a key.
# File lib/sequel/model/associations.rb, line 919 def limit_to_single_row? super && self[:key] 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, line 929 def possible_reciprocal_types [:one_to_many, :one_to_one] end
# File lib/sequel/model/associations.rb, line 923 def predicate_key_methods self[:keys] end
Whether the given association reflection is possible reciprocal
# File lib/sequel/model/associations.rb, line 934 def reciprocal_association?(assoc_reflect) super && self[:keys] == assoc_reflect[:keys] && primary_key == assoc_reflect.primary_key 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, line 941 def reciprocal_type cached_fetch(:reciprocal_type) do possible_recips = [] associated_class.all_association_reflections.each do |assoc_reflect| if reciprocal_association?(assoc_reflect) possible_recips << assoc_reflect end end if possible_recips.length == 1 possible_recips.first[:type] else possible_reciprocal_types end end end