# File lib/sequel/model/associations.rb 987 def primary_key 988 cached_fetch(:primary_key){associated_class.primary_key || raise(Error, "no primary key specified for #{associated_class.inspect}")} 989 end
class Sequel::Model::Associations::ManyToOneAssociationReflection
Constants
- FINALIZE_SETTINGS
Public Instance Methods
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# File lib/sequel/model/associations.rb 933 def can_have_associated_objects?(obj) 934 !self[:keys].any?{|k| obj.get_column_value(k).nil?} 935 end
many_to_one associations can only have associated objects if none of the :keys options have a nil value.
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# File lib/sequel/model/associations.rb 938 def dataset_need_primary_key? 939 false 940 end
Whether the dataset needs a primary key to function, false for many_to_one associations.
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# File lib/sequel/model/associations.rb 944 def default_key 945 :"#{self[:name]}_id" 946 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.
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# File lib/sequel/model/associations.rb 950 def eager_graph_lazy_dataset? 951 self[:key].nil? 952 end
Whether to eagerly graph a lazy dataset, true for many_to_one associations only if the key is nil.
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# File lib/sequel/model/associations.rb 955 def eager_graph_limit_strategy(_) 956 nil 957 end
many_to_one associations don’t need an eager_graph limit strategy
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# File lib/sequel/model/associations.rb 960 def eager_limit_strategy 961 nil 962 end
many_to_one associations don’t need an eager limit strategy
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# File lib/sequel/model/associations.rb 965 def filter_by_associations_limit_strategy 966 nil 967 end
many_to_one associations don’t need a filter by associations limit strategy
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# File lib/sequel/model/associations.rb 977 def finalize_settings 978 FINALIZE_SETTINGS 979 end
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# File lib/sequel/model/associations.rb 982 def predicate_key 983 cached_fetch(:predicate_key){qualified_primary_key} 984 end
The expression to use on the left hand side of the IN lookup when eager loading
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The column(s) in the associated table that the key in the current table references (either a symbol or an array).
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# File lib/sequel/model/associations.rb 999 def primary_key_method 1000 cached_fetch(:primary_key_method){primary_key} 1001 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.
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# File lib/sequel/model/associations.rb 1005 def primary_key_methods 1006 cached_fetch(:primary_key_methods){Array(primary_key_method)} 1007 end
The array of method symbols to call on the associated object to get the value to use for the foreign keys.
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# File lib/sequel/model/associations.rb 992 def primary_keys 993 cached_fetch(:primary_keys){Array(primary_key)} 994 end
The columns in the associated table that the key in the current table references (always an array).
Also aliased as: associated_object_keys
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# File lib/sequel/model/associations.rb 1010 def qualified_primary_key 1011 cached_fetch(:qualified_primary_key){self[:qualify] == false ? primary_key : qualify_assoc(primary_key)} 1012 end
primary_key qualified by the associated table
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# File lib/sequel/model/associations.rb 1015 def reciprocal_array? 1016 !set_reciprocal_to_self? 1017 end
True only if the reciprocal is a one_to_many association.
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# File lib/sequel/model/associations.rb 1021 def returns_array? 1022 false 1023 end
Whether this association returns an array of objects instead of a single object, false for a many_to_one association.
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# File lib/sequel/model/associations.rb 1026 def set_reciprocal_to_self? 1027 reciprocal 1028 reciprocal_type == :one_to_one 1029 end
True only if the reciprocal is a one_to_one association.
Private Instance Methods
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# File lib/sequel/model/associations.rb 1035 def ambiguous_reciprocal_type? 1036 true 1037 end
Reciprocals of many_to_one associations could be either one_to_many or one_to_one, and which is not known in advance.
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# File lib/sequel/model/associations.rb 1039 def filter_by_associations_conditions_associated_keys 1040 qualify(associated_class.table_name, primary_keys) 1041 end
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# File lib/sequel/model/associations.rb 1043 def filter_by_associations_conditions_key 1044 qualify(self[:model].table_name, self[:key_column]) 1045 end
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# File lib/sequel/model/associations.rb 1049 def limit_to_single_row? 1050 super && self[:key] 1051 end
many_to_one associations do not need to be limited to a single row if they explicitly do not have a key.
Calls superclass method
Sequel::Model::Associations::AssociationReflection#limit_to_single_row?
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# File lib/sequel/model/associations.rb 1059 def possible_reciprocal_types 1060 [:one_to_many, :one_to_one] 1061 end
The reciprocal type of a many_to_one association is either a one_to_many or a one_to_one association.
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# File lib/sequel/model/associations.rb 1053 def predicate_key_methods 1054 self[:keys] 1055 end
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# File lib/sequel/model/associations.rb 1064 def reciprocal_association?(assoc_reflect) 1065 super && self[:keys] == assoc_reflect[:keys] && primary_key == assoc_reflect.primary_key 1066 end
Whether the given association reflection is possible reciprocal
Calls superclass method
Sequel::Model::Associations::AssociationReflection#reciprocal_association?
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# File lib/sequel/model/associations.rb 1071 def reciprocal_type 1072 cached_fetch(:reciprocal_type) do 1073 possible_recips = [] 1074 1075 associated_class.all_association_reflections.each do |assoc_reflect| 1076 if reciprocal_association?(assoc_reflect) 1077 possible_recips << assoc_reflect 1078 end 1079 end 1080 1081 if possible_recips.length == 1 1082 possible_recips.first[:type] 1083 else 1084 possible_reciprocal_types 1085 end 1086 end 1087 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.