Class | Sequel::Model::Associations::ManyToOneAssociationReflection
In: | lib/sequel/model/associations.rb
Parent: | AssociationReflection

### Methods

associated_object_keys can_have_associated_objects? dataset_need_primary_key? default_key eager_graph_lazy_dataset? eager_limit_strategy eager_loader_key primary_key primary_key_method primary_key_methods primary_keys qualified_primary_key reciprocal_array? returns_array? set_reciprocal_to_self?

### Public Instance methods

associated_object_keys()

Alias for primary_keys

can_have_associated_objects?(obj)

many_to_one associations can only have associated objects if none of the :keys options have a nil value.

[Source]

         # File lib/sequel/model/associations.rb, line 229
    229:         def can_have_associated_objects?(obj)
    230:           !self[:keys].any?{|k| obj.send(k).nil?}
    231:         end

dataset_need_primary_key?()

Whether the dataset needs a primary key to function, false for many_to_one associations.

[Source]

         # File lib/sequel/model/associations.rb, line 234
    234:         def dataset_need_primary_key?
    235:           false
    236:         end

default_key()

Default foreign key name symbol for foreign key in current model‘s table that points to the given association‘s table‘s primary key.

[Source]

         # File lib/sequel/model/associations.rb, line 240
    240:         def default_key
    241:
    242:           "#{self[:name]}_id"
    243:         end

eager_graph_lazy_dataset?()

Whether to eagerly graph a lazy dataset, true for many_to_one associations only if the key is nil.

[Source]

         # File lib/sequel/model/associations.rb, line 246
    246:         def eager_graph_lazy_dataset?
    247:           self[:key].nil?
    248:         end

eager_limit_strategy()

many_to_one associations don‘t need an eager limit strategy

[Source]

         # File lib/sequel/model/associations.rb, line 251
    251:         def eager_limit_strategy
    252:           nil
    253:         end

eager_loader_key()

The key to use for the key hash when eager loading

[Source]

         # File lib/sequel/model/associations.rb, line 256
    256:         def eager_loader_key
    257:           self[:eager_loader_key] ||= self[:key]
    258:         end

primary_key()

The column(s) in the associated table that the key in the current table references (either a symbol or an array).

[Source]

         # File lib/sequel/model/associations.rb, line 261
    261:         def primary_key
    262:          self[:primary_key] ||= associated_class.primary_key
    263:         end

primary_key_method()

The method symbol or array of method symbols to call on the associated object to get the value to use for the foreign keys.

[Source]

         # File lib/sequel/model/associations.rb, line 273
    273:         def primary_key_method
    274:          self[:primary_key_method] ||= primary_key
    275:         end

primary_key_methods()

The array of method symbols to call on the associated object to get the value to use for the foreign keys.

[Source]

         # File lib/sequel/model/associations.rb, line 279
    279:         def primary_key_methods
    280:          self[:primary_key_methods] ||= Array(primary_key_method)
    281:         end

primary_keys()

The columns in the associated table that the key in the current table references (always an array).

[Source]

         # File lib/sequel/model/associations.rb, line 266
    266:         def primary_keys
    267:          self[:primary_keys] ||= Array(primary_key)
    268:         end

qualified_primary_key()

primary_key qualified by the associated table

[Source]

         # File lib/sequel/model/associations.rb, line 284
    284:         def qualified_primary_key
    285:           self[:qualified_primary_key] ||= self[:qualify] == false ? primary_key : qualify_assoc(primary_key)
    286:         end

reciprocal_array?()

True only if the reciprocal is a one_to_many association.

[Source]

         # File lib/sequel/model/associations.rb, line 289
    289:         def reciprocal_array?
    290:           !set_reciprocal_to_self?
    291:         end

returns_array?()

Whether this association returns an array of objects instead of a single object, false for a many_to_one association.

[Source]

         # File lib/sequel/model/associations.rb, line 295
    295:         def returns_array?
    296:           false
    297:         end

set_reciprocal_to_self?()

True only if the reciprocal is a one_to_one association.

[Source]

         # File lib/sequel/model/associations.rb, line 300
    300:         def set_reciprocal_to_self?
    301:           reciprocal
    302:           self[:reciprocal_type] == :one_to_one
    303:         end

[Validate]