class SequelMapper::ManyToOneAssociation
Attributes
foreign_key[R]
key[R]
mapping_name[R]
proxy_factory[R]
Public Class Methods
new(mapping_name:, foreign_key:, key:, proxy_factory:)
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# File lib/sequel_mapper/many_to_one_association.rb, line 5 def initialize(mapping_name:, foreign_key:, key:, proxy_factory:) @mapping_name = mapping_name @foreign_key = foreign_key @key = key @proxy_factory = proxy_factory end
Public Instance Methods
build_proxy(data_superset:, loader:, record:)
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# File lib/sequel_mapper/many_to_one_association.rb, line 17 def build_proxy(data_superset:, loader:, record:) proxy_factory.call( query: build_query(data_superset, record), loader: loader, preloaded_data: { key => foreign_key_value(record), }, ) end
build_query(superset, record)
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# File lib/sequel_mapper/many_to_one_association.rb, line 33 def build_query(superset, record) superset.where(key => foreign_key_value(record)) end
dump(parent_record, collection, &block)
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# File lib/sequel_mapper/many_to_one_association.rb, line 37 def dump(parent_record, collection, &block) collection.flat_map { |object| block.call(mapping_name, object, _foreign_key_does_not_go_here = {}) .flat_map { |associated_record| foreign_key_pair = { foreign_key => associated_record.fetch(key), } [ associated_record, parent_record.merge(foreign_key_pair), ] } } end
Also aliased as: delete
eager_superset(superset, associated_dataset)
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# File lib/sequel_mapper/many_to_one_association.rb, line 27 def eager_superset(superset, associated_dataset) Dataset.new( superset.where(key => associated_dataset.select(foreign_key)).to_a ) end
Private Instance Methods
foreign_key_value(record)
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# File lib/sequel_mapper/many_to_one_association.rb, line 56 def foreign_key_value(record) record.fetch(foreign_key) end