Class: ActiveRecord::Associations::Preloader::Association
- Inherits:
-
Object
- Object
- ActiveRecord::Associations::Preloader::Association
- Defined in:
- lib/composite_primary_keys/associations/preloader/association.rb
Instance Method Summary collapse
Instance Method Details
#associated_records_by_owner ⇒ Object
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# File 'lib/composite_primary_keys/associations/preloader/association.rb', line 12 def associated_records_by_owner # CPK owners_map = owners_by_key #owner_keys = owners_map.keys.compact owner_keys = owners.map do |owner| Array(owner_key_name).map do |owner_key| owner[owner_key] end end.compact.uniq if klass.nil? || owner_keys.empty? records = [] else # Some databases impose a limit on the number of ids in a list (in Oracle it's 1000) # Make several smaller queries if necessary or make one query if the adapter supports it sliced = owner_keys.each_slice(model.connection.in_clause_length || owner_keys.size) records = sliced.map { |slice| records_for(slice) }.flatten end # Each record may have multiple owners, and vice-versa records_by_owner = Hash[owners.map { |owner| [owner, []] }] records.each do |record| # CPK # owner_key = record[association_key_name].to_s owner_key = Array(association_key_name).map do |key_name| record[key_name] end.join(CompositePrimaryKeys::ID_SEP) owners_map[owner_key].each do |owner| records_by_owner[owner] << record end end records_by_owner end |
#owners_by_key ⇒ Object
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# File 'lib/composite_primary_keys/associations/preloader/association.rb', line 47 def owners_by_key @owners_by_key ||= owners.group_by do |owner| # CPK # key = owner[owner_key_name] key = Array(owner_key_name).map do |key_name| owner[key_name] end # CPK # key && key.to_s key && key.join(CompositePrimaryKeys::ID_SEP) end end |
#records_for(ids) ⇒ Object
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# File 'lib/composite_primary_keys/associations/preloader/association.rb', line 5 def records_for(ids) # CPK # scoped.where(association_key.in(ids)) predicate = cpk_in_predicate(table, reflection.foreign_key, ids) scoped.where(predicate) end |