Class: ActiveRecord::Associations::HasManyAssociation

Inherits:
Object
  • Object
show all
Defined in:
lib/composite_primary_keys/associations/has_many_association.rb

Instance Method Summary collapse

Instance Method Details

#delete_records(records, method) ⇒ Object 



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# File 'lib/composite_primary_keys/associations/has_many_association.rb', line 4

def delete_records(records, method)
  if method == :destroy
    records.each { |r| r.destroy }
    update_counter(-records.length) unless inverse_updates_counter_cache?
  else
    # CPK
    # keys  = records.map { |r| r[reflection.association_primary_key] }
    # scope = scoped.where(reflection.association_primary_key => keys)
    table = Arel::Table.new(reflection.table_name)
    and_conditions = records.map do |record|
      eq_conditions = Array(reflection.association_primary_key).map do |name|
        table[name].eq(record[name])
      end
      Arel::Nodes::And.new(eq_conditions)
    end

    condition = and_conditions.shift
    and_conditions.each do |and_condition|
      condition = condition.or(and_condition)
    end

    scope = scoped.where(condition)

    if method == :delete_all
      update_counter(-scope.delete_all)
    else
      # CPK
      # update_counter(-scope.update_all(reflection.foreign_key => nil))
      updates = Array(reflection.foreign_key).inject(Hash.new) do |hash, name|
        hash[name] = nil
        hash
      end
      update_counter(-scope.update_all(updates))
    end
  end
end