Module: Praxis::Mapper::IdentityMapExtensions::Persistence

Included in:
Praxis::Mapper::IdentityMap
Defined in:
lib/praxis-mapper/identity_map_extensions/persistence.rb

Instance Method Summary collapse

Instance Method Details

#attach(record) ⇒ Object

attach record to the identity map. save the record if, and only if, we need to



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# File 'lib/praxis-mapper/identity_map_extensions/persistence.rb', line 34

def attach(record)
  # save unless it has all identities populated
  unless record.identities.all? { |identity, value| value }
    record.save
  end

  # raise if still don't have full identities
  unless record.identities.all? { |identity, value| value }
    raise "can not attach #{record.inspect} without a full set of identities."
  end

  add_record(record)

  # TODO: what to do with related records?
end

#deindex(record) ⇒ Object 



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# File 'lib/praxis-mapper/identity_map_extensions/persistence.rb', line 5

def deindex(record)
  model = record.class

  # delete from full set of rows
  rows_for(model).delete record 

  # remove record from identity indexes
  @row_keys[model].each do |identity, index|
    index.delete_if {|k,v| v == record }
  end

  # remove any secondary indexes
  @secondary_indexes[model].each do |key, index|
    index.each do |index_key, indexed_values|
      indexed_values.delete record
    end
  end
end

#detach(record) ⇒ Object 



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# File 'lib/praxis-mapper/identity_map_extensions/persistence.rb', line 75

def detach(record)
  record.identity_map = nil
  deindex(record)
end

#flush!(object = nil) ⇒ Object 



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# File 'lib/praxis-mapper/identity_map_extensions/persistence.rb', line 50

def flush!(object=nil)
  if object.nil?
    return @rows.keys.each { |klass| self.flush!(klass) }
  end

  case object
  when Class
    @rows[object].select(&:modified?).each do |record|
      record.save
      reindex(record)
    end
  when Sequel::Model
    if object.modified?
      object.save
      reindex(object)
    end
  end
end

#reindex(record) ⇒ Object 



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# File 'lib/praxis-mapper/identity_map_extensions/persistence.rb', line 24

def reindex(record)
  # fully remove the record from any indexes it may be part of
  deindex(record)

  # hack to update any indexes as applicable
  add_record(record)
end

#remove(record) ⇒ Object 



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# File 'lib/praxis-mapper/identity_map_extensions/persistence.rb', line 69

def remove(record)
  detach(record)

  record.delete
end