Class: Lore::Table_Insert

Inherits:
Object show all
Defined in:
lib/lore/strategies/table_insert.rb

Instance Method Summary collapse

Constructor Details

#initialize(accessor) ⇒ Table_Insert

Returns a new instance of Table_Insert.



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# File 'lib/lore/strategies/table_insert.rb', line 8

def initialize(accessor)
  @accessor        = accessor
  @aggregates      = accessor.__associations__.aggregate_klasses
  @is_a            = accessor.__associations__.base_klasses_tree
  @foreign_keys    = accessor.__associations__.foreign_keys
  @base_table      = accessor.table_name
  @fields          = accessor.__attributes__.fields
  @sequences       = accessor.__attributes__.sequences
  @sequence_values = {}
end

Instance Method Details

#perform_insert(value_keys) ⇒ Object 



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# File 'lib/lore/strategies/table_insert.rb', line 19

def perform_insert(value_keys)
# {{{
  @aggregates.keys.each { |table|
    @is_a.delete(table)
  }
  
  Context.enter(@accessor.get_context) if @accessor.get_context
  Lore.logger.info { 'PERFORM INSERT on '+@accessor.to_s }

  @sequence_values = load_sequence_values(@sequences)
  
  # Parse sequence_values into value_keys where entries match the exact table: 
  # (thus, there is an explicit call like primary_key :this_field, :this_sequence)
  @sequence_values.each_pair { |table, fields|
    value_keys[table].update(@sequence_values[table])
  }
  # Parse sequence_values into value_keys where a table depends from a 
  # sequence field by IS_A
  value_keys 	 = update_sequence_values_deps(@base_table, 
                                             @is_a, 
                                             value_keys)
  query_string = insert_query(@base_table, 
                              @is_a, 
                              value_keys)
  
  begin
    Lore::Connection.perform("BEGIN;\n#{query_string}\nCOMMIT;")
  rescue ::Exception => excep
    Lore::Connection.perform("ROLLBACK;")
    raise excep
  ensure
    Lore::Context.leave if @accessor.get_context
  end
  @accessor.flush_entity_cache()

  # value_keys now are extended by sequence values: 
  return value_keys
end