Class: Ramen::Metadata::Column

Inherits:
RowDataGateway show all
Defined in:
lib/ramen/metadata/column.rb

Overview

Column contains meta-data about columns within a Table. The attributes are database engine specific. Only column_name and column_id are required by Ramen. See RowDataGateway for more information.

See Database for a description of how Column fits in the Ramen collection hierarchy.

Links: readme.txt; source

Instance Method Summary collapse

Methods inherited from RowDataGateway

add_attributes, compare, #initialize

Constructor Details

This class inherits a constructor from Ramen::RowDataGateway

Instance Method Details

#<=>(other) ⇒ Object

Comparison, returns -1,0,+1, compares column_name



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# File 'lib/ramen/metadata/column.rb', line 22

def <=> other
  Ramen::RowDataGateway.compare( column_name, other )
end

#add_to(database) ⇒ Object

add_to( database )

Add self to the given database. (Choosing Message; Double Dispatch pattern) (Kent Beck. Smalltalk Best Practices Patterns. Perntice Hall PTR, Upper Saddle River, NJ 1997)



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# File 'lib/ramen/metadata/column.rb', line 34

def add_to( database )
  database.schema[ self.table_schema ].table[ self.table_name ].add_column( self )
end