Module: Foreigner::ConnectionAdapters::Sql2003

Included in:
MysqlAdapter, PostgreSQLAdapter, SQLite3Adapter
Defined in:
lib/foreigner/connection_adapters/sql_2003.rb

Instance Method Summary collapse

Instance Method Details

#add_foreign_key(from_table, to_table, options = {}) ⇒ Object 



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# File 'lib/foreigner/connection_adapters/sql_2003.rb', line 17

def add_foreign_key(from_table, to_table, options = {})
  column  = options[:column] || "#{to_table.to_s.singularize}_id"
  foreign_key_name = foreign_key_name(from_table, column, options)
  primary_key = options[:primary_key] || "id"
  dependency = dependency_sql(options[:dependent])

  sql =
    "ALTER TABLE #{quote_table_name(from_table)} " +
    "ADD CONSTRAINT #{quote_column_name(foreign_key_name)} " +
    "FOREIGN KEY (#{quote_column_name(column)}) " +
    "REFERENCES #{quote_table_name(ActiveRecord::Migrator.proper_table_name(to_table))}(#{primary_key})"

  sql << " #{dependency}" unless dependency.blank?

  execute(sql)
end

#foreign_key_definition(to_table, options = {}) ⇒ Object 



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# File 'lib/foreigner/connection_adapters/sql_2003.rb', line 8

def foreign_key_definition(to_table, options = {})
  column  = options[:column] || "#{to_table.to_s.singularize}_id"
  dependency = dependency_sql(options[:dependent])

  sql = "FOREIGN KEY (#{quote_column_name(column)}) REFERENCES #{quote_table_name(to_table)}(id)"
  sql << " #{dependency}" unless dependency.blank?
  sql
end

#supports_foreign_keys? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/foreigner/connection_adapters/sql_2003.rb', line 4

def supports_foreign_keys?
  true
end