Module: Foreigner::ConnectionAdapters::Sql2003

Included in:
MysqlAdapter, PostgreSQLAdapter
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 



8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
# File 'lib/foreigner/connection_adapters/sql_2003.rb', line 8

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}" if dependency.present?

  execute(sql)
end

#supports_foreign_keys? ⇒ Boolean

Returns:

  • (Boolean) 


4
5
6
 
# File 'lib/foreigner/connection_adapters/sql_2003.rb', line 4

def supports_foreign_keys?
  true
end