Module: Foreigner::Semantics::Sql2003

Included in:
ConnectionAdapters::MysqlAdapter, ConnectionAdapters::PostgreSQLAdapter, ConnectionAdapters::SQLite3Adapter
Defined in:
lib/foreigner/semantics/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/semantics/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"
  reference = sql_for_reference(to_table, primary_key)
  dependency = sql_for_dependency(options[:dependent])

  execute(sql_for_add_foreign_key(from_table, foreign_key_name, column, reference, dependency))
end

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



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

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

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

#remove_foreign_key(table, options) ⇒ Object 



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# File 'lib/foreigner/semantics/sql_2003.rb', line 27

def remove_foreign_key(table, options)
  # If the second argument is table name (String/Symbol) then convert that to the
  # to the full options hash
  options = { :column => column_name(options) } if String === options || Symbol === options
  execute(sql_for_remove_foreign_key(table, foreign_key_name(table, options[:column], options)))
end

#supports_foreign_keys? ⇒ Boolean

Returns:

  • (Boolean) 


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

def supports_foreign_keys?
  true
end