Class: ActiveRecord::ConnectionAdapters::AbstractMysqlAdapter

Inherits:
AbstractAdapter
  • Object
show all
Defined in:
lib/activerecord-mysql-unsigned/active_record/v3/connection_adapters/abstract_mysql_adapter.rb,
lib/activerecord-mysql-unsigned/active_record/v4/connection_adapters/abstract_mysql_adapter.rb

Direct Known Subclasses

Mysql2Adapter

Instance Method Summary collapse

Instance Method Details

#add_column_sql(table_name, column_name, type, options = {}) ⇒ Object 



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# File 'lib/activerecord-mysql-unsigned/active_record/v3/connection_adapters/abstract_mysql_adapter.rb', line 45

def add_column_sql(table_name, column_name, type, options = {})
  add_column_sql = "ADD #{quote_column_name(column_name)} #{type_to_sql(type, options[:limit], options[:precision], options[:scale], options[:unsigned], options[:auto_increment])}"
  add_column_options!(add_column_sql, options)
  add_column_position!(add_column_sql, options)
  add_column_sql
end

#change_column_sql(table_name, column_name, type, options = {}) ⇒ Object 



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# File 'lib/activerecord-mysql-unsigned/active_record/v3/connection_adapters/abstract_mysql_adapter.rb', line 52

def change_column_sql(table_name, column_name, type, options = {})
  column = column_for(table_name, column_name)

  unless type.to_sym == :primary_key
    unless options_include_default?(options)
      options[:default] = column.default
    end
    unless options.has_key?(:null)
      options[:null] = column.null
    end
  end

  change_column_sql = "CHANGE #{quote_column_name(column_name)} #{quote_column_name(column_name)} #{type_to_sql(type, options[:limit], options[:precision], options[:scale], options[:unsigned], options[:auto_increment])}"
  add_column_options!(change_column_sql, options)
  add_column_position!(change_column_sql, options)
  change_column_sql
end

#type_to_sql(type, limit = nil, precision = nil, scale = nil, unsigned = false) ⇒ Object

Maps logical Rails types to MySQL-specific data types.



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# File 'lib/activerecord-mysql-unsigned/active_record/v3/connection_adapters/abstract_mysql_adapter.rb', line 12

def type_to_sql(type, limit = nil, precision = nil, scale = nil, unsigned = false, auto_increment = false)
  case type.to_s
  when 'integer'
    case limit
    when 1
      'tinyint' + (unsigned ? ' unsigned' : '') + (auto_increment ? ' AUTO_INCREMENT' : '')
    when 2
      'smallint' + (unsigned ? ' unsigned' : '') + (auto_increment ? ' AUTO_INCREMENT' : '')
    when 3
      'mediumint' + (unsigned ? ' unsigned' : '') + (auto_increment ? ' AUTO_INCREMENT' : '')
    when nil, 4, 11 # compatibility with MySQL default
      if unsigned
        'int(10) unsigned' + (auto_increment ? ' AUTO_INCREMENT' : '')
      else
        'int(10)'
      end
    when 5..8
      'bigint' + (unsigned ? ' unsigned' : '')
    else raise(ActiveRecordError, "No integer type has byte size #{limit}")
    end
  when 'text'
    case limit
    when 0..0xff;               'tinytext'
    when nil, 0x100..0xffff;    'text'
    when 0x10000..0xffffff;     'mediumtext'
    when 0x1000000..0xffffffff; 'longtext'
    else raise(ActiveRecordError, "No text type has character length #{limit}")
    end
  else
    super
  end
end