Class: ActiveRecord::ConnectionAdapters::AbstractMysqlAdapter::Column

Inherits:
Column
  • Object
show all
Defined in:
activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb

Overview

:nodoc:

Direct Known Subclasses

Mysql2Adapter::Column, MysqlAdapter::Column

Constant Summary

Constants inherited from Column

Column::FALSE_VALUES, Column::TRUE_VALUES

Instance Attribute Summary collapse

Attributes inherited from Column

#coder, #default, #limit, #name, #null, #precision, #primary, #scale, #sql_type, #type

Instance Method Summary collapse

Methods inherited from Column

binary_to_string, #human_name, #klass, #number?, string_to_binary, #string_to_binary, string_to_date, string_to_dummy_time, string_to_time, #text?, #type_cast, #type_cast_code, value_to_boolean, value_to_decimal

Constructor Details

#initialize(name, default, sql_type = nil, null = true, collation = nil) ⇒ Column

Returns a new instance of Column.



10
11
12
13
# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 10

def initialize(name, default, sql_type = nil, null = true, collation = nil)
  super(name, default, sql_type, null)
  @collation = collation
end

Instance Attribute Details

#collationObject (readonly)

Returns the value of attribute collation



8
9
10
# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 8

def collation
  @collation
end

Instance Method Details

#adapterObject

Must return the relevant concrete adapter

Raises:

  • (NotImplementedError)


35
36
37
# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 35

def adapter
  raise NotImplementedError
end

#case_sensitive?Boolean

Returns:

  • (Boolean)


39
40
41
# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 39

def case_sensitive?
  collation && !collation.match(/_ci$/)
end

#extract_default(default) ⇒ Object



15
16
17
18
19
20
21
22
23
24
25
26
27
# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 15

def extract_default(default)
  if sql_type =~ /blob/i || type == :text
    if default.blank?
      return null ? nil : ''
    else
      raise ArgumentError, "#{type} columns cannot have a default value: #{default.inspect}"
    end
  elsif missing_default_forged_as_empty_string?(default)
    nil
  else
    super
  end
end

#has_default?Boolean

Returns:

  • (Boolean)


29
30
31
32
# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 29

def has_default?
  return false if sql_type =~ /blob/i || type == :text #mysql forbids defaults on blob and text columns
  super
end