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?, binary_to_string, #human_name, #klass, #number?, #string_to_binary, string_to_binary, string_to_dummy_time, string_to_time, #text?, #type_cast, #type_cast_for_write, value_to_boolean, value_to_date, value_to_decimal, value_to_integer

Constructor Details

#initialize(name, default, sql_type = nil, null = true, collation = nil, strict = false, extra = "") ⇒ Column


39
40
41
42
43
44
# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 39

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

Instance Attribute Details

#collationObject (readonly)

Returns the value of attribute collation


37
38
39
# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 37

def collation
  @collation
end

#extraObject (readonly)

Returns the value of attribute extra


37
38
39
# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 37

def extra
  @extra
end

#strictObject (readonly)

Returns the value of attribute strict


37
38
39
# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 37

def strict
  @strict
end

Instance Method Details

#adapterObject

Must return the relevant concrete adapter

Raises:

  • (NotImplementedError)

70
71
72
# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 70

def adapter
  raise NotImplementedError
end

#blob_or_text_column?Boolean


65
66
67
# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 65

def blob_or_text_column?
  sql_type =~ /blob/i || type == :text
end

#case_sensitive?Boolean


74
75
76
# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 74

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

#extract_default(default) ⇒ Object


46
47
48
49
50
51
52
53
54
55
56
57
58
# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 46

def extract_default(default)
  if blob_or_text_column?
    if default.blank?
      null || strict ? 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


60
61
62
63
# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 60

def has_default?
  return false if blob_or_text_column? #mysql forbids defaults on blob and text columns
  super
end