ActiveRecord::ConnectionAdapters::Mysql2Column

    # File lib/active_record/connection_adapters/mysql2_adapter.rb, line 23
23:       def extract_default(default)
24:         if sql_type =~ /blob/ || type == :text
25:           if default.blank?
26:             return null ? nil : ''
27:           else
28:             raise ArgumentError, "#{type} columns cannot have a default value: #{default.inspect}"
29:           end
30:         elsif missing_default_forged_as_empty_string?(default)
31:           nil
32:         else
33:           super
34:         end
35:       end

    # File lib/active_record/connection_adapters/mysql2_adapter.rb, line 37
37:       def has_default?
38:         return false if sql_type =~ /blob/ || type == :text #mysql forbids defaults on blob and text columns
39:         super
40:       end

    # File lib/active_record/connection_adapters/mysql2_adapter.rb, line 43
43:       def klass
44:         case type
45:           when :integer       then Fixnum
46:           when :float         then Float
47:           when :decimal       then BigDecimal
48:           when :datetime      then Time
49:           when :date          then Date
50:           when :timestamp     then Time
51:           when :time          then Time
52:           when :text, :string then String
53:           when :binary        then String
54:           when :boolean       then Object
55:         end
56:       end

    # File lib/active_record/connection_adapters/mysql2_adapter.rb, line 58
58:       def type_cast(value)
59:         return nil if value.nil?
60:         case type
61:           when :string                then value
62:           when :text                  then value
63:           when :integer               then value.to_i rescue value ? 1 : 0
64:           when :float                 then value.to_f # returns self if it's already a Float
65:           when :decimal               then self.class.value_to_decimal(value)
66:           when :datetime, :timestamp  then value.class == Time ? value : self.class.string_to_time(value)
67:           when :time                  then value.class == Time ? value : self.class.string_to_dummy_time(value)
68:           when :date                  then value.class == Date ? value : self.class.string_to_date(value)
69:           when :binary                then value
70:           when :boolean               then self.class.value_to_boolean(value)
71:           else value
72:         end
73:       end

    # File lib/active_record/connection_adapters/mysql2_adapter.rb, line 75
75:       def type_cast_code(var_name)
76:         case type
77:           when :string                then nil
78:           when :text                  then nil
79:           when :integer               then "#{var_name}.to_i rescue #{var_name} ? 1 : 0"
80:           when :float                 then "#{var_name}.to_f"
81:           when :decimal               then "#{self.class.name}.value_to_decimal(#{var_name})"
82:           when :datetime, :timestamp  then "#{var_name}.class == Time ? #{var_name} : #{self.class.name}.string_to_time(#{var_name})"
83:           when :time                  then "#{var_name}.class == Time ? #{var_name} : #{self.class.name}.string_to_dummy_time(#{var_name})"
84:           when :date                  then "#{var_name}.class == Date ? #{var_name} : #{self.class.name}.string_to_date(#{var_name})"
85:           when :binary                then nil
86:           when :boolean               then "#{self.class.name}.value_to_boolean(#{var_name})"
87:           else nil
88:         end
89:       end

     # File lib/active_record/connection_adapters/mysql2_adapter.rb, line 100
100:         def extract_limit(sql_type)
101:           case sql_type
102:           when /blob|text/
103:             case sql_type
104:             when /tiny/
105:               255
106:             when /medium/
107:               16777215
108:             when /long/
109:               2147483647 # mysql only allows 2^31-1, not 2^32-1, somewhat inconsistently with the tiny/medium/normal cases
110:             else
111:               super # we could return 65535 here, but we leave it undecorated by default
112:             end
113:           when /^bigint/;    8
114:           when /^int/;       4
115:           when /^mediumint/; 3
116:           when /^smallint/;  2
117:           when /^tinyint/;   1
118:           else
119:             super
120:           end
121:         end

     # File lib/active_record/connection_adapters/mysql2_adapter.rb, line 130
130:         def missing_default_forged_as_empty_string?(default)
131:           type != :string && !null && default == ''
132:         end

    # File lib/active_record/connection_adapters/mysql2_adapter.rb, line 92
92:         def simplified_type(field_type)
93:           return :boolean if Mysql2Adapter.emulate_booleans && field_type.downcase.index(BOOL)
94:           return :string  if field_type =~ /enum/ or field_type =~ /set/
95:           return :integer if field_type =~ /year/
96:           return :binary  if field_type =~ /bit/
97:           super
98:         end