1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
require 'active_support/core_ext/big_decimal/conversions'
module ActiveRecord
module ConnectionAdapters # :nodoc:
module Quoting
# Quotes the column value to help prevent
# {SQL injection attacks}[http://en.wikipedia.org/wiki/SQL_injection].
def quote(value, column = nil)
# records are quoted as their primary key
return value.quoted_id if value.respond_to?(:quoted_id)
if column
value = column.cast_type.type_cast_for_database(value)
end
_quote(value)
end
# Cast a +value+ to a type that the database understands. For example,
# SQLite does not understand dates, so this method will convert a Date
# to a String.
def type_cast(value, column)
if value.respond_to?(:quoted_id) && value.respond_to?(:id)
return value.id
end
if column
value = column.cast_type.type_cast_for_database(value)
end
_type_cast(value)
rescue TypeError
to_type = column ? " to #{column.type}" : ""
raise TypeError, "can't cast #{value.class}#{to_type}"
end
# Quotes a string, escaping any ' (single quote) and \ (backslash)
# characters.
def quote_string(s)
s.gsub(/\\/, '\&\&').gsub(/'/, "''") # ' (for ruby-mode)
end
# Quotes the column name. Defaults to no quoting.
def quote_column_name(column_name)
column_name
end
# Quotes the table name. Defaults to column name quoting.
def quote_table_name(table_name)
quote_column_name(table_name)
end
# Override to return the quoted table name for assignment. Defaults to
# table quoting.
#
# This works for mysql and mysql2 where table.column can be used to
# resolve ambiguity.
#
# We override this in the sqlite3 and postgresql adapters to use only
# the column name (as per syntax requirements).
def quote_table_name_for_assignment(table, attr)
quote_table_name("#{table}.#{attr}")
end
def quoted_true
"'t'"
end
def unquoted_true
't'
end
def quoted_false
"'f'"
end
def unquoted_false
'f'
end
def quoted_date(value)
if value.acts_like?(:time)
zone_conversion_method = ActiveRecord::Base.default_timezone == :utc ? :getutc : :getlocal
if value.respond_to?(zone_conversion_method)
value = value.send(zone_conversion_method)
end
end
value.to_s(:db)
end
private
def types_which_need_no_typecasting
[nil, Numeric, String]
end
def _quote(value)
case value
when String, ActiveSupport::Multibyte::Chars, Type::Binary::Data
"'#{quote_string(value.to_s)}'"
when true then quoted_true
when false then quoted_false
when nil then "NULL"
# BigDecimals need to be put in a non-normalized form and quoted.
when BigDecimal then value.to_s('F')
when Numeric, ActiveSupport::Duration then value.to_s
when Date, Time then "'#{quoted_date(value)}'"
when Symbol then "'#{quote_string(value.to_s)}'"
when Class then "'#{value}'"
else
"'#{quote_string(YAML.dump(value))}'"
end
end
def _type_cast(value)
case value
when Symbol, ActiveSupport::Multibyte::Chars, Type::Binary::Data
value.to_s
when true then unquoted_true
when false then unquoted_false
# BigDecimals need to be put in a non-normalized form and quoted.
when BigDecimal then value.to_s('F')
when Date, Time then quoted_date(value)
when *types_which_need_no_typecasting
value
else raise TypeError
end
end
end
end
end
|
