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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
module ActiveRecord
module Sanitization
extend ActiveSupport::Concern
module ClassMethods
def quote_value(value, column) #:nodoc:
connection.quote(value, column)
end
# Used to sanitize objects before they're used in an SQL SELECT statement. Delegates to <tt>connection.quote</tt>.
def sanitize(object) #:nodoc:
connection.quote(object)
end
protected
# Accepts an array, hash, or string of SQL conditions and sanitizes
# them into a valid SQL fragment for a WHERE clause.
# ["name='%s' and group_id='%s'", "foo'bar", 4] returns "name='foo''bar' and group_id='4'"
# { name: "foo'bar", group_id: 4 } returns "name='foo''bar' and group_id='4'"
# "name='foo''bar' and group_id='4'" returns "name='foo''bar' and group_id='4'"
def sanitize_sql_for_conditions(condition, table_name = self.table_name)
return nil if condition.blank?
case condition
when Array; sanitize_sql_array(condition)
when Hash; sanitize_sql_hash_for_conditions(condition, table_name)
else condition
end
end
alias_method :sanitize_sql, :sanitize_sql_for_conditions
alias_method :sanitize_conditions, :sanitize_sql
# Accepts an array, hash, or string of SQL conditions and sanitizes
# them into a valid SQL fragment for a SET clause.
# { name: nil, group_id: 4 } returns "name = NULL , group_id='4'"
def sanitize_sql_for_assignment(assignments, default_table_name = self.table_name)
case assignments
when Array; sanitize_sql_array(assignments)
when Hash; sanitize_sql_hash_for_assignment(assignments, default_table_name)
else assignments
end
end
# Accepts a hash of SQL conditions and replaces those attributes
# that correspond to a +composed_of+ relationship with their expanded
# aggregate attribute values.
# Given:
# class Person < ActiveRecord::Base
# composed_of :address, class_name: "Address",
# mapping: [%w(address_street street), %w(address_city city)]
# end
# Then:
# { address: Address.new("813 abc st.", "chicago") }
# # => { address_street: "813 abc st.", address_city: "chicago" }
def expand_hash_conditions_for_aggregates(attrs)
expanded_attrs = {}
attrs.each do |attr, value|
if aggregation = reflect_on_aggregation(attr.to_sym)
mapping = aggregation.mapping
mapping.each do |field_attr, aggregate_attr|
if mapping.size == 1 && !value.respond_to?(aggregate_attr)
expanded_attrs[field_attr] = value
else
expanded_attrs[field_attr] = value.send(aggregate_attr)
end
end
else
expanded_attrs[attr] = value
end
end
expanded_attrs
end
# Sanitizes a hash of attribute/value pairs into SQL conditions for a WHERE clause.
# { name: "foo'bar", group_id: 4 }
# # => "name='foo''bar' and group_id= 4"
# { status: nil, group_id: [1,2,3] }
# # => "status IS NULL and group_id IN (1,2,3)"
# { age: 13..18 }
# # => "age BETWEEN 13 AND 18"
# { 'other_records.id' => 7 }
# # => "`other_records`.`id` = 7"
# { other_records: { id: 7 } }
# # => "`other_records`.`id` = 7"
# And for value objects on a composed_of relationship:
# { address: Address.new("123 abc st.", "chicago") }
# # => "address_street='123 abc st.' and address_city='chicago'"
def sanitize_sql_hash_for_conditions(attrs, default_table_name = self.table_name)
attrs = PredicateBuilder.resolve_column_aliases self, attrs
attrs = expand_hash_conditions_for_aggregates(attrs)
table = Arel::Table.new(table_name, arel_engine).alias(default_table_name)
PredicateBuilder.build_from_hash(self, attrs, table).map { |b|
connection.visitor.compile b
}.join(' AND ')
end
alias_method :sanitize_sql_hash, :sanitize_sql_hash_for_conditions
# Sanitizes a hash of attribute/value pairs into SQL conditions for a SET clause.
# { status: nil, group_id: 1 }
# # => "status = NULL , group_id = 1"
def sanitize_sql_hash_for_assignment(attrs, table)
c = connection
attrs.map do |attr, value|
"#{c.quote_table_name_for_assignment(table, attr)} = #{quote_bound_value(value, c, columns_hash[attr.to_s])}"
end.join(', ')
end
# Sanitizes a +string+ so that it is safe to use within an SQL
# LIKE statement. This method uses +escape_character+ to escape all occurrences of "\", "_" and "%"
def sanitize_sql_like(string, escape_character = "\\")
pattern = Regexp.union(escape_character, "%", "_")
string.gsub(pattern) { |x| [escape_character, x].join }
end
# Accepts an array of conditions. The array has each value
# sanitized and interpolated into the SQL statement.
# ["name='%s' and group_id='%s'", "foo'bar", 4] returns "name='foo''bar' and group_id='4'"
def sanitize_sql_array(ary)
statement, *values = ary
if values.first.is_a?(Hash) && statement =~ /:\w+/
replace_named_bind_variables(statement, values.first)
elsif statement.include?('?')
replace_bind_variables(statement, values)
elsif statement.blank?
statement
else
statement % values.collect { |value| connection.quote_string(value.to_s) }
end
end
def replace_bind_variables(statement, values) #:nodoc:
raise_if_bind_arity_mismatch(statement, statement.count('?'), values.size)
bound = values.dup
c = connection
statement.gsub('?') do
replace_bind_variable(bound.shift, c)
end
end
def replace_bind_variable(value, c = connection) #:nodoc:
if ActiveRecord::Relation === value
value.to_sql
else
quote_bound_value(value, c)
end
end
def replace_named_bind_variables(statement, bind_vars) #:nodoc:
statement.gsub(/(:?):([a-zA-Z]\w*)/) do
if $1 == ':' # skip postgresql casts
$& # return the whole match
elsif bind_vars.include?(match = $2.to_sym)
replace_bind_variable(bind_vars[match])
else
raise PreparedStatementInvalid, "missing value for :#{match} in #{statement}"
end
end
end
def quote_bound_value(value, c = connection, column = nil) #:nodoc:
if column
c.quote(value, column)
elsif value.respond_to?(:map) && !value.acts_like?(:string)
if value.respond_to?(:empty?) && value.empty?
c.quote(nil)
else
value.map { |v| c.quote(v) }.join(',')
end
else
c.quote(value)
end
end
def raise_if_bind_arity_mismatch(statement, expected, provided) #:nodoc:
unless expected == provided
raise PreparedStatementInvalid, "wrong number of bind variables (#{provided} for #{expected}) in: #{statement}"
end
end
end
# TODO: Deprecate this
def quoted_id
self.class.quote_value(id, column_for_attribute(self.class.primary_key))
end
end
end
|
