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ca1d13a158
Avoid extra calls to to_s
222 lines
8.3 KiB
Ruby
222 lines
8.3 KiB
Ruby
# frozen_string_literal: true
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module ActiveRecord
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module Sanitization
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extend ActiveSupport::Concern
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module ClassMethods
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# Accepts an array or string of SQL conditions and sanitizes
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# them into a valid SQL fragment for a WHERE clause.
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#
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# sanitize_sql_for_conditions(["name=? and group_id=?", "foo'bar", 4])
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# # => "name='foo''bar' and group_id=4"
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#
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# sanitize_sql_for_conditions(["name=:name and group_id=:group_id", name: "foo'bar", group_id: 4])
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# # => "name='foo''bar' and group_id='4'"
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#
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# sanitize_sql_for_conditions(["name='%s' and group_id='%s'", "foo'bar", 4])
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# # => "name='foo''bar' and group_id='4'"
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#
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# sanitize_sql_for_conditions("name='foo''bar' and group_id='4'")
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# # => "name='foo''bar' and group_id='4'"
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def sanitize_sql_for_conditions(condition)
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return nil if condition.blank?
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case condition
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when Array; sanitize_sql_array(condition)
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else condition
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end
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end
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alias :sanitize_sql :sanitize_sql_for_conditions
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# Accepts an array, hash, or string of SQL conditions and sanitizes
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# them into a valid SQL fragment for a SET clause.
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#
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# sanitize_sql_for_assignment(["name=? and group_id=?", nil, 4])
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# # => "name=NULL and group_id=4"
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#
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# sanitize_sql_for_assignment(["name=:name and group_id=:group_id", name: nil, group_id: 4])
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# # => "name=NULL and group_id=4"
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#
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# Post.sanitize_sql_for_assignment({ name: nil, group_id: 4 })
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# # => "`posts`.`name` = NULL, `posts`.`group_id` = 4"
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#
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# sanitize_sql_for_assignment("name=NULL and group_id='4'")
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# # => "name=NULL and group_id='4'"
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def sanitize_sql_for_assignment(assignments, default_table_name = table_name)
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case assignments
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when Array; sanitize_sql_array(assignments)
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when Hash; sanitize_sql_hash_for_assignment(assignments, default_table_name)
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else assignments
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end
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end
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# Accepts an array, or string of SQL conditions and sanitizes
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# them into a valid SQL fragment for an ORDER clause.
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#
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# sanitize_sql_for_order(["field(id, ?)", [1,3,2]])
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# # => "field(id, 1,3,2)"
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#
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# sanitize_sql_for_order("id ASC")
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# # => "id ASC"
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def sanitize_sql_for_order(condition)
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if condition.is_a?(Array) && condition.first.to_s.include?("?")
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enforce_raw_sql_whitelist([condition.first],
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whitelist: AttributeMethods::ClassMethods::COLUMN_NAME_ORDER_WHITELIST
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)
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# Ensure we aren't dealing with a subclass of String that might
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# override methods we use (eg. Arel::Nodes::SqlLiteral).
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if condition.first.kind_of?(String) && !condition.first.instance_of?(String)
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condition = [String.new(condition.first), *condition[1..-1]]
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end
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Arel.sql(sanitize_sql_array(condition))
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else
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condition
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end
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end
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# Sanitizes a hash of attribute/value pairs into SQL conditions for a SET clause.
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#
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# sanitize_sql_hash_for_assignment({ status: nil, group_id: 1 }, "posts")
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# # => "`posts`.`status` = NULL, `posts`.`group_id` = 1"
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def sanitize_sql_hash_for_assignment(attrs, table)
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c = connection
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attrs.map do |attr, value|
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type = type_for_attribute(attr)
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value = type.serialize(type.cast(value))
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"#{c.quote_table_name_for_assignment(table, attr)} = #{c.quote(value)}"
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end.join(", ")
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end
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# Sanitizes a +string+ so that it is safe to use within an SQL
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# LIKE statement. This method uses +escape_character+ to escape all occurrences of "\", "_" and "%".
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#
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# sanitize_sql_like("100%")
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# # => "100\\%"
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#
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# sanitize_sql_like("snake_cased_string")
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# # => "snake\\_cased\\_string"
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#
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# sanitize_sql_like("100%", "!")
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# # => "100!%"
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#
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# sanitize_sql_like("snake_cased_string", "!")
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# # => "snake!_cased!_string"
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def sanitize_sql_like(string, escape_character = "\\")
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pattern = Regexp.union(escape_character, "%", "_")
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string.gsub(pattern) { |x| [escape_character, x].join }
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end
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# Accepts an array of conditions. The array has each value
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# sanitized and interpolated into the SQL statement.
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#
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# sanitize_sql_array(["name=? and group_id=?", "foo'bar", 4])
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# # => "name='foo''bar' and group_id=4"
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#
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# sanitize_sql_array(["name=:name and group_id=:group_id", name: "foo'bar", group_id: 4])
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# # => "name='foo''bar' and group_id=4"
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#
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# sanitize_sql_array(["name='%s' and group_id='%s'", "foo'bar", 4])
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# # => "name='foo''bar' and group_id='4'"
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def sanitize_sql_array(ary)
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statement, *values = ary
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if values.first.is_a?(Hash) && /:\w+/.match?(statement)
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replace_named_bind_variables(statement, values.first)
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elsif statement.include?("?")
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replace_bind_variables(statement, values)
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elsif statement.blank?
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statement
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else
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statement % values.collect { |value| connection.quote_string(value.to_s) }
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end
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end
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private
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# Accepts a hash of SQL conditions and replaces those attributes
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# that correspond to a {#composed_of}[rdoc-ref:Aggregations::ClassMethods#composed_of]
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# relationship with their expanded aggregate attribute values.
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#
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# Given:
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#
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# class Person < ActiveRecord::Base
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# composed_of :address, class_name: "Address",
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# mapping: [%w(address_street street), %w(address_city city)]
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# end
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#
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# Then:
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#
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# { address: Address.new("813 abc st.", "chicago") }
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# # => { address_street: "813 abc st.", address_city: "chicago" }
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def expand_hash_conditions_for_aggregates(attrs) # :doc:
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expanded_attrs = {}
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attrs.each do |attr, value|
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if aggregation = reflect_on_aggregation(attr.to_sym)
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mapping = aggregation.mapping
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mapping.each do |field_attr, aggregate_attr|
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expanded_attrs[field_attr] = if value.is_a?(Array)
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value.map { |it| it.send(aggregate_attr) }
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elsif mapping.size == 1 && !value.respond_to?(aggregate_attr)
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value
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else
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value.send(aggregate_attr)
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end
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end
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else
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expanded_attrs[attr] = value
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end
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end
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expanded_attrs
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end
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deprecate :expand_hash_conditions_for_aggregates
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def replace_bind_variables(statement, values)
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raise_if_bind_arity_mismatch(statement, statement.count("?"), values.size)
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bound = values.dup
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c = connection
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statement.gsub(/\?/) do
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replace_bind_variable(bound.shift, c)
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end
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end
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def replace_bind_variable(value, c = connection)
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if ActiveRecord::Relation === value
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value.to_sql
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else
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quote_bound_value(value, c)
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end
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end
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def replace_named_bind_variables(statement, bind_vars)
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statement.gsub(/(:?):([a-zA-Z]\w*)/) do |match|
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if $1 == ":" # skip postgresql casts
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match # return the whole match
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elsif bind_vars.include?(match = $2.to_sym)
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replace_bind_variable(bind_vars[match])
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else
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raise PreparedStatementInvalid, "missing value for :#{match} in #{statement}"
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end
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end
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end
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def quote_bound_value(value, c = connection)
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if value.respond_to?(:map) && !value.acts_like?(:string)
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if value.respond_to?(:empty?) && value.empty?
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c.quote(nil)
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else
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value.map { |v| c.quote(v) }.join(",")
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end
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else
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c.quote(value)
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end
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end
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def raise_if_bind_arity_mismatch(statement, expected, provided)
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unless expected == provided
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raise PreparedStatementInvalid, "wrong number of bind variables (#{provided} for #{expected}) in: #{statement}"
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end
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end
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end
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end
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end
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