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module ActiveModel
module MassAssignmentSecurity
class Sanitizer
# Returns all attributes not denied by the authorizer.
def sanitize(klass, attributes, authorizer)
rejected = []
sanitized_attributes = attributes.reject do |key, value|
rejected << key if authorizer.deny?(key)
end
process_removed_attributes(klass, rejected) unless rejected.empty?
sanitized_attributes
end
protected
def process_removed_attributes(klass, attrs)
raise NotImplementedError, "#process_removed_attributes(attrs) suppose to be overwritten"
end
end
class LoggerSanitizer < Sanitizer
def initialize(target)
@target = target
super()
end
def logger
@target.logger
end
def logger?
@target.respond_to?(:logger) && @target.logger
end
def backtrace
if defined? Rails
Rails.backtrace_cleaner.clean(caller)
else
caller
end
end
def process_removed_attributes(klass, attrs)
if logger?
logger.warn do
"WARNING: Can't mass-assign protected attributes for #{klass.name}: #{attrs.join(', ')}\n" +
backtrace.map { |trace| "\t#{trace}" }.join("\n")
end
end
end
end
class StrictSanitizer < Sanitizer
def initialize(target = nil)
super()
end
def process_removed_attributes(klass, attrs)
return if (attrs - insensitive_attributes).empty?
raise ActiveModel::MassAssignmentSecurity::Error.new(klass, attrs)
end
def insensitive_attributes
['id']
end
end
class Error < StandardError
def initialize(klass, attrs)
super("Can't mass-assign protected attributes for #{klass.name}: #{attrs.join(', ')}")
end
end
end
end
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