lib/mongoid/matcher/field_expression.rb
# rubocop:todo all
module Mongoid
module Matcher
# Singleton module used for evaluating whether a given
# value in-memory matches an MSQL query expression related
# to a specific field.
#
# @api private
module FieldExpression
# Returns whether a value satisfies a condition.
#
# @param [ true | false ] exists Whether the value exists.
# @param [ Object ] value The value to check.
# @param [ Hash | Object ] condition The condition predicate.
#
# @return [ true | false ] Whether the value matches.
#
# @api private
module_function def matches?(exists, value, condition)
if condition.is_a?(Hash)
condition.all? do |k, cond_v|
k = k.to_s
if k.start_with?('$')
if %w($regex $options).include?(k)
unless condition.key?('$regex')
raise Errors::InvalidQuery, "$regex is required if $options is given: #{Errors::InvalidQuery.truncate_expr(condition)}"
end
if k == '$regex'
if options = condition['$options']
cond_v = case cond_v
when Regexp
BSON::Regexp::Raw.new(cond_v.source, options)
when BSON::Regexp::Raw
BSON::Regexp::Raw.new(cond_v.pattern, options)
else
BSON::Regexp::Raw.new(cond_v, options)
end
elsif String === cond_v
cond_v = BSON::Regexp::Raw.new(cond_v)
end
FieldOperator.get(k).matches?(exists, value, cond_v)
else
# $options are matched as part of $regex
true
end
else
FieldOperator.get(k).matches?(exists, value, cond_v)
end
elsif Hash === value
sub_values = Matcher.extract_attribute(value, k)
if sub_values.length > 0
sub_values.any? do |sub_v|
Eq.matches?(true, sub_v, cond_v)
end
else
Eq.matches?(false, nil, cond_v)
end
else
false
end
end
else
case condition
when ::Regexp, BSON::Regexp::Raw
Regex.matches_array_or_scalar?(value, condition)
else
Eq.matches?(exists, value, condition)
end
end
end
end
end
end