lib/mongoid/matcher/elem_match.rb
# rubocop:todo all
module Mongoid
module Matcher
# In-memory matcher for $elemMatch expression.
#
# @see https://www.mongodb.com/docs/manual/reference/operator/query/elemMatch/
#
# @api private
module ElemMatch
# Returns whether a value satisfies an $elemMatch expression.
#
# @param [ true | false ] exists Not used.
# @param [ Object | Array<Object> ] value The value to check.
# @param [ Hash ] expr The $elemMatch condition predicate.
#
# @return [ true | false ] Whether the value matches.
#
# @api private
module_function def matches?(exists, value, condition)
unless Hash === condition
raise Errors::InvalidQuery, "$elemMatch requires a Hash operand: #{Errors::InvalidQuery.truncate_expr(condition)}"
end
if Array === value && !value.empty?
value.any? do |v|
ElemMatchExpression.matches?(v, condition)
end
else
# Validate the condition is valid, even though we will never attempt
# matching it.
condition.each do |k, v|
k = k.to_s
if k.start_with?('$')
begin
ExpressionOperator.get(k)
rescue Mongoid::Errors::InvalidExpressionOperator
begin
FieldOperator.get(k)
rescue Mongoid::Errors::InvalidFieldOperator => exc
raise Mongoid::Errors::InvalidElemMatchOperator.new(exc.operator)
end
end
end
end
false
end
end
end
end
end