mongodb/mongoid · error · Mongoid::Errors::InvalidQuery

$and argument must be an array: #{Errors::InvalidQuery.trunc

Error message

$and argument must be an array: #{Errors::InvalidQuery.truncate_expr(expr)}

What it means

Error "$and argument must be an array: #{Errors::InvalidQuery.truncate_expr(expr)}" thrown in mongodb/mongoid.

Source

Thrown at lib/mongoid/matcher/and.rb:19

module Mongoid
  module Matcher
    # In-memory matcher for $and expression.
    #
    # @see https://www.mongodb.com/docs/manual/reference/operator/query/and/
    #
    # @api private
    module And
      # Returns whether a document satisfies an $and expression.
      #
      # @param [ Mongoid::Document ] document The document.
      # @param [ Array<Hash> ] expr The $and conditions.
      #
      # @return [ true | false ] Whether the document matches.
      #
      # @api private
      module_function def matches?(document, expr)
        unless expr.is_a?(Array)
          raise Errors::InvalidQuery, "$and argument must be an array: #{Errors::InvalidQuery.truncate_expr(expr)}"
        end

        if expr.empty?
          raise Errors::InvalidQuery, "$and argument must be a non-empty array: #{Errors::InvalidQuery.truncate_expr(expr)}"
        end

        expr.all? do |sub_expr|
          Expression.matches?(document, sub_expr)
        end
      end
    end
  end
end

View on GitHub (pinned to 0da0e23d71)

When it happens

Trigger: Thrown at lib/mongoid/matcher/and.rb:19 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of mongodb/mongoid@0da0e23d71 (2026-08-23). Data as JSON: /api/errors/1460e39f68ac4cf6. Report an issue: GitHub.