method

include?

v7.0.0 - Show latest stable - Class: ActiveRecord::FinderMethods

include?(record)

public

Returns true if the relation contains the given record or false otherwise.

No query is performed if the relation is loaded; the given record is compared to the records in memory. If the relation is unloaded, an efficient existence query is performed, as in #exists?.

# File activerecord/lib/active_record/relation/finder_methods.rb, line 352
    def include?(record)
      if loaded? || offset_value || limit_value || having_clause.any?
        records.include?(record)
      else
        record.is_a?(klass) && exists?(record.id)
      end
    end

include?

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