monkey_patch.rb

PgSearch.multisearch_options = {
  :using => { tsearch: { prefix: true } }
}

module PgSearch
  class Document < ActiveRecord::Base
    before_save do
      self.organization_id = searchable.organization_id
    end
  end
end

PgSearch::Multisearch::Rebuilder.send(:remove_const, :REBUILD_SQL_TEMPLATE)

module PgSearch
  module Multisearch
    class Rebuilder
      private
      REBUILD_SQL_TEMPLATE = <<-SQL.strip_heredoc
        INSERT INTO :documents_table (searchable_type, searchable_id, content, created_at, updated_at, organization_id)
          SELECT :model_name AS searchable_type,
                 :model_table.id AS searchable_id,
                 (
                   :content_expressions
                 ) AS content,
                 :current_time AS created_at,
                 :current_time AS updated_at,
                 :model_table.organization_id
          FROM :model_table
      SQL
    end
  end
end