require Rails.root.join("app", "helpers", "html_to_string_helper") namespace :'2018_03_06_clean_html_textareas' do task clean: :environment do include ActionView::Helpers::TextHelper include HtmlToStringHelper types_de_champ = TypeDeChamp.joins(:champ) .where(type_champ: "textarea") .where("champs.value LIKE '%<%'") types_de_champ.find_each do |tdc| tdc.champ.each { |c| c.update_column(:value, html_to_string(c.value)) } end end end