我有这个错误：
未定义的方法`map_text_url＆＃39;对于＃
这是我的/Users/felipevelasquez/Desktop/APPS/meetrico/meetrico-production/app/views/coworking_spaces/_form.html.haml
23: .field.columns
24: = f.label :map_text_url, "Url Imagen del mapa"
25: %br/
26: = f.text_area :map_text_url, :size => "40x4", class: 'image-text'
27: .field.columns
28: = f.label :map_file, "O sube una imagen"
29: - if @coworking_space.map_file?
模板包含跟踪：app / views / coworking_spaces / new.html.haml
这是我的new.html.haml
%h1 Nuevo Espacio
= render 'form'
= link_to 'Back', coworking_spaces_path
错误在哪里？