fix comment's form handling: don't put comments relation in hidden section,...

fix comment's form handling: don't put comments relation in hidden section, simply use an HiddenInput. Also fix new comment detection

views.py

@@ -28,6 +28,5 @@
 from cubicweb.web.views import primary, baseviews, xmlrss, basecontrollers, treeview
 
 _afs = uicfg.autoform_section
-_afs.tag_subject_of(('*', 'comments', '*'), formtype='main', section='hidden')
 _afs.tag_object_of(('*', 'comments', '*'), formtype='main', section='hidden')
 
@@ -32,5 +31,8 @@
 _afs.tag_object_of(('*', 'comments', '*'), formtype='main', section='hidden')
 
+_affk = uicfg.autoform_field_kwargs
+_affk.tag_subject_of(('*', 'comments', '*'), {'widget': fw.HiddenInput})
+
 _abaa = uicfg.actionbox_appearsin_addmenu
 _abaa.tag_subject_of(('*', 'comments', '*'),  False)
 _abaa.tag_object_of(('*', 'comments', '*'), False)
@@ -219,6 +221,9 @@
         self._cw.add_js(('cubicweb.edition.js', 'cubes.comment.js'))
         if newcomment is None:
             newcomment = commented
+            formvalues = {'comments': commented.eid}
+        else:
+            formvalues = {}
         if self._cw.cnx.anonymous_connection:
             self.propose_to_login()
         # hack to avoid tabindex conflicts caused by Ajax requests
@@ -242,12 +247,6 @@
                                 domid='commentForm%s' % commented.eid,
                                 form_buttons=buttons)
             cform = form
-        if newcomment is not None:
-            cform.append_field(cform.field_by_name('comments', 'subject',
-                                                eschema=newcomment.e_schema))
-            formvalues = {'comments': commented.eid}
-        else:
-            formvalues = {}
         self.w(u'<div id="comment%sSlot">%s</div>' % (
             commented.eid, form.render(formvalues={'comments': commented.eid},
                                        main_form_title=u'',