forms: always add attributes to prefilled fields (#8223)

tests/test_form_pages.py

@@ -1085,3 +1085,44 @@ def test_formdata_form_file_download(pub):
     # go back to the status page, this will exercise the substitution variables
     # codepath.
     resp = resp.follow()
+
+def test_form_map_field_back_and_submit(pub):
+    formdef = create_formdef()
+    formdef.fields = [
+        fields.MapField(id='0', label='map'),
+        fields.StringField(id='1', label='street', required=False,
+            prefill={'type': 'geolocation', 'value': 'road'}),
+    ]
+    formdef.store()
+    resp = get_app(pub).get('/test/')
+    formdef.data_class().wipe()
+    assert 'qommon.map.js' in resp.body
+    assert 'qommon.geolocation.js' in resp.body
+    # with a real user interaction this would get set by javascript
+    resp.forms[0]['f0$latlng'] = '1.234;-1.234'
+    assert 'data-geolocation="road"' in resp.body
+
+    # check summary page
+    resp = resp.forms[0].submit('submit')
+    assert 'Check values then click submit.' in resp.body
+    assert 'data-init-lng="-1.234"' in resp.body
+    assert 'data-init-lat="1.234"' in resp.body
+
+    # get back to the map field
+    resp = resp.forms[0].submit('previous')
+    # check the field is still marked as holding the road
+    assert 'data-geolocation="road"' in resp.body
+    assert resp.forms[0]['f0$latlng'].value == '1.234;-1.234'
+
+    # back to summary page
+    resp = resp.forms[0].submit('submit')
+
+    # and submitting the form
+    resp = resp.forms[0].submit('submit')
+    assert resp.status_int == 302
+    resp = resp.follow()
+    assert 'The form has been recorded' in resp.body
+    assert formdef.data_class().count() == 1
+    data_id = formdef.data_class().select()[0].id
+    data = formdef.data_class().get(data_id)
+    assert data.data == {'1': None, '0': '1.234;-1.234'}

wcs/forms/root.py

@@ -388,6 +388,10 @@ class FormPage(Directory):
                         form.get_widget('f%s' % k).set_message(
                                 _('Value has been automatically prefilled.'))
                         form.get_widget('f%s' % k).prefilled = True
+
+                if field.prefill:
+                    # always set additional attributes as they will be used for
+                    # "live prefill", regardless of existing data.
                     form.get_widget('f%s' % k).prefill_attributes = field.get_prefill_attributes()
 
                 if not prefilled and form.get_widget('f%s' % k):