backoffice: link to individual fields in data source usage pane (#63947)

wcs/admin/data_sources.py

@@ -376,12 +376,11 @@ class NamedDataSourcePage(Directory):
         )
 
     def usage_in_formdefs(self):
-        formdefs = []
+        fields = []
         for formdef in get_formdefs_of_all_kinds():
-            if self.datasource.is_used_in_formdef(formdef):
-                formdefs.append(formdef)
-        formdefs.sort(key=lambda x: x.name.lower())
-        return formdefs
+            fields.extend(list(self.datasource.usage_in_formdef(formdef)))
+        fields.sort(key=lambda x: x._formdef.name.lower())
+        return fields
 
     def has_preview_block(self):
         return bool(self.datasource.type in ('json', 'geojson', 'formula', 'jsonvalue', 'wcs:users'))

wcs/data_sources.py

@@ -1186,18 +1186,18 @@ class NamedDataSource(XmlStorableObject):
         from wcs.formdef import get_formdefs_of_all_kinds
 
         for formdef in get_formdefs_of_all_kinds():
-            if self.is_used_in_formdef(formdef):
+            if any(self.usage_in_formdef(formdef)):
                 return True
         return False
 
-    def is_used_in_formdef(self, formdef):
+    def usage_in_formdef(self, formdef):
         for field in formdef.fields or []:
             data_source = getattr(field, 'data_source', None)
             if not data_source:
                 continue
             if data_source.get('type') == self.slug:
-                return True
-        return False
+                field._formdef = formdef
+                yield field
 
 
 class StubNamedDataSource(NamedDataSource):

wcs/fields/base.py

@@ -255,6 +255,12 @@ class Field:
             return ''
         return self._formdef.get_field_admin_url(field=self)
 
+    def get_admin_url_label(self):
+        return _('%(form)s, field: "%(field)s"') % {
+            'form': self._formdef.name,
+            'field': self.ellipsized_label,
+        }
+
     @property
     def include_in_listing(self):
         return 'listings' in (self.display_locations or [])

wcs/templates/wcs/backoffice/data-source.html

@@ -90,13 +90,13 @@
       </div>
     {% endif %}
 
-    {% with formdefs=view.usage_in_formdefs %}
-      {% if formdefs %}
+    {% with fields=view.usage_in_formdefs %}
+      {% if fields %}
         <div class="section">
           <h3>{% trans "Usage in forms" %}</h3>
           <ul class="objects-list single-links">
-            {% for formdef in formdefs %}
-              <li><a href="{{ formdef.get_admin_url }}">{{ formdef.name }}</a></li>
+            {% for field in fields %}
+              <li><a href="{{ field.get_admin_url }}">{{ field.get_admin_url_label }}</a></li>
             {% endfor %}
           </ul>
         </div>

wcs/utils.py

@@ -85,10 +85,7 @@ def grep_strings(string, hit_function):
 
         for field in formdef.fields or []:
             url = formdef.get_field_admin_url(field)
-            source_name = _('%(form)s, field: "%(field)s"') % {
-                'form': formdef.name,
-                'field': field.ellipsized_label,
-            }
+            source_name = field.get_admin_url_label()
             for attr in field.get_admin_attributes():
                 if check_string(getattr(field, attr, None), source_url=url, source_name=source_name):
                     break