Use visibility condition formula for formula generator (baserow#4286)

Author: jrmi

backend/src/baserow/contrib/builder/elements/registries.py

@@ -392,6 +392,24 @@ def get_pytest_params(self, pytest_data_fixture) -> Dict[str, Any]:
             create related objects when the import / export functionality is tested.
         """
 
+    def formula_generator(
+        self, element: Element
+    ) -> Generator[str | Instance, str, None]:
+        """
+        Generator that returns formula fields for the LinkElementType.
+
+        Unlike other Element types, this one has its formula fields in the
+        page_parameters and query_prameters JSON fields.
+        """
+
+        yield from super().formula_generator(element)
+
+        # Deal with visibility_condition
+        new_formula = yield element.visibility_condition
+        if new_formula is not None:
+            element.visibility_condition = new_formula
+            yield element
+
 
 ElementTypeSubClass = TypeVar("ElementTypeSubClass", bound=ElementType)
 

changelog/entries/unreleased/bug/fix_visibility_condition_not_working_if_data_property_wasnt_.json

@@ -0,0 +1,9 @@
+{
+    "type": "bug",
+    "message": "Fix visibility condition not working if data property wasn't used in page",
+    "issue_origin": "github",
+    "issue_number": null,
+    "domain": "builder",
+    "bullet_points": [],
+    "created_at": "2025-11-18"
+}