Getting hybrid property support.

crudkit/core/spec.py

@@ -1,5 +1,6 @@
 from typing import List, Tuple, Set, Dict, Optional
 from sqlalchemy import asc, desc
+from sqlalchemy.ext.hybrid import hybrid_property
 from sqlalchemy.orm import aliased, selectinload
 from sqlalchemy.orm.attributes import InstrumentedAttribute
 
@@ -48,7 +49,7 @@ class CRUDSpec:
                 current_alias = alias
                 continue
 
-            if isinstance(attr_obj, InstrumentedAttribute) or hasattr(attr_obj, "clauses"):
+            if isinstance(attr_obj, InstrumentedAttribute) or getattr(attr_obj, "comparator", None) is not None or hasattr(attr_obj, "clauses"):
                 return attr_obj, tuple(join_path) if join_path else None
 
         return None, None
@@ -152,31 +153,34 @@ class CRUDSpec:
         self._rel_field_names = rel_field_names
         return root_fields, rel_field_names
 
-    def get_eager_loads(self, root_alias, *, fields_map: Optional[Dict[Tuple[str, ...], List[str]]] = None):
+    def get_eager_loads(self, root_alias, *, fields_map=None):
         loads = []
         for path in self.eager_paths:
             current = root_alias
             loader = None
-
             for idx, name in enumerate(path):
                 rel_attr = getattr(current, name)
+                loader = selectinload(rel_attr) if loader is None else loader.selectinload(rel_attr)
 
-                if loader is None:
-                    loader = selectinload(rel_attr)
-                else:
-                    loader = loader.selectinload(rel_attr)
-
-                current = rel_attr.property.mapper.class_
+                # step to target class for the next hop
+                target_cls = rel_attr.property.mapper.class_
+                current = target_cls
 
+                # if final hop and we have a fields map, narrow columns
                 if fields_map and idx == len(path) - 1 and path in fields_map:
-                    target_cls = current
-                    cols = [getattr(target_cls, n) for n in fields_map[path] if hasattr(target_cls, n)]
+                    cols = []
+                    for n in fields_map[path]:
+                        attr = getattr(target_cls, n, None)
+                        # Only include real column attributes; skip hybrids/expressions
+                        if isinstance(attr, InstrumentedAttribute):
+                            cols.append(attr)
+
+                    # Only apply load_only if we have at least one real column
                     if cols:
                         loader = loader.load_only(*cols)
 
             if loader is not None:
                 loads.append(loader)
-
         return loads
 
     def get_join_paths(self):

inventory/models/inventory.py

@@ -1,6 +1,7 @@
 from typing import List, Optional
 
-from sqlalchemy import Boolean, DateTime, ForeignKey, Index, Integer, Unicode
+from sqlalchemy import Boolean, DateTime, ForeignKey, Integer, String, Unicode, case, cast, func
+from sqlalchemy.ext.hybrid import hybrid_property
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 from sqlalchemy.sql import expression as sql
 
@@ -57,3 +58,22 @@ class Inventory(Base, CRUDMixin):
             parts.append(f"location={repr(self.location.identifier)}")
 
         return f"<Inventory({', '.join(parts)})>"
+
+    @hybrid_property
+    def label(self):
+        if self.name:
+            return f"Name: {self.name}"
+        if self.barcode:
+            return f"Barcode: {self.barcode}"
+        if self.serial:
+            return f"Serial: {self.serial}"
+        return f"ID: {self.id}"
+
+    @label.expression
+    def label(cls):
+        return case(
+            (cls.name.isnot(None) & (cls.name != ''),    func.concat("Name: ", cls.name)),
+            (cls.barcode.isnot(None) & (cls.barcode != ''), func.concat("Barcode: ", cls.barcode)),
+            (cls.serial.isnot(None) & (cls.serial != ''),   func.concat("Serial: ", cls.serial)),
+            else_=func.concat("ID: ", cast(cls.id, String)),
+        )

inventory/routes/index.py

@@ -22,7 +22,7 @@ def init_index_routes(app):
                 "start_time",
                 "contact.last_name",
                 "contact.first_name",
-                "work_item.name",
+                "work_item.label",
                 "work_item.device_type.description"
             ],
             "sort": "start_time"
@@ -32,7 +32,7 @@ def init_index_routes(app):
             {"field": "start_time", "label": "Start", "format": "date"},
             {"field": "contact.last_name", "label": "Contact",
              "link": {"endpoint": "user.get_item", "params": {"id": "{contact.id}"}}},
-            {"field": "work_item.name", "label": "Work Item",
+            {"field": "work_item.label", "label": "Work Item",
              "link": {"endpoint": "inventory.get_item", "params": {"id": "{work_item.id}"}}},
             {"field": "work_item.device_type.description", "label": "Device Type"}
         ]