Changeset 3201

Timestamp:

05/15/07 14:40:17 (2 years ago)

Author:

mscott

Message:

Example constraints, pass 1

Files:

• sandbox/mscott/Constraints/trunk/constraints/schema/constraints_001.py (modified) (2 diffs)

sandbox/mscott/Constraints/trunk/constraints/schema/constraints_001.py

@@ -3 +3 @@
-from schevo.schema import *
-schevo.schema.prep(locals())
+
+from schevo.functional import all
-
-
@@ -14 +16 @@
-
-    _key(name)
+
+
+class Widget(E.Entity):
+
+    name = f.unicode()
+    sprocket_list = f.entity_list('Sprocket')
+
+    _key(name)
+
+    _constraints = [
+        "all((sprocket.widget is self) for sprocket in self.sprocket_list)",
+        "len(self.sprocket_list) == self.sys.count('Sprocket', 'widget')",
+        ]
+
+
+class Sprocket(E.Entity):
+
+    name = f.unicode()
+    widget = f.entity('Widget')
+
+    _constraints = [
+        "self in self.widget.sprocket_list",
+        ]