Default values for backwards compatibility (#56)

* Default values check for backwards compatibility

Author: xiancg

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "vfxnaming"
-version = "1.5.5-beta"
+version = "1.5.6-beta"
 authors = [
   { name="Chris Granados", email="info@chrisgranados.com" },
 ]

src/vfxnaming/rules.py

@@ -86,11 +86,17 @@ def from_data(cls, data) -> "Rule":
         if data.get("_Serializable_version") is not None:
             del data["_Serializable_version"]
 
+        if not data.get("_name"):
+            raise RuleError(f"Rule name is required but was not found in {data}")
+
+        if not data.get("_pattern"):
+            raise RuleError(f"Rule pattern is required but was not found in {data}")
+
         this = cls(
             data.get("_name"),
             data.get("_pattern"),
-            data.get("_anchor"),
-            data.get("_nice_name"),
+            data.get("_anchor", cls.ANCHOR_START),
+            data.get("_nice_name", ""),
         )
         return this