Mark frozen fields

mex/common/identity/models.py

@@ -1,11 +1,15 @@
+from typing import Annotated
+
+from pydantic import Field
+
 from mex.common.models import BaseModel
 from mex.common.types import Identifier, PrimarySourceID
 
 
 class Identity(BaseModel):
     """Model for identifier lookup."""
 
-    identifier: Identifier
-    hadPrimarySource: PrimarySourceID
-    identifierInPrimarySource: str
-    stableTargetId: Identifier
+    identifier: Annotated[Identifier, Field(frozen=True)]
+    hadPrimarySource: Annotated[PrimarySourceID, Field(frozen=True)]
+    identifierInPrimarySource: Annotated[str, Field(frozen=True)]
+    stableTargetId: Annotated[Identifier, Field(frozen=True)]

mex/common/models/base.py

@@ -235,6 +235,7 @@ class MExModel(BaseModel):
                 "entity-type or whether this item was extracted, merged, etc. "
                 "identifiers will be assigned just once."
             ),
+            frozen=True,
         ),
     ]
 

mex/common/models/extracted_data.py

@@ -48,6 +48,7 @@ class ExtractedData(MExModel):
                 "The primary source for MEx has itself as a primary source, which "
                 "is meant to be the only loop in the graph formed by MEx metadata."
             ),
+            frozen=True,
         ),
     ]
     identifierInPrimarySource: Annotated[
@@ -63,6 +64,7 @@ class ExtractedData(MExModel):
             ),
             examples=["123456", "item-501", "D7/x4/zz.final3"],
             min_length=1,
+            frozen=True,
         ),
     ]