Make schema validator to prune properties that are not present in the…

… schema instead of failing validation.

src/moeralib/naming/naming.py

@@ -1,10 +1,10 @@
 from typing import Any, cast, Sequence, Tuple
 
 import requests
-from jsonschema import validate
 from jsonschema.exceptions import ValidationError
 
 from . import schemas, types
+from ..pruning_validator import validate
 from ..structure import structure_or_none, structure_list
 
 MAIN_SERVER = 'https://naming.moera.org/moera-naming'

src/moeralib/node/caller.py

@@ -4,11 +4,11 @@
 from typing import Any, IO, Mapping, Sequence
 
 import requests
-from jsonschema import validate
 from jsonschema.exceptions import ValidationError
 
 from . import schemas
 from .types import Result, BodyFormat, SourceFormat, Body
+from ..pruning_validator import validate
 from ..structure import Structure
 
 

src/moeralib/pruning_validator.py

@@ -0,0 +1,22 @@
+import jsonschema
+
+
+def add_pruning_to_validator(validator_class):
+    validate_properties = validator_class.VALIDATORS["properties"]
+
+    def remove_additional_properties(validator, properties, instance, schema):
+        for prop in list(instance.keys()):
+            if prop not in properties:
+                del instance[prop]
+
+        for error in validate_properties(validator, properties, instance, schema,):
+            yield error
+
+    return jsonschema.validators.extend(validator_class, {"properties" : remove_additional_properties})
+
+
+PruningValidator = add_pruning_to_validator(jsonschema.validators.Draft7Validator)
+
+
+def validate(instance, schema):
+    return PruningValidator(schema).validate(instance)