add warning

data2rdf/models/graph.py

@@ -5,6 +5,7 @@
 
 from data2rdf.qudt.utils import _get_query_match
 from data2rdf.utils import make_prefix
+from data2rdf.warnings import ParserWarning
 
 from data2rdf.models.utils import (  # isort:skip
     apply_datatype,
@@ -141,6 +142,11 @@ def validate_value(
             value = int(value)
         elif isinstance(value, str) and is_float(value):
             value = float(value)
+        elif isinstance(value, str):
+            warnings.warn(
+                f"Cannot type case value from str into float or int: {value}",
+                ParserWarning
+                )
         return value
 
     @field_validator("unit", mode="after")

tests/abox/json_custom_relations/test_json_custom_relations.py

@@ -448,17 +448,28 @@ def test_pipeline_json_custom_relations_quantity_graph() -> None:
     from rdflib import Graph
 
     from data2rdf import Data2RDF, Parser
+    from data2rdf.warnings import ParserWarning
+
+    with pytest.warns(ParserWarning, match="Cannot") as warnings:
+
+        pipeline = Data2RDF(
+            raw_data=DATA_SUBGRAPHS,
+            mapping=MAPPING_SUBGRAPHS,
+            parser=Parser.json,
+            config={
+                "base_iri": BASE_IRI,
+                "separator": "#",
+                "suppress_file_description": True,
+            },
+        )
+
+    warnings = [
+        warning
+        for warning in warnings
+        if warning.category == ParserWarning
+    ]
+    assert len(warnings) == 1
 
-    pipeline = Data2RDF(
-        raw_data=DATA_SUBGRAPHS,
-        mapping=MAPPING_SUBGRAPHS,
-        parser=Parser.json,
-        config={
-            "base_iri": BASE_IRI,
-            "separator": "#",
-            "suppress_file_description": True,
-        },
-    )
     expected_graph = Graph()
     expected_graph.parse(data=EXPECTED_SUBGRAPHS)