add_field block - batch processing exception causes all records to be rejected #387

core/src/datayoga_core/blocks/add_field/block.py

@@ -5,7 +5,7 @@
 from datayoga_core import expression, utils
 from datayoga_core.block import Block as DyBlock
 from datayoga_core.context import Context
-from datayoga_core.result import BlockResult
+from datayoga_core.result import BlockResult, Result, Status
 
 logger = logging.getLogger("dy")
 
@@ -22,10 +22,35 @@ def init(self, context: Optional[Context] = None):
 
     async def run(self, data: List[Dict[str, Any]]) -> BlockResult:
         logger.debug(f"Running {self.get_block_name()}")
-        for field, expr in self.fields.items():
-            expression_results = expr.search_bulk(data)
-
-            for i, row in enumerate(data):
-                utils.set_field(row, field, expression_results[i])
+        result = BlockResult()
 
+        for field, expr in self.fields.items():
+            try:
+                # Try batch processing first
+                expression_results = expr.search_bulk(data)
+
+                # If successful, set fields for all records
+                for i, row in enumerate(data):
+                    utils.set_field(row, field, expression_results[i])
+            except Exception as e:
+                logger.debug(
+                    f"Batch processing failed for field {field} with {e}, falling back to individual processing")
+
+                # Process each record individually
+                for row in data:
+                    try:
+                        single_result = expr.search(row)
+                        utils.set_field(row, field, single_result)
+
+                    except Exception as record_error:
+                        # Add to rejected list with error message
+                        result.rejected.append(Result(status=Status.REJECTED, payload=row, message=f"{record_error}"))
+                        continue
+
+                    # Add to processed list if successful
+                    result.processed.append(Result(status=Status.SUCCESS, payload=row))
+
+                return result
+
+        # If we get here, batch processing was successful for all fields
         return utils.all_success(data)

core/src/datayoga_core/blocks/add_field/tests/test_add_field.py

@@ -1,6 +1,7 @@
 import pytest
 from datayoga_core import utils
 from datayoga_core.blocks.add_field.block import Block
+from datayoga_core.result import Status
 
 
 @pytest.mark.asyncio
@@ -122,3 +123,48 @@ async def test_add_field_with_dot():
     ]) == utils.all_success([
         {"fname": "john", "lname": "doe", "name.full_name": "john doe"}
     ])
+
+
+@pytest.mark.asyncio
+async def test_single_record_failure():
+    """Test case showing that JSON parse failures on some records shouldn't fail the entire batch."""
+    block = Block({
+        "field": "parsed",
+        "language": "jmespath",
+        "expression": "json_parse(JSON_FORMAT)"
+    })
+    block.init()
+
+    test_data = [
+        {"JSON_FORMAT": '{"valid": "json1"}'},
+        {"JSON_FORMAT": "{invalid_json1"},
+        {"JSON_FORMAT": '{"valid": "json2"}'},
+        {"JSON_FORMAT": "{invalid_json2"},
+        {"JSON_FORMAT": '{"valid": "json3"}'},
+        {"JSON_FORMAT": '{"name": "test"}'}
+    ]
+
+    result = await block.run(test_data)
+
+    # Check counts
+    assert len(result.processed) == 4  # Should have 4 successful records
+    assert len(result.rejected) == 2   # Should have 2 rejected records
+    assert len(result.filtered) == 0
+
+    # Check processed records
+    for i, record in enumerate(result.processed):
+        assert record.status == Status.SUCCESS
+        if i == 0:
+            assert record.payload["parsed"] == {"valid": "json1"}
+        elif i == 1:
+            assert record.payload["parsed"] == {"valid": "json2"}
+        elif i == 2:
+            assert record.payload["parsed"] == {"valid": "json3"}
+        elif i == 3:
+            assert record.payload["parsed"] == {"name": "test"}
+
+    # Check rejected records
+    for record in result.rejected:
+        assert record.status == Status.REJECTED
+        assert "invalid_json" in record.payload["JSON_FORMAT"]
+        assert record.message  # Should contain JSON parse error