Airbyte CDK: add filter to RemoveFields

airbyte-cdk/python/README.md

@@ -65,7 +65,7 @@ pip install -e ".[dev]" # [dev] installs development-only dependencies
 If the iteration you are working on includes changes to the models, you might want to regenerate them. In order to do that, you can run:
 
 ```bash
-./gradlew :airbyte-cdk:python:format
+./gradlew :airbyte-cdk:python:build
 ```
 
 This will generate the files based on the schemas, add the license information and format the code. If you want to only do the former and rely on

airbyte-cdk/python/airbyte_cdk/sources/declarative/declarative_component_schema.yaml

@@ -1847,6 +1847,19 @@ definitions:
       type:
         type: string
         enum: [RemoveFields]
+      condition:
+        description: The predicate to filter a property by a property value. Property will be removed if it is empty OR expression is evaluated to True.,
+        type: string
+        default: ""
+        interpolation_context:
+          - config
+          - property
+          - parameters
+        examples:
+          - "{{ property|string == '' }}"
+          - "{{ property is integer }}"
+          - "{{ property|length > 5 }}"
+          - "{{ property == 'some_string_to_match' }}"
       field_pointers:
         title: Field Paths
         description: Array of paths defining the field to remove. Each item is an array whose field describe the path of a field to remove.

airbyte-cdk/python/airbyte_cdk/sources/declarative/models/declarative_component_schema.py

@@ -579,6 +579,16 @@ class SchemaNormalization(Enum):
 
 class RemoveFields(BaseModel):
     type: Literal['RemoveFields']
+    condition: Optional[str] = Field(
+        '',
+        description="The predicate to filter a property by a property value. Property will be removed if it is empty OR expression is evaluated to True.",
+        examples=[
+            "{{ property|string == '' }}",
+            '{{ property is integer }}',
+            '{{ property|length > 5 }}',
+            "{{ property == 'some_string_to_match' }}",
+        ],
+    )
     field_pointers: List[List[str]] = Field(
         ...,
         description='Array of paths defining the field to remove. Each item is an array whose field describe the path of a field to remove.',

airbyte-cdk/python/airbyte_cdk/sources/declarative/parsers/model_to_component_factory.py

@@ -909,7 +909,7 @@ def create_record_selector(
 
     @staticmethod
     def create_remove_fields(model: RemoveFieldsModel, config: Config, **kwargs: Any) -> RemoveFields:
-        return RemoveFields(field_pointers=model.field_pointers, parameters={})
+        return RemoveFields(field_pointers=model.field_pointers, condition=model.condition or "", parameters={})
 
     def create_selective_authenticator(self, model: SelectiveAuthenticatorModel, config: Config, **kwargs: Any) -> DeclarativeAuthenticator:
         authenticators = {name: self._create_component_from_model(model=auth, config=config) for name, auth in model.authenticators.items()}

airbyte-cdk/python/airbyte_cdk/sources/declarative/transformations/remove_fields.py

@@ -7,6 +7,7 @@
 
 import dpath.exceptions
 import dpath.util
+from airbyte_cdk.sources.declarative.interpolation.interpolated_boolean import InterpolatedBoolean
 from airbyte_cdk.sources.declarative.transformations import RecordTransformation
 from airbyte_cdk.sources.declarative.types import Config, FieldPointer, StreamSlice, StreamState
 
@@ -40,6 +41,10 @@ class RemoveFields(RecordTransformation):
 
     field_pointers: List[FieldPointer]
     parameters: InitVar[Mapping[str, Any]]
+    condition: str = ""
+
+    def __post_init__(self, parameters: Mapping[str, Any]) -> None:
+        self._filter_interpolator = InterpolatedBoolean(condition=self.condition, parameters=parameters)
 
     def transform(
         self,
@@ -55,7 +60,11 @@ def transform(
         for pointer in self.field_pointers:
             # the dpath library by default doesn't delete fields from arrays
             try:
-                dpath.util.delete(record, pointer)
+                dpath.util.delete(
+                    record,
+                    pointer,
+                    afilter=(lambda x: self._filter_interpolator.eval(config or {}, property=x)) if self.condition else None,
+                )
             except dpath.exceptions.PathNotFound:
                 # if the (potentially nested) property does not exist, silently skip
                 pass

airbyte-cdk/python/unit_tests/sources/declarative/transformations/test_remove_fields.py

@@ -10,39 +10,79 @@
 
 
 @pytest.mark.parametrize(
-    ["input_record", "field_pointers", "expected"],
+    ["input_record", "field_pointers", "condition", "expected"],
     [
-        pytest.param({"k1": "v", "k2": "v"}, [["k1"]], {"k2": "v"}, id="remove a field that exists (flat dict)"),
-        pytest.param({"k1": "v", "k2": "v"}, [["k3"]], {"k1": "v", "k2": "v"}, id="remove a field that doesn't exist (flat dict)"),
-        pytest.param({"k1": "v", "k2": "v"}, [["k1"], ["k2"]], {}, id="remove multiple fields that exist (flat dict)"),
+        pytest.param({"k1": "v", "k2": "v"}, [["k1"]], None, {"k2": "v"}, id="remove a field that exists (flat dict), condition = None"),
+        pytest.param({"k1": "v", "k2": "v"}, [["k1"]], "", {"k2": "v"}, id="remove a field that exists (flat dict)"),
+        pytest.param({"k1": "v", "k2": "v"}, [["k3"]], "", {"k1": "v", "k2": "v"}, id="remove a field that doesn't exist (flat dict)"),
+        pytest.param({"k1": "v", "k2": "v"}, [["k1"], ["k2"]], "", {}, id="remove multiple fields that exist (flat dict)"),
         # TODO: should we instead splice the element out of the array? I think that's the more intuitive solution
         #  Otherwise one could just set the field's value to null.
-        pytest.param({"k1": [1, 2]}, [["k1", 0]], {"k1": [None, 2]}, id="remove field inside array (int index)"),
-        pytest.param({"k1": [1, 2]}, [["k1", "0"]], {"k1": [None, 2]}, id="remove field inside array (string index)"),
+        pytest.param({"k1": [1, 2]}, [["k1", 0]], "", {"k1": [None, 2]}, id="remove field inside array (int index)"),
+        pytest.param({"k1": [1, 2]}, [["k1", "0"]], "", {"k1": [None, 2]}, id="remove field inside array (string index)"),
         pytest.param(
             {"k1": "v", "k2": "v", "k3": [0, 1], "k4": "v"},
             [["k1"], ["k2"], ["k3", 0]],
+            "",
             {"k3": [None, 1], "k4": "v"},
             id="test all cases (flat)",
         ),
-        pytest.param({"k1": [0, 1]}, [[".", "k1", 10]], {"k1": [0, 1]}, id="remove array index that doesn't exist (flat)"),
-        pytest.param({".": {"k1": [0, 1]}}, [[".", "k1", 10]], {".": {"k1": [0, 1]}}, id="remove array index that doesn't exist (nested)"),
-        pytest.param({".": {"k2": "v", "k1": "v"}}, [[".", "k1"]], {".": {"k2": "v"}}, id="remove nested field that exists"),
+        pytest.param({"k1": [0, 1]}, [[".", "k1", 10]], "", {"k1": [0, 1]}, id="remove array index that doesn't exist (flat)"),
         pytest.param(
-            {".": {"k2": "v", "k1": "v"}}, [[".", "k3"]], {".": {"k2": "v", "k1": "v"}}, id="remove field that doesn't exist (nested)"
+            {".": {"k1": [0, 1]}}, [[".", "k1", 10]], "", {".": {"k1": [0, 1]}}, id="remove array index that doesn't exist (nested)"
         ),
-        pytest.param({".": {"k2": "v", "k1": "v"}}, [[".", "k1"], [".", "k2"]], {".": {}}, id="remove multiple fields that exist (nested)"),
+        pytest.param({".": {"k2": "v", "k1": "v"}}, [[".", "k1"]], "", {".": {"k2": "v"}}, id="remove nested field that exists"),
         pytest.param(
-            {".": {"k1": [0, 1]}}, [[".", "k1", 0]], {".": {"k1": [None, 1]}}, id="remove multiple fields that exist in arrays (nested)"
+            {".": {"k2": "v", "k1": "v"}}, [[".", "k3"]], "", {".": {"k2": "v", "k1": "v"}}, id="remove field that doesn't exist (nested)"
+        ),
+        pytest.param(
+            {".": {"k2": "v", "k1": "v"}}, [[".", "k1"], [".", "k2"]], "", {".": {}}, id="remove multiple fields that exist (nested)"
+        ),
+        pytest.param(
+            {".": {"k1": [0, 1]}},
+            [[".", "k1", 0]],
+            "",
+            {".": {"k1": [None, 1]}},
+            id="remove multiple fields that exist in arrays (nested)",
         ),
         pytest.param(
             {".": {"k1": [{"k2": "v", "k3": "v"}, {"k4": "v"}]}},
             [[".", "k1", 0, "k2"], [".", "k1", 1, "k4"]],
+            "",
             {".": {"k1": [{"k3": "v"}, {}]}},
             id="remove fields that exist in arrays (deeply nested)",
         ),
+        pytest.param(
+            {"k1": "v", "k2": "v"},
+            [["**"]],
+            "{{ False }}",
+            {"k1": "v", "k2": "v"},
+            id="do not remove any field if condition is boolean False",
+        ),
+        pytest.param({"k1": "v", "k2": "v"}, [["**"]], "{{ True }}", {}, id="remove all field if condition is boolean True"),
+        pytest.param(
+            {"k1": "v", "k2": "v1", "k3": "v1", "k4": {"k_nested": "v1", "k_nested2": "v2"}},
+            [["**"]],
+            "{{ property == 'v1' }}",
+            {"k1": "v", "k4": {"k_nested2": "v2"}},
+            id="recursively remove any field that matches property condition and leave that does not",
+        ),
+        pytest.param(
+            {"k1": "v", "k2": "some_long_string", "k3": "some_long_string", "k4": {"k_nested": "v1", "k_nested2": "v2"}},
+            [["**"]],
+            "{{ property|length > 5 }}",
+            {"k1": "v", "k4": {"k_nested": "v1", "k_nested2": "v2"}},
+            id="remove any field that have length > 5 and leave that does not",
+        ),
+        pytest.param(
+            {"k1": 255, "k2": "some_string", "k3": "some_long_string", "k4": {"k_nested": 123123, "k_nested2": "v2"}},
+            [["**"]],
+            "{{ property is integer }}",
+            {"k2": "some_string", "k3": "some_long_string", "k4": {"k_nested2": "v2"}},
+            id="recursively remove any field that of type integer and leave that does not",
+        ),
     ],
 )
-def test_remove_fields(input_record: Mapping[str, Any], field_pointers: List[FieldPointer], expected: Mapping[str, Any]):
-    transformation = RemoveFields(field_pointers=field_pointers, parameters={})
+def test_remove_fields(input_record: Mapping[str, Any], field_pointers: List[FieldPointer], condition: str, expected: Mapping[str, Any]):
+    transformation = RemoveFields(field_pointers=field_pointers, condition=condition, parameters={})
     assert transformation.transform(input_record) == expected