feat: Better multi-file consistency for File Component (#8625)

* feat: First pass at output changes for file component

* SQLite support and json parsing

* [autofix.ci] apply automated fixes

* Update base_file.py

* [autofix.ci] apply automated fixes

* Update file.py

* [autofix.ci] apply automated fixes

* Split text supporting messages

* [autofix.ci] apply automated fixes

* Support structured json data

* Routine for inclusion of sample data

* Couple more template updates

* [autofix.ci] apply automated fixes

* Update Text Sentiment Analysis.json

* Update Portfolio Website Code Generator.json

* Test coverage

* [autofix.ci] apply automated fixes

* Update constants.py

* Update base_file.py

* Update service.py

* Update src/backend/base/langflow/components/processing/split_text.py

Co-authored-by: Gabriel Luiz Freitas Almeida <gabriel@langflow.org>

* [autofix.ci] apply automated fixes

* Update service.py

* Add get file size that is unimplemented

* Update service.py

* Fix return

* Remove type annotation

* Update graph for new templates

* Update test_vector_store_rag.py

* Update stop-building.spec.ts

* [autofix.ci] apply automated fixes

* Update fileUploadComponent.spec.ts

* Update fileUploadComponent.spec.ts

* Update fileUploadComponent.spec.ts

* Update fileUploadComponent.spec.ts

* Update fileUploadComponent.spec.ts

* Update fileUploadComponent.spec.ts

* [autofix.ci] apply automated fixes

* Update fileUploadComponent.spec.ts

* test update

* Update fileUploadComponent.spec.ts

* [autofix.ci] apply automated fixes

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Edwin Jose <edwin.jose@datastax.com>
Co-authored-by: Gabriel Luiz Freitas Almeida <gabriel@langflow.org>
Co-authored-by: Mike Fortman <michael.fortman@datastax.com>

src/backend/tests/unit/components/data/test_file_component.py

@@ -0,0 +1,60 @@
+from langflow.components.data import FileComponent
+from langflow.io import Output
+
+
+class TestFileComponentDynamicOutputs:
+    def test_update_outputs_single_csv_file(self):
+        """Test single CSV file shows structured + raw outputs."""
+        component = FileComponent()
+        frontend_node = {"outputs": [], "template": {"path": {"file_path": ["test.csv"]}}}
+
+        result = component.update_outputs(frontend_node, "path", ["test.csv"])
+
+        assert len(result["outputs"]) == 3
+        output_names = [output.name for output in result["outputs"]]
+        assert "dataframe" in output_names  # Structured content
+        assert "message" in output_names  # Raw content
+        assert "path" in output_names  # File path
+
+    def test_update_outputs_single_json_file(self):
+        """Test single JSON file shows JSON + raw outputs."""
+        component = FileComponent()
+        frontend_node = {"outputs": [], "template": {"path": {"file_path": ["data.json"]}}}
+
+        result = component.update_outputs(frontend_node, "path", ["data.json"])
+
+        assert len(result["outputs"]) == 3
+        output_names = [output.name for output in result["outputs"]]
+        assert "json" in output_names  # JSON content
+        assert "message" in output_names  # Raw content
+        assert "path" in output_names  # File path
+
+    def test_update_outputs_multiple_files(self):
+        """Test multiple files show only Files output."""
+        component = FileComponent()
+        frontend_node = {"outputs": [], "template": {"path": {"file_path": ["file1.txt", "file2.txt"]}}}
+
+        result = component.update_outputs(frontend_node, "path", ["file1.txt", "file2.txt"])
+
+        assert len(result["outputs"]) == 1
+        assert result["outputs"][0].name == "dataframe"
+        assert result["outputs"][0].display_name == "Files"
+
+    def test_update_outputs_empty_path(self):
+        """Test empty path results in no outputs."""
+        component = FileComponent()
+        frontend_node = {"outputs": [], "template": {"path": {"file_path": []}}}
+
+        result = component.update_outputs(frontend_node, "path", [])
+
+        assert len(result["outputs"]) == 0
+
+    def test_update_outputs_non_path_field(self):
+        """Test non-path fields don't affect outputs."""
+        component = FileComponent()
+        original_outputs = [Output(display_name="Test", name="test", method="test_method")]
+        frontend_node = {"outputs": original_outputs, "template": {"path": {"file_path": ["value"]}}}
+
+        result = component.update_outputs(frontend_node, "other_field", "value")
+
+        assert result["outputs"] == original_outputs

src/backend/tests/unit/initial_setup/starter_projects/test_vector_store_rag.py

@@ -15,6 +15,7 @@ from langflow.graph.graph.base import Graph
 from langflow.graph.graph.constants import Finish
 from langflow.schema import Data
 from langflow.schema.dataframe import DataFrame
+from langflow.schema.message import Message
 
 
 @pytest.fixture
@@ -22,9 +23,9 @@ def ingestion_graph():
     # Ingestion Graph
     file_component = FileComponent(_id="file-123")
     file_component.set(path="test.txt")
-    file_component.set_on_output(name="dataframe", value=Data(text="This is a test file."), cache=True)
+    file_component.set_on_output(name="message", value=Message(text="This is a test file."), cache=True)
     text_splitter = SplitTextComponent(_id="text-splitter-123")
-    text_splitter.set(data_inputs=file_component.load_files)
+    text_splitter.set(data_inputs=file_component.load_files_message)
     openai_embeddings = OpenAIEmbeddingsComponent(_id="openai-embeddings-123")
     openai_embeddings.set(
         openai_api_key="sk-123", openai_api_base="https://api.openai.com/v1", openai_api_type="openai"