refactor: finish declutter - test_flow removal, NOT NULL schema, parametrized tests, smoke harness, docs

backend/tests/test_models.py

@@ -1,5 +1,7 @@
 """Model-level tests: defaults, constraints, JSON roundtrip, linkage."""
 
+import uuid
+
 import pytest
 from sqlalchemy.exc import IntegrityError
 from sqlmodel import select
@@ -86,3 +88,48 @@ def test_run_and_task_linkage_with_tenant_default(session):
     tasks = session.exec(select(ApprovalTask).where(ApprovalTask.run_id == run.id)).all()
     assert len(tasks) == 1
     assert tasks[0].payload == {}
+
+
+def test_create_version_populates_input_schema(session):
+    from app.flows import store
+    from app.flows.schemas import FlowVersionCreate
+
+    d = FlowDefinition(name="cached")
+    session.add(d)
+    session.commit()
+    doc = {
+        "name": "cached",
+        "data": {
+            "nodes": [
+                {
+                    "id": "n1",
+                    "data": {
+                        "type": "ChatInput",
+                        "node": {"display_name": "Chat", "template": {}},
+                    },
+                }
+            ],
+            "edges": [],
+        },
+    }
+    version = store.create_version(session, d.id, FlowVersionCreate(langflow_json=doc))
+    assert version.input_schema["fallback"] == "textarea"
+
+
+def test_input_schema_null_rejected(session):
+    from sqlalchemy import text
+    from sqlalchemy.exc import IntegrityError
+
+    d = FlowDefinition(name="nonnull")
+    session.add(d)
+    session.commit()
+    with pytest.raises(IntegrityError):
+        session.execute(
+            text(
+                "INSERT INTO flow_versions (id, flow_id, version_no, langflow_json,"
+                " author, input_schema) VALUES (:id, :flow_id, 1, :doc, :author, NULL)"
+            ),
+            {"id": str(uuid.uuid4()), "flow_id": str(d.id), "doc": "{}", "author": "t"},
+        )
+        session.commit()
+    session.rollback()