refactor(graph.py): implement safe index creation and specific exception handling #266
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Actionable comments posted: 1
🤖 Fix all issues with AI agents
In `@backend/app/database/falkor/code-graph-backend/api/graph.py`:
- Around line 55-65: The _safe_create_index method currently swallows
non-"already exists" ResponseError and all other Exceptions, letting __init__
proceed without required indexes; change _safe_create_index (and any callers in
__init__) to propagate critical failures: for ResponseError that is not an
"already exists" case re-raise the exception (or return a falsy status) instead
of only logging, and for generic Exception re-raise after logging so the caller
can abort initialization; ensure callers in __init__ check the returned status
(if you choose status returns) and raise/stop initialization when index creation
fails.
🧹 Nitpick comments (2)
backend/app/database/falkor/code-graph-backend/api/graph.py (2)
54-54: Stale comment - does not describe the helper method.The comment "index File path, name and ext fields" appears to be leftover from previous code. It doesn't accurately describe the generic
_safe_create_indexhelper.📝 Suggested fix
- # index File path, name and ext fields - def _safe_create_index(self, func, label, *args): + def _safe_create_index(self, func, label, *args): + """Safely create an index, handling 'already exists' gracefully."""
60-60: String-based error detection can be improved with Cypher'sIF NOT EXISTSclause.While
"already exists" in str(e).lower()correctly matches FalkorDB's documented error format ("There already exists an index (:Label {property})"), a more robust approach is to useCREATE INDEX ... IF NOT EXISTSin the Cypher query itself. This eliminates the need for post-hoc string-based error handling and is supported by FalkorDB's Neo4j-compatible syntax.If string-based detection is preferred, the current implementation is adequate; however, the suggested pattern
"index already defined"does not appear in FalkorDB's documented error messages.
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Actionable comments posted: 1
🤖 Fix all issues with AI agents
In `@backend/app/database/falkor/code-graph-backend/api/graph.py`:
- Around line 54-68: The _safe_create_index method has inconsistent indentation
and a stale comment; fix it by normalizing to consistent 4-space indentation for
the entire function body, aligning the try/except/else/raise blocks correctly,
and remove or update the outdated comment above the function; ensure the
ResponseError except block checks "already exists" and logs/info appropriately,
re-raises unexpected ResponseError, and the final generic except logs and
re-raises the exception so semantics of ResponseError and Exception handling
(ResponseError, logging calls, and raise statements) remain unchanged.
1 participant
#259
📝 Description
Refactored index initialization in the
Graphclass to replace broadtry-except: passblocks with specialized error handling for FalkorDB v1.0.10. By targetingredis.exceptions.ResponseError, the system now differentiates between expected "index already exists" scenarios and critical database failures (e.g., connectivity or auth issues), improving overall observability and debugging.🔧 Changes Made
passblocks with a reusable_safe_create_indexhelper.redis.exceptions.ResponseErrorto prevent masking critical system failures.DEBUGfor success andINFOfor existing indices to improve observability.redis-pyexception imports to match the FalkorDB v1.0.10 architecture.📷 Screenshots or Visual Changes (if applicable)
(Drag and drop your terminal screenshot here)
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