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fix(api): resolve duplicate transactions with composite key migration

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- Migrate transactions table to use (accountId, transactionId) composite primary key
- Replace unstable internalTransactionId with stable bank-provided transactionId
- Update persistence logic to use INSERT OR REPLACE for automatic conflict resolution
- Maintain API compatibility by preserving internalTransactionId field
- Update tests to match new transaction processing format

This resolves the issue where GoCardless returns different internalTransactionId
values for the same transaction across sync operations, causing duplicates.
This commit is contained in:
Elisiário Couto
2025-09-10 20:00:43 +01:00
parent 433ba3faf9
commit 13e92ccd34
2 changed files with 205 additions and 25 deletions
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15
tests/unit/test_database_service.py
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@@ -18,6 +18,8 @@ def sample_transactions_db_format():
"""Sample transactions in database format."""
return [
{
"accountId": "test-account-123",
"transactionId": "txn-001",
"internalTransactionId": "txn-001",
"institutionId": "REVOLUT_REVOLT21",
"iban": "LT313250081177977789",
@@ -26,10 +28,11 @@ def sample_transactions_db_format():
"transactionValue": -10.50,
"transactionCurrency": "EUR",
"transactionStatus": "booked",
"accountId": "test-account-123",
"rawTransaction": {"some": "data"},
"rawTransaction": {"transactionId": "txn-001", "some": "data"},
},
{
"accountId": "test-account-123",
"transactionId": "txn-002",
"internalTransactionId": "txn-002",
"institutionId": "REVOLUT_REVOLT21",
"iban": "LT313250081177977789",
@@ -38,8 +41,7 @@ def sample_transactions_db_format():
"transactionValue": -45.30,
"transactionCurrency": "EUR",
"transactionStatus": "booked",
"accountId": "test-account-123",
"rawTransaction": {"other": "data"},
"rawTransaction": {"transactionId": "txn-002", "other": "data"},
},
]
@@ -351,6 +353,7 @@ class TestDatabaseService:
"booked": [
{
"internalTransactionId": "txn-001",
"transactionId": "txn-001",
"bookingDate": "2025-09-01",
"transactionAmount": {"amount": "-10.50", "currency": "EUR"},
"remittanceInformationUnstructured": "Coffee Shop",
@@ -359,6 +362,7 @@ class TestDatabaseService:
"pending": [
{
"internalTransactionId": "txn-002",
"transactionId": "txn-002",
"bookingDate": "2025-09-02",
"transactionAmount": {"amount": "-25.00", "currency": "EUR"},
"remittanceInformationUnstructured": "Gas Station",
@@ -375,12 +379,14 @@ class TestDatabaseService:
# Check booked transaction
booked_txn = next(t for t in result if t["transactionStatus"] == "booked")
assert booked_txn["transactionId"] == "txn-001"
assert booked_txn["internalTransactionId"] == "txn-001"
assert booked_txn["transactionValue"] == -10.50
assert booked_txn["description"] == "Coffee Shop"
# Check pending transaction
pending_txn = next(t for t in result if t["transactionStatus"] == "pending")
assert pending_txn["transactionId"] == "txn-002"
assert pending_txn["internalTransactionId"] == "txn-002"
assert pending_txn["transactionValue"] == -25.00
assert pending_txn["description"] == "Gas Station"
@@ -416,6 +422,7 @@ class TestDatabaseService:
"booked": [
{
"internalTransactionId": "txn-001",
"transactionId": "txn-001",
"bookingDate": "2025-09-01",
"transactionAmount": {"amount": "-10.50", "currency": "EUR"},
"remittanceInformationUnstructuredArray": ["Line 1", "Line 2"],