Merge pull request #465 from eitchtee/dev

fix: "lax" deduplication fails if the comparison field has a numeric value

app/apps/import_app/services/v1.py

@@ -459,12 +459,13 @@ class ImportService:
                 # Build query conditions for each field in the rule
                 for field in rule.fields:
                     if field in transaction_data:
-                        if rule.match_type == "strict":
-                            query = query.filter(**{field: transaction_data[field]})
-                        else:  # lax matching
-                            query = query.filter(
-                                **{f"{field}__iexact": transaction_data[field]}
-                            )
+                        value = transaction_data[field]
+                        # Use __iexact only for string fields; non-string types
+                        # (date, Decimal, bool, int, etc.) don't support UPPER()
+                        if rule.match_type == "strict" or not isinstance(value, str):
+                            query = query.filter(**{field: value})
+                        else:  # lax matching for strings only
+                            query = query.filter(**{f"{field}__iexact": value})
 
                 # If we found any matching transaction, it's a duplicate
                 if query.exists():

app/apps/import_app/tests.py

@@ -1,3 +0,0 @@
-from django.test import TestCase
-
-# Create your tests here.

app/apps/import_app/tests/test_import_service_v1.py

@@ -0,0 +1,276 @@
+"""
+Tests for ImportService v1, specifically for deduplication logic.
+
+These tests verify that the _check_duplicate_transaction method handles
+different field types correctly, particularly ensuring that __iexact
+is only used for string fields (not dates, decimals, etc.).
+"""
+
+from datetime import date
+from decimal import Decimal
+from unittest.mock import MagicMock, patch
+
+from django.test import TestCase
+
+from apps.accounts.models import Account, AccountGroup
+from apps.currencies.models import Currency
+from apps.import_app.models import ImportProfile, ImportRun
+from apps.import_app.services.v1 import ImportService
+from apps.transactions.models import Transaction
+
+
+class DeduplicationTests(TestCase):
+    """Tests for transaction deduplication during import."""
+
+    def setUp(self):
+        """Set up test data."""
+        self.currency = Currency.objects.create(
+            code="USD", name="US Dollar", decimal_places=2, prefix="$ "
+        )
+        self.account_group = AccountGroup.objects.create(name="Test Group")
+        self.account = Account.objects.create(
+            name="Test Account", group=self.account_group, currency=self.currency
+        )
+
+        # Create an existing transaction for deduplication tests
+        self.existing_transaction = Transaction.objects.create(
+            account=self.account,
+            type=Transaction.Type.EXPENSE,
+            date=date(2024, 1, 15),
+            amount=Decimal("100.00"),
+            description="Existing Transaction",
+            internal_id="ABC123",
+        )
+
+    def _create_import_service_with_deduplication(
+        self, fields: list[str], match_type: str = "lax"
+    ) -> ImportService:
+        """Helper to create an ImportService with specific deduplication rules."""
+        yaml_config = f"""
+settings:
+  file_type: csv
+  importing: transactions
+  trigger_transaction_rules: false
+mapping:
+  date_field:
+    source: date
+    target: date
+    format: "%Y-%m-%d"
+  amount_field:
+    source: amount
+    target: amount
+  description_field:
+    source: description
+    target: description
+  account_field:
+    source: account
+    target: account
+    type: id
+deduplication:
+  - type: compare
+    fields: {fields}
+    match_type: {match_type}
+"""
+        profile = ImportProfile.objects.create(
+            name=f"Test Profile {match_type} {'_'.join(fields)}",
+            yaml_config=yaml_config,
+            version=ImportProfile.Versions.VERSION_1,
+        )
+        import_run = ImportRun.objects.create(
+            profile=profile,
+            file_name="test.csv",
+        )
+        return ImportService(import_run)
+
+    def test_deduplication_with_date_field_strict_match(self):
+        """Test that date fields work with strict matching."""
+        service = self._create_import_service_with_deduplication(
+            fields=["date"], match_type="strict"
+        )
+
+        # Should find duplicate when date matches
+        is_duplicate = service._check_duplicate_transaction({"date": date(2024, 1, 15)})
+        self.assertTrue(is_duplicate)
+
+        # Should not find duplicate when date differs
+        is_duplicate = service._check_duplicate_transaction({"date": date(2024, 2, 20)})
+        self.assertFalse(is_duplicate)
+
+    def test_deduplication_with_date_field_lax_match(self):
+        """
+        Test that date fields use strict matching even when match_type is 'lax'.
+
+        This is the fix for the UPPER(date) PostgreSQL error. Date fields
+        cannot use __iexact, so they should fall back to strict matching.
+        """
+        service = self._create_import_service_with_deduplication(
+            fields=["date"], match_type="lax"
+        )
+
+        # Should find duplicate when date matches (using strict comparison)
+        is_duplicate = service._check_duplicate_transaction({"date": date(2024, 1, 15)})
+        self.assertTrue(is_duplicate)
+
+        # Should not find duplicate when date differs
+        is_duplicate = service._check_duplicate_transaction({"date": date(2024, 2, 20)})
+        self.assertFalse(is_duplicate)
+
+    def test_deduplication_with_amount_field_lax_match(self):
+        """
+        Test that Decimal fields use strict matching even when match_type is 'lax'.
+
+        Decimal fields cannot use __iexact, so they should fall back to strict matching.
+        """
+        service = self._create_import_service_with_deduplication(
+            fields=["amount"], match_type="lax"
+        )
+
+        # Should find duplicate when amount matches
+        is_duplicate = service._check_duplicate_transaction(
+            {"amount": Decimal("100.00")}
+        )
+        self.assertTrue(is_duplicate)
+
+        # Should not find duplicate when amount differs
+        is_duplicate = service._check_duplicate_transaction(
+            {"amount": Decimal("200.00")}
+        )
+        self.assertFalse(is_duplicate)
+
+    def test_deduplication_with_string_field_lax_match(self):
+        """
+        Test that string fields use case-insensitive matching with match_type 'lax'.
+        """
+        service = self._create_import_service_with_deduplication(
+            fields=["description"], match_type="lax"
+        )
+
+        # Should find duplicate with case-insensitive match
+        is_duplicate = service._check_duplicate_transaction(
+            {"description": "EXISTING TRANSACTION"}
+        )
+        self.assertTrue(is_duplicate)
+
+        # Should find duplicate with exact case match
+        is_duplicate = service._check_duplicate_transaction(
+            {"description": "Existing Transaction"}
+        )
+        self.assertTrue(is_duplicate)
+
+        # Should not find duplicate when description differs
+        is_duplicate = service._check_duplicate_transaction(
+            {"description": "Different Transaction"}
+        )
+        self.assertFalse(is_duplicate)
+
+    def test_deduplication_with_string_field_strict_match(self):
+        """
+        Test that string fields use case-sensitive matching with match_type 'strict'.
+        """
+        service = self._create_import_service_with_deduplication(
+            fields=["description"], match_type="strict"
+        )
+
+        # Should NOT find duplicate with different case (strict matching)
+        is_duplicate = service._check_duplicate_transaction(
+            {"description": "EXISTING TRANSACTION"}
+        )
+        self.assertFalse(is_duplicate)
+
+        # Should find duplicate with exact case match
+        is_duplicate = service._check_duplicate_transaction(
+            {"description": "Existing Transaction"}
+        )
+        self.assertTrue(is_duplicate)
+
+    def test_deduplication_with_multiple_fields_mixed_types(self):
+        """
+        Test deduplication with multiple fields of different types.
+
+        Verifies that string fields use __iexact while non-string fields
+        use strict matching, all in the same deduplication rule.
+        """
+        service = self._create_import_service_with_deduplication(
+            fields=["date", "amount", "description"], match_type="lax"
+        )
+
+        # Should find duplicate when all fields match (with case-insensitive description)
+        is_duplicate = service._check_duplicate_transaction(
+            {
+                "date": date(2024, 1, 15),
+                "amount": Decimal("100.00"),
+                "description": "existing transaction",  # lowercase should match
+            }
+        )
+        self.assertTrue(is_duplicate)
+
+        # Should NOT find duplicate when date differs
+        is_duplicate = service._check_duplicate_transaction(
+            {
+                "date": date(2024, 2, 20),
+                "amount": Decimal("100.00"),
+                "description": "existing transaction",
+            }
+        )
+        self.assertFalse(is_duplicate)
+
+        # Should NOT find duplicate when amount differs
+        is_duplicate = service._check_duplicate_transaction(
+            {
+                "date": date(2024, 1, 15),
+                "amount": Decimal("999.99"),
+                "description": "existing transaction",
+            }
+        )
+        self.assertFalse(is_duplicate)
+
+    def test_deduplication_with_internal_id_lax_match(self):
+        """Test deduplication with internal_id field using lax matching."""
+        service = self._create_import_service_with_deduplication(
+            fields=["internal_id"], match_type="lax"
+        )
+
+        # Should find duplicate with case-insensitive match
+        is_duplicate = service._check_duplicate_transaction(
+            {"internal_id": "abc123"}  # lowercase should match ABC123
+        )
+        self.assertTrue(is_duplicate)
+
+        # Should find duplicate with exact match
+        is_duplicate = service._check_duplicate_transaction({"internal_id": "ABC123"})
+        self.assertTrue(is_duplicate)
+
+        # Should not find duplicate when internal_id differs
+        is_duplicate = service._check_duplicate_transaction({"internal_id": "XYZ789"})
+        self.assertFalse(is_duplicate)
+
+    def test_no_duplicate_when_no_transactions_exist(self):
+        """Test that no duplicate is found when there are no matching transactions."""
+        # Hard delete to bypass signals that require user context
+        self.existing_transaction.hard_delete()
+
+        service = self._create_import_service_with_deduplication(
+            fields=["date", "amount"], match_type="lax"
+        )
+
+        is_duplicate = service._check_duplicate_transaction(
+            {
+                "date": date(2024, 1, 15),
+                "amount": Decimal("100.00"),
+            }
+        )
+        self.assertFalse(is_duplicate)
+
+    def test_deduplication_with_missing_field_in_data(self):
+        """Test that missing fields in transaction_data are handled gracefully."""
+        service = self._create_import_service_with_deduplication(
+            fields=["date", "nonexistent_field"], match_type="lax"
+        )
+
+        # Should still work, only checking the fields that exist
+        is_duplicate = service._check_duplicate_transaction(
+            {
+                "date": date(2024, 1, 15),
+            }
+        )
+        self.assertTrue(is_duplicate)