PP-7223 fix query bug

- fix query bug when joining payout table to transactions with no
  gateway account id is present

Author: SandorArpa

src/main/java/uk/gov/pay/ledger/transaction/dao/TransactionDao.java

@@ -15,7 +15,6 @@
 import java.util.function.BiConsumer;
 import java.util.stream.Collectors;
 
-import static org.apache.commons.lang3.StringUtils.isBlank;
 import static org.apache.commons.lang3.StringUtils.isNotBlank;
 
 public class TransactionDao {

src/test/java/uk/gov/pay/ledger/transaction/dao/TransactionDaoIT.java

@@ -105,6 +105,30 @@ public void shouldRetrieveTransactionByExternalIdAndGatewayAccount() {
         assertThat(retrievedTransaction.getPayoutEntity().get().getPaidOutDate(), is(paidOutDate));
     }
 
+    @Test
+    public void shouldRetrieveTransactionWithPayoutDateByExternalIdAndNoGatewayAccount() {
+        ZonedDateTime paidOutDate = ZonedDateTime.parse("2019-12-12T10:00:00Z");
+        String payOutId = randomAlphanumeric(20);
+
+        TransactionFixture fixture = aTransactionFixture()
+                .withDefaultCardDetails()
+                .withExternalMetadata(ImmutableMap.of("key1", "value1", "anotherKey", ImmutableMap.of("nestedKey", "value")))
+                .withDefaultTransactionDetails()
+                .withGatewayPayoutId(payOutId)
+                .insert(rule.getJdbi());
+        aPayoutFixture()
+                .withGatewayAccountId(fixture.getGatewayAccountId())
+                .withGatewayPayoutId(payOutId)
+                .withPaidOutDate(paidOutDate)
+                .build()
+                .insert(rule.getJdbi());
+
+        TransactionEntity retrievedTransaction = transactionDao.findTransactionByExternalId(fixture.getExternalId()).get();
+        
+        assertThat(retrievedTransaction.getPayoutEntity().isPresent(), is(true));
+        assertThat(retrievedTransaction.getPayoutEntity().get().getPaidOutDate(), is(paidOutDate));
+    }
+
     private void assertTransactionEntity(TransactionEntity transaction, TransactionFixture fixture) {
         assertThat(transaction.getId(), notNullValue());
         assertThat(transaction.getGatewayAccountId(), is(fixture.getGatewayAccountId()));

src/test/java/uk/gov/pay/ledger/transaction/dao/TransactionDaoSearchIT.java

@@ -769,6 +769,34 @@ public void shouldGetAndMapTransactionWithPaidOutDateCorrectly() {
         assertThat(total, is(1L));
     }
 
+    @Test
+    public void shouldGetAndMapTransactionWithPaidOutDateCorrectlyWhenNoGatewayAccount() {
+        String gatewayPayoutId = randomAlphanumeric(15);
+
+        transactionFixture = aTransactionFixture()
+                .withDefaultCardDetails()
+                .withMoto(true)
+                .withGatewayPayoutId(gatewayPayoutId)
+                .insert(rule.getJdbi());
+
+        var payoutFixture = aPayoutFixture()
+                .withGatewayAccountId(transactionFixture.getGatewayAccountId())
+                .withGatewayPayoutId(gatewayPayoutId)
+                .build()
+                .insert(rule.getJdbi())
+                .toEntity();
+
+        List<TransactionEntity> transactionList = transactionDao.searchTransactions(searchParams);
+
+        assertThat(transactionList.size(), Matchers.is(1));
+        TransactionEntity transaction = transactionList.get(0);
+
+        assertThat(transaction.getPayoutEntity().get().getPaidOutDate(), is(payoutFixture.getPaidOutDate()));
+
+        Long total = transactionDao.getTotalForSearch(searchParams);
+        assertThat(total, is(1L));
+    }
+
     @Test
     public void searchTransactionsByCursorWithPaidoutDate() {
         String gatewayPayoutId = randomAlphanumeric(15);