Fixed #348 - delete database results in error

src/main/java/de/deadlocker8/budgetmaster/entities/Tag.java

@@ -62,7 +62,10 @@ public class Tag
 	@Override
 	public String toString()
 	{
-		return "Tag{ID=" + ID +	", name='" + name + '}';
+		return "Tag{" +
+				"ID=" + ID +
+				", name='" + name + '\'' +
+				'}';
 	}
 
 	@Override
@@ -78,7 +81,6 @@ public class Tag
 	@Override
 	public int hashCode()
 	{
-
 		return Objects.hash(ID, name);
 	}
 }
\ No newline at end of file

src/main/java/de/deadlocker8/budgetmaster/services/TransactionService.java

@@ -111,6 +111,12 @@ public class TransactionService implements Resetable
 	public void deleteTransaction(Integer ID)
 	{
 		if(isDeletable(ID))
+		{
+			deleteTransactionInRepo(ID);
+		}
+	}
+
+	private void deleteTransactionInRepo(Integer ID)
 	{
 		Transaction transactionToDelete = transactionRepository.findOne(ID);
 		// handle repeating transactions
@@ -123,7 +129,6 @@ public class TransactionService implements Resetable
 			transactionRepository.delete(ID);
 		}
 	}
-	}
 
 	public boolean isDeletable(Integer ID)
 	{
@@ -134,7 +139,10 @@ public class TransactionService implements Resetable
 	@Override
 	public void deleteAll()
 	{
-		transactionRepository.deleteAll();
+		for(Transaction transaction : transactionRepository.findAll())
+		{
+			deleteTransactionInRepo(transaction.getID());
+		}
 	}
 
 	@Override