1 00:00:00,240 --> 00:00:08,039 Not bad, not bad in our current setup, we're nicely handling duplicate values as well as our own custom 2 00:00:08,039 --> 00:00:08,500 errors. 3 00:00:08,760 --> 00:00:14,190 So now, of course, we want to deal with those validation errors, which, of course, is the case. 4 00:00:14,190 --> 00:00:21,540 For example, in the off, when I'm registering the user and I'm right away passing in the body. 5 00:00:21,720 --> 00:00:29,250 So I'm not checking for email or password or name over here, I simply let the mongoose handle that. 6 00:00:29,640 --> 00:00:37,230 And the way we do that is pretty similar to what we have or here we simply want to set up the IF statement, 7 00:00:37,450 --> 00:00:39,060 then we'll have some kind of condition. 8 00:00:39,330 --> 00:00:42,650 In this case, we're going to be looking for validation error. 9 00:00:42,930 --> 00:00:47,970 And if that is the case again, we'll use one of the nifty JavaScript methods. 10 00:00:48,420 --> 00:00:49,140 In this case. 11 00:00:49,140 --> 00:00:50,340 We're not going to be looking for keys. 12 00:00:50,620 --> 00:00:52,380 We'll be looking for the values. 13 00:00:52,650 --> 00:00:58,950 And of course, we'll send back the nice response and not just throw out let's just go back again to 14 00:00:58,950 --> 00:00:59,670 our postman. 15 00:00:59,880 --> 00:01:04,440 And I'm not going to do that in Log-in because again and here we have our custom one. 16 00:01:04,569 --> 00:01:08,640 The battle question when I want to do is go back to the registered user. 17 00:01:09,220 --> 00:01:12,930 And here I want to remove both the email and a password. 18 00:01:13,410 --> 00:01:19,440 And yes, I'm purposely removing both just so I can clearly see our functionality in action. 19 00:01:19,710 --> 00:01:23,820 And once we do that, once we send I mean, we can still see five hundred. 20 00:01:24,330 --> 00:01:26,400 So that just means internal server error. 21 00:01:26,820 --> 00:01:30,140 But the message is already more user friendly, correct? 22 00:01:30,390 --> 00:01:34,340 We already have user validation, failed password and blah blah, blah. 23 00:01:34,560 --> 00:01:39,930 So let me show you the entire object just so you can understand the functionality we're about to set 24 00:01:39,930 --> 00:01:40,800 up better. 25 00:01:41,130 --> 00:01:47,190 And technically, I don't even need to comment this one out because if I have my first return, of course, 26 00:01:47,470 --> 00:01:48,640 this is what we'll send back. 27 00:01:48,660 --> 00:01:51,570 So let me go back to the postman, send it one more time. 28 00:01:51,750 --> 00:01:57,840 And of course, this is going to be that giant object that we're getting back and the structure is following 29 00:01:58,230 --> 00:02:00,180 where we have this errors object. 30 00:02:00,450 --> 00:02:05,420 And of course, in here we'll have all the values that are missing. 31 00:02:05,700 --> 00:02:08,960 So, of course, in our case, that is password and the email. 32 00:02:09,180 --> 00:02:15,030 And this is very, very important because, of course, if you have only one, then technically you 33 00:02:15,030 --> 00:02:17,190 don't need to worry about multiple keys. 34 00:02:17,370 --> 00:02:19,010 But that's not our scenario. 35 00:02:19,260 --> 00:02:25,590 So in our case, we do need to worry about multiple keys in that object because maybe the password, 36 00:02:25,590 --> 00:02:27,450 email and name might be missing. 37 00:02:27,840 --> 00:02:35,130 And also in that object, in the error object, not only we have errors, we also have to name and essentially 38 00:02:35,130 --> 00:02:39,900 in our F block, we just want to check whether it is a validation error. 39 00:02:40,290 --> 00:02:45,270 So let's go back and I'm going to do that above the duplicate one. 40 00:02:45,270 --> 00:02:52,170 But of course, the position doesn't really matter where l say our name if it is equal to the validation 41 00:02:52,170 --> 00:02:52,410 error. 42 00:02:52,710 --> 00:02:55,590 So let's go over here with validation error. 43 00:02:55,860 --> 00:03:00,080 And if you need to copy and paste just so you don't make some silly typos. 44 00:03:00,480 --> 00:03:03,630 So essentially if you're like me and of course you can do that. 45 00:03:03,630 --> 00:03:04,770 So let's copy and paste. 46 00:03:05,100 --> 00:03:14,640 And if that is the case, then what I want to do is get all the values for the keys in the errors object. 47 00:03:15,000 --> 00:03:22,920 So notice, of course I have the password correct or I have the email and we want to do grab this errors 48 00:03:22,920 --> 00:03:31,290 one and just get the actual values of these objects because errors is an object itself then password 49 00:03:31,290 --> 00:03:33,060 and email or object. 50 00:03:33,330 --> 00:03:37,950 So I'm looking for the actual values in there and you'll see what I mean. 51 00:03:38,210 --> 00:03:46,560 Second, so if error name is equal to validation error, then let's just go with custom error and we're 52 00:03:46,560 --> 00:03:47,670 going to be looking for the message. 53 00:03:47,880 --> 00:03:54,420 And like I said, we're going to go object and values and then we'll pass in the error and errors. 54 00:03:54,810 --> 00:03:58,710 So in the error object, of course there is errors object. 55 00:03:58,980 --> 00:04:07,050 And in there I have two more keys, password and email and I want to turn them into array and then I 56 00:04:07,050 --> 00:04:08,850 want to iterate over using map. 57 00:04:08,850 --> 00:04:14,010 So since we're getting back the error, of course I can use my map method and I'm just going to call 58 00:04:14,010 --> 00:04:14,610 this item. 59 00:04:14,610 --> 00:04:18,990 So each and every item I'll call the item and then I'll say item that message. 60 00:04:19,290 --> 00:04:25,350 So here you'll notice that of course, in there, in that values, I have a message property. 61 00:04:25,710 --> 00:04:26,160 Correct. 62 00:04:26,490 --> 00:04:29,970 And then I want to access it and send it back. 63 00:04:30,330 --> 00:04:38,550 So let's say here, item that message and then we'll just join it back to the string and add a comma. 64 00:04:38,730 --> 00:04:39,900 So that's going to be our message. 65 00:04:40,200 --> 00:04:42,600 Now, as far as that is code again for Hunter. 66 00:04:42,900 --> 00:04:50,470 So let's go here with custom error and we're looking for status code and I'll be equal to four hundred. 67 00:04:50,670 --> 00:04:57,690 So once we save and once we send it back now of course, we should get a better response, but of course 68 00:04:57,690 --> 00:04:58,050 we don't. 69 00:04:58,050 --> 00:04:59,940 Because I mean, I left my. 70 00:05:00,020 --> 00:05:01,070 First response in as. 71 00:05:01,550 --> 00:05:07,100 So let me comment this sucker out and then send it here and now, of course, to have police provide 72 00:05:07,100 --> 00:05:13,490 password, please provide email, which effectively is way more user friendly than the object that we're 73 00:05:13,490 --> 00:05:14,090 sending back. 74 00:05:14,300 --> 00:05:16,550 And also notice of the status code. 75 00:05:16,760 --> 00:05:19,430 Of course, now we're sending back four hundred. 76 00:05:19,700 --> 00:05:25,490 And if you're confused about the code, just go back to the error handler and just log what you're getting 77 00:05:25,490 --> 00:05:26,030 back from. 78 00:05:26,330 --> 00:05:29,690 Object that vollers and it will make total sense. 79 00:05:29,890 --> 00:05:33,260 So essentially a map and join will make total sense. 80 00:05:33,440 --> 00:05:34,610 So let's try it over here. 81 00:05:34,880 --> 00:05:39,530 We'll go console log and then we're looking for object dot values. 82 00:05:39,740 --> 00:05:41,800 And then here we want to pass in error. 83 00:05:41,870 --> 00:05:46,090 So the arrow object and then more specifically, the error subject. 84 00:05:46,370 --> 00:05:47,510 So let's save it. 85 00:05:47,790 --> 00:05:50,410 And back in a postman, we want to send it. 86 00:05:50,410 --> 00:05:56,420 Of course response doesn't change, but in my terminal I can clearly see that what I'm getting back 87 00:05:56,420 --> 00:06:05,690 from object dot values is array of object and then iterating over that array and then more specifically 88 00:06:05,960 --> 00:06:11,960 in each object I'm accessing the message and then I just join all of them together. 89 00:06:11,960 --> 00:06:16,200 So I set it back to the string and then I just add comma in between. 90 00:06:16,490 --> 00:06:18,420 And once we have all of this in place. 91 00:06:18,860 --> 00:06:24,470 Now, of course, we can worry about our third instance and that's going to be the cast error.