WEBVTT 00:03.730 --> 00:05.290 Hey there everyone that they share. 00:05.290 --> 00:10.600 And the previous video we saw that how we can have a simple method which can help us to add a review 00:10.600 --> 00:14.260 and technically it is also acting as updating the review as well. 00:14.260 --> 00:19.630 So add an update are happening all in the same case and we don't need to give any put request or anything 00:19.630 --> 00:21.310 if somebody sends us just the post data. 00:21.310 --> 00:23.050 We are managing everything on here. 00:23.170 --> 00:27.550 Now, further down the road, I would like to have a delete method as well, so let's go ahead and have 00:27.550 --> 00:28.600 a copy of this one. 00:28.600 --> 00:37.300 So I'll just copy this and I'll say give me a paste of that and let's go ahead and shrink this one and 00:37.300 --> 00:37.870 add this one. 00:37.870 --> 00:41.470 So this one is going to be delete a review or delete review in simple. 00:41.770 --> 00:44.460 So this one is delete review. 00:44.470 --> 00:44.680 Okay. 00:44.710 --> 00:46.450 Let's see how we're going to work with that. 00:46.450 --> 00:51.550 Now again, of course, you are not going to send me this much of the information you would either be 00:51.550 --> 00:56.920 sending me just the product ID now how we're going to product, how we expect the product idea to come 00:56.920 --> 01:01.480 up to us if it comes in the requested body, that is also fine. 01:01.480 --> 01:06.610 But you are going to notice in such cases, especially for the delete, it is kind of a recommended 01:06.610 --> 01:09.580 that you come up or you just get that into the query. 01:09.820 --> 01:14.680 So we're going to go ahead and say request or query DOT product ID, okay, we have extracted that and 01:14.680 --> 01:16.720 now we have access to this product ID again. 01:16.720 --> 01:20.920 Now again, if you want to access that in the params, totally a new query totally on you. 01:20.920 --> 01:23.530 You just have to convey this information to the front end guy. 01:23.800 --> 01:28.210 We don't need to construct an object like this because that's not necessary. 01:28.210 --> 01:28.990 So there we go. 01:29.260 --> 01:35.860 Now, obviously, we need to find a product based on this product ID, however you are receiving doesn't 01:35.860 --> 01:36.730 really matter. 01:36.880 --> 01:37.240 Okay. 01:37.240 --> 01:41.590 Once I have gotten access to this one, now I need to update the reviews itself. 01:41.590 --> 01:43.510 So let's go ahead and use a simple method. 01:43.570 --> 01:47.040 I'm going to go ahead and say, hey, I will construct this reviews area. 01:47.050 --> 01:52.300 The goal or what I'm trying to do here is I have this access to this reviews entire array. 01:52.300 --> 01:56.680 I want to use a filter method and filter out the review which is being sent by that user. 01:56.680 --> 01:57.910 That's all I'm trying to do. 01:58.030 --> 01:59.770 So I'll be using the same method here. 01:59.770 --> 02:04.150 So I'll be saying that, hey, reviews, let's go ahead and update that just like this. 02:04.270 --> 02:11.500 And let's go ahead and say, hey, product dot reviews and let's use a filter method on that filter. 02:11.530 --> 02:12.220 There we go. 02:12.520 --> 02:17.980 Now filter actually goes and gives you again the same option that let's go ahead and call this one as 02:17.980 --> 02:21.940 simple rev this time and this is going to work exactly same. 02:21.940 --> 02:25.630 So we can actually go ahead and use this exact same line just like that. 02:25.930 --> 02:30.370 Now Rev works, this filter actually works a little bit different than the other methods. 02:30.550 --> 02:35.890 It actually allows to pass on all the values, but wherever the value or the condition matches out, 02:35.890 --> 02:38.140 it doesn't allow you to pass that thing. 02:38.140 --> 02:44.080 So the object we are looping through all the values, the object on which the review matches. 02:44.080 --> 02:45.670 That means this is the review by the user. 02:45.670 --> 02:48.490 It will not allow it to pass that. 02:48.490 --> 02:55.090 So now we have a reviews, a new fresh error, which is not having the values which we are supposed 02:55.090 --> 02:55.600 to delete. 02:55.600 --> 02:58.060 So that's exactly what we want to save in the database. 02:58.390 --> 03:02.290 We don't want this entirety of the stuff and F and LS and all of that. 03:02.290 --> 03:03.790 So let's go ahead and remove that part. 03:03.790 --> 03:04.810 We don't need that. 03:05.080 --> 03:05.520 Okay. 03:06.070 --> 03:07.600 Now I have this reviews. 03:07.600 --> 03:11.830 I obviously have to adjust these ratings and stuff, which I just deleted. 03:11.830 --> 03:15.730 And the only part that got deleted in that is this number of reviews. 03:15.730 --> 03:17.500 So let's copy that and update that. 03:17.500 --> 03:23.530 So let's go ahead and say, hey, now we have this number of reviews and that will be calculated from 03:23.530 --> 03:28.900 this fresh reviews that we got after filtering and we can actually go ahead and calculator length on 03:28.900 --> 03:31.960 that, if I can write that properly. 03:31.960 --> 03:32.740 There we go. 03:33.100 --> 03:33.350 Okay. 03:33.370 --> 03:39.550 So this is all updated number of reviews and we got this rating as well. 03:39.550 --> 03:41.590 So rating is accumulation fine. 03:41.590 --> 03:43.120 So this is again recalculated. 03:43.120 --> 03:44.770 That is absolutely fine. 03:44.800 --> 03:46.420 I'm happy with that part. 03:46.450 --> 03:48.970 Now all I need to do is insert a product dot save. 03:48.970 --> 03:54.730 I have to update the data because remember we are having a lot of reviews and all those a number of 03:54.730 --> 03:55.900 ratings and all these data. 03:55.900 --> 03:57.940 So let's go ahead and work on with that. 03:58.180 --> 04:00.280 So I'll remove this part. 04:00.760 --> 04:01.420 Let's go ahead. 04:01.420 --> 04:06.340 And instead of save, it would be better to say that update the product. 04:08.740 --> 04:09.820 Product. 04:09.820 --> 04:10.480 There we go. 04:10.900 --> 04:11.160 Okay. 04:11.170 --> 04:15.370 So how we're going to you update that again, this is a database operation and we're going to go ahead 04:15.370 --> 04:18.490 and use simple product model itself. 04:18.820 --> 04:23.830 And it has a property of find by ID and update. 04:23.830 --> 04:24.550 There we go. 04:24.910 --> 04:29.110 Now, first, we need to provide the ID itself and we are holding that ID in available. 04:29.120 --> 04:31.210 So there we go, product ID. 04:31.210 --> 04:33.100 Let's go ahead and copy that. 04:34.850 --> 04:35.600 Copy that. 04:35.600 --> 04:37.250 And I'll give you this product ID. 04:37.280 --> 04:37.910 There we go. 04:37.940 --> 04:42.290 Now, I need to provide you the data that you should be updating, and that data is actually inside 04:42.290 --> 04:43.610 an object itself. 04:43.640 --> 04:46.550 So what are the data that you should be updating first? 04:46.550 --> 04:51.860 You should be updating the reviews, so update that, then you should be updating the ratings because 04:51.860 --> 04:54.860 I have recalculated that ratings. 04:55.160 --> 04:57.350 Ratings and what else? 04:57.380 --> 04:58.640 A number of reviews also. 04:58.640 --> 04:59.990 So go ahead and update that. 04:59.990 --> 05:02.780 So these are the three things that needs to be updated there. 05:03.740 --> 05:05.960 So this is all happy. 05:06.380 --> 05:09.500 Now, also, we need to pass on the previous options as well. 05:09.500 --> 05:12.570 So this is all there and there we go. 05:12.590 --> 05:14.330 Now let's provide the options as well. 05:14.330 --> 05:16.690 So do we want the new value to be returned? 05:16.700 --> 05:17.960 Yes, definitely. 05:18.260 --> 05:20.600 We want run validators as well. 05:20.690 --> 05:22.370 Run validators. 05:22.790 --> 05:23.270 Yep. 05:23.270 --> 05:24.620 I want to do that. 05:25.640 --> 05:30.920 And also optionally again, use, find and modify. 05:32.290 --> 05:32.790 There we go. 05:32.800 --> 05:34.780 I want to turn off this flag as well. 05:35.050 --> 05:36.070 Let's save this. 05:36.070 --> 05:37.630 So we are having product by it. 05:37.660 --> 05:43.090 We are providing what product to update, what with, what data to update and optional, some of the 05:43.090 --> 05:44.200 options going in. 05:44.260 --> 05:47.770 Now, again, the response is pretty obvious and pretty good as well. 05:47.990 --> 05:48.230 Okay. 05:48.250 --> 05:52.510 So this is the basic method of how we are actually getting that and these are the only things we need 05:52.510 --> 05:53.230 to worry about. 05:53.230 --> 05:56.200 And basically we need to give us a method itself. 05:56.230 --> 06:00.700 Now, optionally, we are going to design one more method because here is the situation for that. 06:00.790 --> 06:06.280 Although whenever we are sending an individual product response, we are sending all the data through 06:06.280 --> 06:10.950 it, we are sending up what all the reviews are, what all the ratings and everything is. 06:10.960 --> 06:15.070 And technically, we shouldn't be sending the repetitive or iterative data when somebody in the front 06:15.070 --> 06:16.150 end can grab it, actually. 06:16.150 --> 06:20.650 But maybe, maybe for some reason in the front end, Guy has asked that, Hey, can you give me a simple 06:20.650 --> 06:24.610 method in which if I provide you product ID, you just return me all the reviews. 06:24.610 --> 06:27.610 It would be easier to display all the reviews in a separate component. 06:27.610 --> 06:30.580 So we are going to design a method for him just for that. 06:30.580 --> 06:35.980 And this is just to explain the stuff that yes, sometimes user or front end guy may ask you that I 06:35.980 --> 06:37.840 don't want the entirety of the information. 06:37.840 --> 06:40.120 Just give me some selected data on some of the route. 06:40.120 --> 06:42.580 And yes, we can always go ahead and do that. 06:42.670 --> 06:48.040 So we're going to say and say that get only reviews. 06:50.340 --> 06:53.100 For one product. 06:53.100 --> 06:56.520 So yeah, this is a really long one, but this is how we are going to do it. 06:56.700 --> 07:01.320 We're going to say that this is going to be wrapping around Big Promise and we're going to say request 07:01.320 --> 07:04.590 a response and the next just like that. 07:04.590 --> 07:05.520 There we go. 07:06.600 --> 07:09.450 And seems like there is a little bit of the issue. 07:09.630 --> 07:13.110 Yep, there is a little bit of issue too fast. 07:13.110 --> 07:13.980 There we go. 07:14.370 --> 07:18.180 And I need to wrap everything around the big promise. 07:18.510 --> 07:19.020 There we go. 07:19.020 --> 07:23.580 That's why I usually copy and paste this stuff and this needs to be going a sync. 07:25.900 --> 07:33.130 And after the async, this needs to be wrapped around like that and then I can fire my callback. 07:33.850 --> 07:38.770 OC looks good now, so we're going to go ahead and say that, hey, you need to send me somehow the 07:38.770 --> 07:41.080 ID of that product, of that one product. 07:41.080 --> 07:44.440 So let's just say we're going to hold that into a product. 07:44.920 --> 07:49.180 And how that is going to come up is up to you and how you talk to the front end guy. 07:49.210 --> 07:51.100 Really, we don't really matter that much. 07:51.100 --> 07:56.680 We have mastered that art already, so we're going to say, fine, buy ID and go ahead and just change 07:56.680 --> 07:57.670 it in case things changes. 07:57.670 --> 08:00.550 I'm going to say that, hey, let's go ahead and grab it into the query. 08:00.550 --> 08:05.560 So request dot, query, dot ID or you can call this one as product ID however you like to go ahead 08:05.560 --> 08:06.370 and use that. 08:06.640 --> 08:09.400 Now we have this product, we are holding that. 08:09.400 --> 08:12.160 So let's go ahead and send just only the reviews there. 08:12.160 --> 08:13.090 So it's really simple. 08:13.090 --> 08:20.620 We are going to say Rez dot status and we are going to go ahead and say 200 and let's send it JSON response. 08:20.620 --> 08:21.370 There we go. 08:21.370 --> 08:25.420 In the JSON response, we are going to say success is true in this case. 08:25.570 --> 08:33.760 And the reviews, which is an error itself, is going to come up from the product DOT reviews. 08:33.760 --> 08:34.420 There we go. 08:34.450 --> 08:40.420 Make sure it is a TSS reviews and that's all what we got to do now in case somebody in the frontend 08:40.420 --> 08:45.340 guy comes up and say, Hey, I need a specific model, I'm designing a special component in which just 08:45.340 --> 08:46.750 the brand names are coming in. 08:46.750 --> 08:50.890 So hey, can you send me just specifically the brand name or just the category up there? 08:50.890 --> 08:52.510 You can go ahead and design those method. 08:52.510 --> 08:54.760 And yes, these requests are very, very common. 08:54.760 --> 08:56.290 They come up quite a lot. 08:56.320 --> 08:57.100 In the next video. 08:57.100 --> 09:01.810 We're going to go ahead and design the routes for that because we haven't yet implemented them in the 09:01.810 --> 09:02.080 route. 09:02.080 --> 09:03.910 Let's go ahead and catch up in the next video.