1 00:00:08,100 --> 00:00:13,200 Welcome to brand new section, and that is Mongoose. 2 00:00:13,770 --> 00:00:19,710 Well, if you are new to web development, this will be your state. 3 00:00:20,370 --> 00:00:26,880 You may be thinking that are we going to learn a new programming language or a new database? 4 00:00:26,910 --> 00:00:29,910 The answer is no. 5 00:00:30,060 --> 00:00:36,190 But instead, it is going to make our life easier as web developers. 6 00:00:36,210 --> 00:00:38,950 So what is Mongoose? 7 00:00:38,970 --> 00:00:49,440 So let's understand that Mongoose is a Node.js module that provides an object data modeling called ODM 8 00:00:49,440 --> 00:00:52,290 interface for MongoDB. 9 00:00:52,620 --> 00:00:59,550 So it simply means that this is a tool for us to interact with MongoDB. 10 00:00:59,580 --> 00:01:01,410 Pretty easy. 11 00:01:01,920 --> 00:01:09,240 So if you remember, after we learned what is called Node.js, then we learned what is called Express 12 00:01:09,240 --> 00:01:11,940 JS and we saw the differences. 13 00:01:12,170 --> 00:01:19,260 Express JS Help us to write Node.js code or service or application in the easiest way. 14 00:01:19,590 --> 00:01:25,350 So Mongoose help us to work with MongoDB in the easiest way. 15 00:01:25,380 --> 00:01:28,860 So what is Mongoose and not share? 16 00:01:29,040 --> 00:01:35,160 Well, like I said, Mongoose was built on top of MongoDB. 17 00:01:35,190 --> 00:01:41,520 So if you write Mongoose code, indirectly we are running MongoDB code. 18 00:01:41,730 --> 00:01:49,920 So in a nutshell, Mongoose help us to interact with MongoDB in the easiest way. 19 00:01:50,070 --> 00:01:52,950 So why Mongoose in that way? 20 00:01:52,950 --> 00:01:56,820 You better understand why we need mongoose. 21 00:01:56,970 --> 00:02:03,560 Well, the first point is that it is the easiest way to model data. 22 00:02:03,570 --> 00:02:08,070 And we have dedicated video to talk about data modeling. 23 00:02:08,400 --> 00:02:17,460 For example, let's say that we have a block application where a user can create a post and a user can 24 00:02:17,460 --> 00:02:18,810 create a comment. 25 00:02:19,050 --> 00:02:25,450 So let's say that we want to find a post that has been created by a particular user. 26 00:02:25,470 --> 00:02:27,180 How are we going to do it? 27 00:02:27,390 --> 00:02:34,950 So if we are using MongoDB to get this logic done, we need to play around with MongoDB a lot, but 28 00:02:34,950 --> 00:02:39,270 with Mongoose is going to help us to model data easily. 29 00:02:39,390 --> 00:02:46,470 And after that, it is also the easiest way to access MongoDB collections. 30 00:02:46,860 --> 00:02:48,090 Do you remember? 31 00:02:48,090 --> 00:02:58,800 And MongoDB to be able to interact with the collection first unless we install the MongoDB drivers and 32 00:02:58,800 --> 00:03:04,800 next is we connect and next is we select the database and then the collection. 33 00:03:04,800 --> 00:03:08,910 And after that we can go ahead and interact with the collection. 34 00:03:09,270 --> 00:03:15,780 But with Mongoose, you're going to be pretty easy to get that one done and we will see as we move on. 35 00:03:16,080 --> 00:03:24,180 The next step is that it validate documents before they are inserted into a collection. 36 00:03:24,480 --> 00:03:31,830 So looking at this one, you can see that for this one to be able to implement validation on less, 37 00:03:31,830 --> 00:03:33,420 we do it by ourselves. 38 00:03:33,810 --> 00:03:38,010 So let's say that we are implementing this one in a route. 39 00:03:38,010 --> 00:03:42,030 So always we need to check the payload that is coming in. 40 00:03:42,150 --> 00:03:49,140 If the title of a certain post is more than this or it's an empty, then we can catch the error before 41 00:03:49,140 --> 00:03:51,150 it gets to the MongoDB. 42 00:03:51,480 --> 00:03:55,920 But with Mongoose, it's going to be pretty easy to get that. 43 00:03:55,980 --> 00:03:56,640 And then. 44 00:03:56,640 --> 00:03:58,470 So let's get going. 45 00:03:58,830 --> 00:04:08,430 The next step is it provides advanced custom data types or plugins, meaning that we can extend mongoose 46 00:04:08,430 --> 00:04:09,480 functionality. 47 00:04:09,630 --> 00:04:15,290 So behind the scene we are extending the MongoDB functionality. 48 00:04:15,300 --> 00:04:23,940 We can add our custom method, which is not part of the core method that has been shipped in with MongoDB. 49 00:04:24,090 --> 00:04:29,960 So the next point is that it is the most popular ODM libraries for Node.js. 50 00:04:29,970 --> 00:04:34,170 So ODM simply means object document model. 51 00:04:34,410 --> 00:04:41,250 And it will see that when we get into Mongoose, you can see the number of downloads per week and it 52 00:04:41,250 --> 00:04:43,200 has large community. 53 00:04:43,200 --> 00:04:47,930 So in case you face any bug you're going to find easy on the internet. 54 00:04:47,940 --> 00:04:50,760 That's why Mongoose is awesome. 55 00:04:50,910 --> 00:04:59,850 But before you understand Mongoose, unless you understand two technical term core schema and model, 56 00:05:00,030 --> 00:05:01,140 then this video. 57 00:05:01,140 --> 00:05:02,850 Let's talk about schema.