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‫So no matter if you installed MongoDB

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‫on Windows or on Mac OS, we will now create

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‫our first local database, using the Mongo Shell.

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‫So this terminal application which is the Mongo Shell

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‫works exactly the same on Windows and Mac,

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‫so from now on it doesn't matter anymore which

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‫platform you're using.

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‫So here in this terminal tab I still have

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‫my Mongo server basically running in the background

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‫on this port, and so let's go ahead and open up

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‫the Mongo Shell.

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‫So remember, that is just typing Mongo here

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‫in the command line and that will then open up

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‫the Mongo Shell, then Command K to clear the terminal,

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‫and so now let's actually create our first database.

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‫And we do that by using "use".

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‫So we use the "use" command inside the Mongo Shell,

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‫and then the name of the database that we want to create.

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‫Now this command here is also used to switch to

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‫a already existing database, but if we try

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‫to basically switch to a database that doesn't

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‫yet exist, it will then create a new one.

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‫So let's say, "use

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‫natours-

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‫test",

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‫okay.

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‫And so it created that database, and it also switched to it.

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‫Okay, and now this blank database

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‫is ready to receive some data.

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‫Now remember that inside a database we have collections,

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‫and then each collection has documents in it.

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‫And the data that we create in the Mongo Shell

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‫is always documents.

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‫And so of course we have to create the document

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‫inside of a collection, and so we specify that

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‫collection before we insert a document.

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‫And this works like this, so db, which stands

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‫for the current database, which is in this case

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‫natours-test, and then we specify the name of the collection

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‫which is tours, and then on that

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‫we use the insertMany function.

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‫So insertMany just like that, so just to recap here,

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‫Database is the currently used database that is

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‫right now active, and when we want to insert a

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‫document into it we need to specify the collection

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‫where that document is gonna live.

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‫And we do that by using dot, and then

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‫the name of the collection, which is in this case "tours".

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‫Now right now this collection hasn't been created,

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‫and so it will create it once we run this command, okay.

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‫And later on we will then have a collection for users,

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‫or for reviews, so basically for all the resources

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‫that we created in the last section, right.

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‫So, using tours here because that is one of our

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‫resources in our application, okay.

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‫But don't worry too much about that for now,

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‫we will talk about data modeling a bit later in the course.

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‫Okay, anyway, let's now actually insert a document

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‫into this database collection.

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‫And it's actually very simple.

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‫So, remember that MongoDb uses BSON,

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‫which is quite similar to JSON,

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‫so we can actually simply pass a JavaScript object

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‫into this insertMany function, and it will

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‫then convert it into JSON and BSON, okay.

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‫So a regular JavaScript object like this,

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‫and then just like before, let's define

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‫the name of the tour.

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‫And I'm calling it The Forest Hiker, which is

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‫one of the tours that we actually have in our JSON

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‫document at this point, so The Forest Hiker,

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‫let's set a price

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‫to

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‫297,

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‫and then also a rating, like an average rating,

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‫which can be 4.7

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‫okay.

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‫So this here looks like just a regular JavaScript object,

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‫now we could also use quotes on the property names,

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‫but that is actually optional, okay.

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‫Now here on these,

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‫and here we probably need the double quotes,

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‫okay so JSON does not recognize the single quotes,

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‫and so to be on the safe side

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‫let's just use the double quotes here, even though

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‫I usually like to use the single ones.

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‫And now just before we hit return, we actually need to

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‫also correct this function here, because it's not

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‫insertMany, because we're actually only inserting

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‫one document here,

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‫so it's called insertOne, okay.

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‫So we use insertMany to create multiple documents,

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‫and we use insertOne when we just wanna create one.

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‫Okay, so let's now hit return, and just like this

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‫we created our first document in our database.

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‫Okay, and now just to check that, let's use DB,

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‫which again is the current database, then .tours

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‫.find

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‫all right and here indeed is the document

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‫that we just created.

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‫And notice how it also automatically created

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‫this object ID here which is the unique identifier

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‫of this document.

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‫So remember how I said that MongoDB would automatically

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‫create these unique identifiers behind the scenes,

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‫and so that's exactly what you see here.

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‫And besides that, well, you see that this really

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‫is just a regular JSON object.

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‫And so this makes it great and really easy to work with

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‫JavaScript, and so as you can guess, this is going to

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‫make it really easy to work with MongoDB data in JavaScript.

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‫Because we're already using kind of the same format

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‫that we're already used to in JavaScript.

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‫And so that is one of the main reasons why MongoDB

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‫is so popular for Node JS applications.

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‫Okay, now another very useful command is show dbs,

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‫which will basically show us all the databases that we have

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00:05:44,090 --> 00:05:48,540
‫in MongoDB, and so here you see our natours-test database.

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00:05:48,540 --> 00:05:50,000
‫But we also have some other ones,

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‫which MongoDB automatically creates for us.

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00:05:52,570 --> 00:05:56,070
‫And yours might not be the same as these three,

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00:05:56,070 --> 00:05:58,810
‫but if not, don't worry, and just like before

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00:05:58,810 --> 00:06:02,710
‫we could use the "use" command to switch to one of these.

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00:06:02,710 --> 00:06:06,470
‫So let's say we now wanted to use admin, and so now

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00:06:06,470 --> 00:06:09,280
‫we switched to DB admin, all right.

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00:06:09,280 --> 00:06:12,800
‫So again, "use" is to switch to an existing database

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00:06:12,800 --> 00:06:15,210
‫or to create a new one, if the name that

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00:06:15,210 --> 00:06:17,293
‫we pass into it does not yet exist.

129
00:06:19,420 --> 00:06:22,667
‫So we want to go back to natours-test

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00:06:22,667 --> 00:06:24,840
‫because now I want to show you

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00:06:24,840 --> 00:06:27,370
‫just another quick command here,

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‫so "show collections".

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00:06:30,400 --> 00:06:33,000
‫And so here you see the tours collection

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00:06:33,000 --> 00:06:34,720
‫that we just created before.

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00:06:34,720 --> 00:06:38,550
‫So remember how I said that back here when we created

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00:06:38,550 --> 00:06:41,830
‫the document we also created the tours collection,

137
00:06:41,830 --> 00:06:44,790
‫because every document always has to be inside of

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00:06:44,790 --> 00:06:45,760
‫a collection.

139
00:06:45,760 --> 00:06:48,630
‫Okay, so these are the very basic commands

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00:06:48,630 --> 00:06:51,320
‫in the Mongo Shell, and over the next couple of lectures

141
00:06:51,320 --> 00:06:54,670
‫we will then create documents, query them, update them,

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00:06:54,670 --> 00:06:55,970
‫and also delete them.

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00:06:55,970 --> 00:06:58,243
‫So basically all the craft's operation.

144
00:06:59,460 --> 00:07:02,520
‫For now let me just show how we can actually quit

145
00:07:02,520 --> 00:07:03,800
‫the Mongo Shell.

146
00:07:03,800 --> 00:07:06,740
‫So, very easy, you just type quit like this

147
00:07:06,740 --> 00:07:08,660
‫and it will then exit it.

148
00:07:08,660 --> 00:07:11,630
‫Just to quickly show you that our database was

149
00:07:11,630 --> 00:07:16,020
‫actually persisted, let's simply run the Shell again,

150
00:07:16,020 --> 00:07:19,890
‫then clear it quickly again, "show dbs",

151
00:07:19,890 --> 00:07:22,430
‫and you see that natours is still here,

152
00:07:22,430 --> 00:07:23,813
‫and we can also use it.

153
00:07:27,820 --> 00:07:30,980
‫Okay, so everything is still there, meaning

154
00:07:30,980 --> 00:07:34,313
‫that we're now ready to move on to the next video.