1 1 00:00:01,210 --> 00:00:03,180 Hi and and welcome back. In this video, we're going 2 2 00:00:03,180 --> 00:00:07,550 to test our app with the new stores. Now we don't have 3 3 00:00:07,550 --> 00:00:10,580 a way to create stores through the web yet, so we're 4 4 00:00:10,580 --> 00:00:13,570 gonna have to add them into our database manually. 5 5 00:00:13,570 --> 00:00:15,450 We're just gonna do one to make sure that everything's 6 6 00:00:15,450 --> 00:00:18,520 working, and what we're gonna do first is we're gonna make 7 7 00:00:18,520 --> 00:00:20,650 sure that we starting off with a clean slate. 8 8 00:00:20,650 --> 00:00:23,700 So we're going to remove all items and all alerts 9 9 00:00:23,700 --> 00:00:26,400 from our database up to this point in time, so that 10 10 00:00:26,400 --> 00:00:29,610 we don't get anything mixed up moving forward. 11 11 00:00:29,610 --> 00:00:33,600 So db.items.remove and make sure to put an empty 12 12 00:00:33,600 --> 00:00:35,270 set of of curly braces inside the remove. 13 13 00:00:35,270 --> 00:00:36,930 It's gonna remove everything. 14 14 00:00:36,930 --> 00:00:40,417 Db.alerts.remove is going to remove everything. 15 15 00:00:40,417 --> 00:00:43,070 Oh do make sure, by the way I haven't done this but 16 16 00:00:43,070 --> 00:00:46,500 use your database first. So use the database that 17 17 00:00:46,500 --> 00:00:50,610 you have in your application and then do this 18 18 00:00:50,610 --> 00:00:53,320 and there we have it, now we're removing stuff. 19 19 00:00:53,320 --> 00:00:57,710 And so once you've done that, I'm going to also remove all 20 20 00:00:57,710 --> 00:01:00,080 my stores in case I do have any, no I don't, that's 21 21 00:01:00,080 --> 00:01:03,310 good. And then we're going to create a new store. 22 22 00:01:03,310 --> 00:01:08,310 We're gonna insert. So that's db.stores.insert. 23 23 00:01:08,350 --> 00:01:11,470 And then inside brackets, we're gonna put in the 24 24 00:01:11,470 --> 00:01:14,880 necessary information for this store which is 25 25 00:01:14,880 --> 00:01:17,800 _id is gonna be anything you want, it doesn't have 26 26 00:01:17,800 --> 00:01:21,530 to be a UU id, it can be anything. And then the name 27 27 00:01:21,530 --> 00:01:23,590 which is gonna be something you like, John Lewis in 28 28 00:01:23,590 --> 00:01:25,789 my case, the URL prefix which is gonna be 29 29 00:01:25,789 --> 00:01:30,789 https://www.johnlewis.com/ 30 30 00:01:31,220 --> 00:01:35,190 the tag name which is going to be P for the paragraph tag 31 31 00:01:35,190 --> 00:01:38,510 that contains the price in John lewis and then the query 32 32 00:01:38,510 --> 00:01:42,120 is going to be another object in JavaScript which has 33 33 00:01:42,120 --> 00:01:45,780 a class of price price--large 34 34 00:01:46,640 --> 00:01:48,820 So as you can see that contains everything we need to 35 35 00:01:48,820 --> 00:01:53,070 find item prices. And this is going to be linked in the 36 36 00:01:53,070 --> 00:01:55,640 resources section so you don't have to type it out yourself 37 37 00:01:55,640 --> 00:01:58,540 you can copy and paste it and it's totally cool. 38 38 00:01:58,540 --> 00:02:02,200 And so we don't make any mistakes. Now that's one 39 39 00:02:02,200 --> 00:02:05,540 row inserted and we don't have any items or any alerts. 40 40 00:02:05,540 --> 00:02:09,740 So what we have to do now is we have to go and find an 41 41 00:02:09,740 --> 00:02:12,360 item that we're interested in John Lewis and we're gonna 42 42 00:02:12,360 --> 00:02:16,240 create an alert through our web. So let's do that. 43 43 00:02:16,240 --> 00:02:18,850 First of all, make sure MongoDB is running, which it should 44 44 00:02:18,850 --> 00:02:22,586 be and then run your app, and again we now only have 45 45 00:02:22,586 --> 00:02:26,803 the ability to create alerts. We don't have anything else. 46 46 00:02:27,700 --> 00:02:31,000 So our alert form looks like this, has an item URL, 47 47 00:02:31,000 --> 00:02:33,806 I'm gonna put in my iPad Pro there, and then the price 48 48 00:02:33,806 --> 00:02:36,320 limit for something you're interested in. 49 49 00:02:36,320 --> 00:02:39,760 This iPad pro is something like nine million pounds 50 50 00:02:39,760 --> 00:02:42,850 and so I'm going to put five thousand in there so that 51 51 00:02:42,850 --> 00:02:46,580 it will tell me "hey this is under your desired price." 52 52 00:02:46,580 --> 00:02:49,620 Not that anybody should spend five grand on an iPad, 53 53 00:02:49,620 --> 00:02:52,880 but you know. So what that's done in the background is 54 54 00:02:52,880 --> 00:02:57,810 it's gone ahead and it has taken the item URL we've passed, 55 55 00:02:57,810 --> 00:03:02,650 we've found a store with that URL which again uses only the 56 56 00:03:02,650 --> 00:03:06,320 first part of it. And presumably it's found the store 57 57 00:03:06,320 --> 00:03:09,630 that we've created, then it's created an item with that URL 58 58 00:03:09,630 --> 00:03:13,210 on the stores tag name and query, saved it to MongoDB 59 59 00:03:13,210 --> 00:03:16,450 and then created an alert and also saved it to MongoDB. 60 60 00:03:16,450 --> 00:03:19,890 Now we can stop our app. Then we go over to our alert 61 61 00:03:19,890 --> 00:03:23,405 updater. And remember, this alert updater file is going to 62 62 00:03:23,405 --> 00:03:28,405 load the item price and that is going to use the item 63 63 00:03:28,630 --> 00:03:32,690 that it loads up here. Remember, we still got the item 64 64 00:03:32,690 --> 00:03:35,360 module, we're still using the item module, it contains 65 65 00:03:35,360 --> 00:03:38,220 a bunch of useful things like loading prices from the 66 66 00:03:38,220 --> 00:03:42,837 website. So that is going to then go and load the price 67 67 00:03:42,837 --> 00:03:46,970 using the store's tag name and query that we've already 68 68 00:03:46,970 --> 00:03:50,970 saved into this item. So what we're gonna do is we're 69 69 00:03:50,970 --> 00:03:53,070 gonna run the alert of data, so I'm right clicking 70 70 00:03:53,070 --> 00:03:54,730 alert of data, pressing run 71 71 00:03:56,247 --> 00:03:59,210 and there we have our first bug. 72 72 00:03:59,210 --> 00:04:03,330 So good, we're always gonna find some bugs in our 73 73 00:04:03,330 --> 00:04:06,890 applications. This first bug that we've got here is 74 74 00:04:06,890 --> 00:04:09,193 because when we created an alert, 75 75 00:04:10,870 --> 00:04:12,700 this is a string and it 76 76 00:04:12,700 --> 00:04:15,730 comes from the web, 77 77 00:04:15,730 --> 00:04:17,390 not a number. 78 78 00:04:17,390 --> 00:04:21,230 So the price that the items found on the website is 79 79 00:04:21,230 --> 00:04:24,130 converted into a float, but the number that I stored in 80 80 00:04:24,130 --> 00:04:27,230 our database is not converted into a float, it is a string. 81 81 00:04:27,230 --> 00:04:32,230 So we do have to turn this into a float before we save it 82 82 00:04:33,000 --> 00:04:35,930 to our database. Okay, that's totally fine. 83 83 00:04:35,930 --> 00:04:38,670 What do we have to do now that we found a bug in our alert 84 84 00:04:38,670 --> 00:04:43,130 creation? Go into the database, delete the alert and then 85 85 00:04:43,130 --> 00:04:45,580 go and recreate it. So let me do that real quick. 86 86 00:04:46,810 --> 00:04:49,990 Good, I've gone recreated my alert, now hopefully it is 87 87 00:04:49,990 --> 00:04:52,523 all correct, we can run our alert updater again. 88 88 00:04:53,680 --> 00:04:57,770 And there we have it. This item has reached a price under 89 89 00:04:57,770 --> 00:05:02,270 five thousand, the latest price is 1469.0. 90 90 00:05:02,270 --> 00:05:05,940 Still expensive. (laughs) So there you have it, 91 91 00:05:05,940 --> 00:05:09,150 very important to be testing things out as you go along 92 92 00:05:09,150 --> 00:05:11,680 so that you can find bugs precisely like that one, 93 93 00:05:11,680 --> 00:05:13,490 maybe you realised that this should have been a float 94 94 00:05:13,490 --> 00:05:16,930 earlier on, I know I did like 10 videos ago and then 95 95 00:05:16,930 --> 00:05:21,010 I forgot to add it in, and so that's cool, you've found a 96 96 00:05:21,010 --> 00:05:24,110 bug, we fix it and we move on forwards. 97 97 00:05:24,110 --> 00:05:26,270 Now that we've parted this out, we know that our 98 98 00:05:26,270 --> 00:05:30,610 stores idea is going to work. So we can allow users 99 99 00:05:30,610 --> 00:05:35,240 line:15% now to create new stores using our website. 100 100 00:05:35,240 --> 00:05:37,200 line:15% We're gonna be doing that over the next few videos, 101 101 00:05:37,200 --> 00:05:38,300 so I'll see you there.