1 00:00:01,410 --> 00:00:02,970 So let's look at where we are right now. 2 00:00:03,060 --> 00:00:06,840 I'm going to make sure my application is running and just see what we have to do next. 3 00:00:07,620 --> 00:00:08,880 So I start the application. 4 00:00:08,890 --> 00:00:15,030 I go over to my favorite browser and choose the homepage, which is where I am, and make a reservation, 5 00:00:15,540 --> 00:00:21,450 choose any two dates, because I know that will show me something that's valuable and search. 6 00:00:21,690 --> 00:00:25,710 So we're here and I want this to be clickable. 7 00:00:25,740 --> 00:00:26,940 I want that to be a click. 8 00:00:26,940 --> 00:00:31,950 When I click on Generals' quarters, it takes me off the reservation page and before it shows me the 9 00:00:31,950 --> 00:00:39,360 page, it actually stores the fact that I want to stay in the generals quarters in my social variable 10 00:00:39,360 --> 00:00:41,000 called reservation that we did last time. 11 00:00:41,730 --> 00:00:45,570 So let's go back to the template and create a link. 12 00:00:46,470 --> 00:00:52,710 So I'm going to open up my template, choose room and I maybe will make this an unordered list for right 13 00:00:52,710 --> 00:00:53,070 now. 14 00:00:53,070 --> 00:00:58,530 So I'll wrap this whole thing in a U-Haul tag, which eventually I'll get to be able to typewrite. 15 00:01:01,300 --> 00:01:09,250 Get rid of that and put my closing, you will tag here and inside of here, the room name should be 16 00:01:09,250 --> 00:01:10,480 wrapped in an L.A. tag. 17 00:01:16,110 --> 00:01:19,520 And I want this to be a link, so what do I want this link to be? 18 00:01:19,530 --> 00:01:25,290 It can be anything I want, but I want to make sure that the link includes the ID of the room that is 19 00:01:25,290 --> 00:01:26,160 currently displaying. 20 00:01:26,160 --> 00:01:32,730 And I know I have that in the ID of the individual entries that I see as arranged through Rum's. 21 00:01:33,120 --> 00:01:42,000 So I can just say a F equals and I'll call this Chew's room, followed by the ID, which is Daudt ID 22 00:01:42,540 --> 00:01:48,570 and I just wrap it in my double curly braces so it pulls it out of the current iteration of the room's 23 00:01:48,570 --> 00:01:51,180 variable and ranging through and shows it there. 24 00:01:51,870 --> 00:02:01,320 And then I can just close this, opening a tag and of course close the whole attack right there so that 25 00:02:01,320 --> 00:02:06,570 when I, when I reload this page, if I save this and go back, I might be able to just reload here 26 00:02:06,990 --> 00:02:08,610 and say resend and there it is. 27 00:02:08,610 --> 00:02:09,330 Not quite right. 28 00:02:09,340 --> 00:02:10,820 So I've got a typo in there somewhere. 29 00:02:10,830 --> 00:02:11,810 Yes, there it is. 30 00:02:12,540 --> 00:02:13,850 Let's put that there. 31 00:02:14,550 --> 00:02:16,260 Save this looks right now. 32 00:02:16,260 --> 00:02:20,780 Reload this and I still have an extra tag somewhere. 33 00:02:20,790 --> 00:02:21,450 There it is. 34 00:02:24,590 --> 00:02:31,790 All right, that looks better now that I've created this Eurail choose dash room, followed by a number 35 00:02:32,070 --> 00:02:33,730 I need to create a route for it. 36 00:02:33,740 --> 00:02:37,730 So let's go back to our roots file and see how we're going to do that, because we haven't done this 37 00:02:37,730 --> 00:02:38,020 yet. 38 00:02:38,450 --> 00:02:40,100 So roots, they're there. 39 00:02:41,060 --> 00:02:44,360 I want to create a new route mux. 40 00:02:45,170 --> 00:02:51,170 It's a get route because I'm just clicking on a link to Choose Dasch room, and then I want the idea 41 00:02:51,180 --> 00:02:51,830 to go in there. 42 00:02:51,950 --> 00:02:53,390 And how am I going to do that? 43 00:02:53,420 --> 00:03:00,350 Well, the nice thing about this router, Krutch, the China key router is I can just do this, put 44 00:03:00,350 --> 00:03:04,820 parentheses around the a variable name of my own choosing. 45 00:03:04,820 --> 00:03:07,750 It could be whatever I wanted, but I chose it because it's a remedy. 46 00:03:08,840 --> 00:03:13,850 And what this route will match is choose Dasch room slash anything. 47 00:03:14,240 --> 00:03:17,510 And I want that to go to Handler's repo. 48 00:03:18,020 --> 00:03:24,520 And I'm need to create a new method or new function called Choose Room, which I will do right now. 49 00:03:24,530 --> 00:03:31,340 So let's go over to our handlers and create a new function, which I will call func. 50 00:03:31,340 --> 00:03:36,680 And it's going to have the repository receiver because I'm going to be using that and I'm calling it 51 00:03:36,680 --> 00:03:37,790 to choose room. 52 00:03:38,150 --> 00:03:46,300 And it takes a W, which is an active response writer and a pointer to a request and cdpr dot request. 53 00:03:46,790 --> 00:03:47,870 Now request. 54 00:03:50,020 --> 00:03:54,780 OK, so now I have this function, so my roots shouldn't show an error now, and it does not, what 55 00:03:54,780 --> 00:03:56,790 do I want to do in this function? 56 00:03:57,390 --> 00:04:04,050 Well, the very first thing I want to do is to get this part of the URL, the ID right here. 57 00:04:04,080 --> 00:04:09,700 I want to read that from the actual Eurail and receiving and store it as my remedy. 58 00:04:09,900 --> 00:04:11,820 That's the room that I'm currently choosing. 59 00:04:12,450 --> 00:04:18,990 So if this shows the general's quarters with an ID of one and somebody clicks on the link, I want to 60 00:04:18,990 --> 00:04:19,640 get the one. 61 00:04:19,830 --> 00:04:24,450 If they click on the major suite, which is an idea of two, this will be a two. 62 00:04:24,450 --> 00:04:26,270 When I click on it, I want to get the two. 63 00:04:26,940 --> 00:04:28,920 So let's go back to our handlers and see how we do that. 64 00:04:29,490 --> 00:04:33,330 Now, the nice thing about Chey is it has some helper methods that allows us to do this. 65 00:04:33,600 --> 00:04:36,390 So I'll say room ID, which is what I'm going to call the variable. 66 00:04:36,810 --> 00:04:41,870 And potentially an error is equal to sturgeons. 67 00:04:42,480 --> 00:04:46,500 We're going to convert a string from a into an integer, a two high. 68 00:04:47,520 --> 00:04:51,420 And inside of that, I'm going to call the helper function built into the router. 69 00:04:51,660 --> 00:04:54,510 So Chey dot Eurail Perram. 70 00:04:54,720 --> 00:04:56,400 You are L Perram. 71 00:04:56,880 --> 00:04:57,390 There it is. 72 00:04:57,390 --> 00:04:59,420 And that requires two arguments. 73 00:04:59,430 --> 00:05:05,790 It requires our request, which I have, and it requires the key, which is exactly what I called it 74 00:05:05,790 --> 00:05:07,190 in the Roots file. 75 00:05:07,530 --> 00:05:15,230 So I chose ID here because over in Roots it's ID inside those curly braces. 76 00:05:16,440 --> 00:05:19,440 So now I have the remedy that I need to check for an error. 77 00:05:19,500 --> 00:05:29,220 If error is not equal to nil, I'll just display a server error helper's server error W and then error 78 00:05:29,730 --> 00:05:30,280 and return. 79 00:05:31,230 --> 00:05:34,600 OK, so now I have my remedy and what am I going to do with that. 80 00:05:34,620 --> 00:05:42,060 Well I need to get that reservation variable I stored in the session somewhere in this function. 81 00:05:42,060 --> 00:05:43,500 I need to pull it out of the session. 82 00:05:43,500 --> 00:05:46,860 I need to update room ID which has a default value of zero. 83 00:05:47,040 --> 00:05:54,020 Stick the room ID in that correct place in that variable and then put the reservation back in session. 84 00:05:54,360 --> 00:06:01,440 So let's get the reservation rez and let's just see what we have, what are what we're going to return 85 00:06:01,440 --> 00:06:02,220 values our first. 86 00:06:02,220 --> 00:06:04,290 So I'll say Emden app. 87 00:06:06,400 --> 00:06:15,730 Dort session doget, and it requires the context, ARGT context, as usual, and it requires the key 88 00:06:15,970 --> 00:06:21,140 and the key I'm looking for is reservation and I'm pulling that out of there. 89 00:06:21,190 --> 00:06:22,300 Is that enough? 90 00:06:22,330 --> 00:06:24,310 Well, let's look at this jet function again. 91 00:06:24,320 --> 00:06:28,480 We haven't done this in a while, so it might be worthwhile looking at, again, get returns, the value 92 00:06:28,480 --> 00:06:30,340 for a given key from the session data. 93 00:06:30,610 --> 00:06:32,610 The return value has the type interface. 94 00:06:32,620 --> 00:06:33,390 Well, that's not good. 95 00:06:33,400 --> 00:06:35,590 I needed to be of type models, stock reservation. 96 00:06:35,950 --> 00:06:38,500 So we usually need to be type asserted before you can use it. 97 00:06:38,500 --> 00:06:44,980 For example, let's copy this example, OK, and go back to our handler and just paste it right below 98 00:06:44,980 --> 00:06:46,770 this and then modify it as necessary. 99 00:06:46,780 --> 00:06:51,520 First of all, let's get rid of the comments and format everything. 100 00:06:52,060 --> 00:06:55,180 And I will call this rez for reservation. 101 00:06:55,690 --> 00:06:57,400 And it's not coming out of session. 102 00:06:57,400 --> 00:07:00,490 It's coming out of Emden app dot session. 103 00:07:01,960 --> 00:07:03,820 And I'm not casting it to a string. 104 00:07:04,060 --> 00:07:08,770 I'm casting it to a model's reservation that are spell models. 105 00:07:08,770 --> 00:07:09,040 Right. 106 00:07:10,180 --> 00:07:10,960 Reservation. 107 00:07:11,590 --> 00:07:15,760 And it's not just ah, I need to get the context from our context. 108 00:07:16,710 --> 00:07:21,250 So now I've actually built this up and I have my reservation variable stored. 109 00:07:21,250 --> 00:07:25,210 I'm not using it yet and I have a not OK and not OK here. 110 00:07:25,240 --> 00:07:26,890 I can just do a server error. 111 00:07:27,100 --> 00:07:29,440 Something went wrong that's sufficient for right now. 112 00:07:30,430 --> 00:07:32,770 Now that I have this reservation, what do I want to do with it? 113 00:07:32,770 --> 00:07:37,000 I want to update the room ID to this variable remedy. 114 00:07:37,060 --> 00:07:45,400 I just do that by saying resort remedy equals ridi and then I put it back in the session and I can do 115 00:07:45,400 --> 00:07:47,050 that the same way I did up here. 116 00:07:47,200 --> 00:07:50,470 I can just up in one of the functions above. 117 00:07:50,470 --> 00:07:51,190 I'll just type it out. 118 00:07:51,400 --> 00:08:00,610 MoCap app session put and it requires the context, art context and it requires the key which I have 119 00:08:00,610 --> 00:08:03,040 to make exactly the same as I used before. 120 00:08:03,340 --> 00:08:04,570 And the value is Rets. 121 00:08:05,620 --> 00:08:07,120 Now I've put that back in session. 122 00:08:07,120 --> 00:08:11,080 So once they've clicked on this, what do I want to do next? 123 00:08:11,080 --> 00:08:16,690 At this point, I want to display the Make Reservation page so I can do that really easily. 124 00:08:16,690 --> 00:08:21,910 Let's find out how we display that reservation page, which is right up. 125 00:08:21,910 --> 00:08:24,160 Well, we'll do from the Roots files faster to get it that way. 126 00:08:24,400 --> 00:08:25,360 Make reservation. 127 00:08:25,360 --> 00:08:30,070 It's this page I want it to want to show so I can just redirect them to that page at this point. 128 00:08:30,100 --> 00:08:32,680 OK, so I'm going to copy that. 129 00:08:32,680 --> 00:08:40,720 You orl go back to choose room in my handlers, which is right here, the very bottom and paste. 130 00:08:40,720 --> 00:08:41,200 Oh sorry. 131 00:08:41,530 --> 00:08:46,210 Put in htp dot redirect which is right here. 132 00:08:48,140 --> 00:08:55,130 And it requires the W, the R, the Eurail, which I'll paste in and the code HDB dot status C other 133 00:08:55,130 --> 00:08:58,220 because it's in 300 range and that's a nice useful one. 134 00:08:58,460 --> 00:09:02,150 All the other 300 ranges probably are inappropriate, and that's all I have to do. 135 00:09:02,610 --> 00:09:03,200 I think. 136 00:09:03,500 --> 00:09:04,820 Let's start our application. 137 00:09:05,210 --> 00:09:06,020 So stop it. 138 00:09:06,170 --> 00:09:06,710 Start it. 139 00:09:09,600 --> 00:09:10,320 Did it compile? 140 00:09:11,260 --> 00:09:16,930 Yeah, it compiled let's go back to our Web browser and let's go back to the home page and start this 141 00:09:16,930 --> 00:09:18,190 process right from the beginning. 142 00:09:18,340 --> 00:09:19,420 Make a reservation now. 143 00:09:20,440 --> 00:09:22,650 So I'm searching for any two dates. 144 00:09:23,110 --> 00:09:27,340 Doesn't matter what they are in this case, because everything's available except for that little range 145 00:09:27,340 --> 00:09:28,040 in February. 146 00:09:28,090 --> 00:09:31,020 So I searched for it and then I click on Generals' quarters. 147 00:09:31,660 --> 00:09:32,080 All right. 148 00:09:32,200 --> 00:09:33,590 Didn't quite work. 149 00:09:33,730 --> 00:09:35,170 What went wrong? 150 00:09:35,200 --> 00:09:35,990 Well, let's find out. 151 00:09:37,810 --> 00:09:40,000 So I get this. 152 00:09:40,330 --> 00:09:41,920 Are there anything is there anything in the log file? 153 00:09:41,920 --> 00:09:42,430 There is. 154 00:09:42,430 --> 00:09:43,690 There is an error there. 155 00:09:43,810 --> 00:09:44,290 All right. 156 00:09:44,290 --> 00:09:52,990 The error is invalid memory address or nil pointer dereference in here from internal helpers, from 157 00:09:52,990 --> 00:09:53,530 handlers. 158 00:09:53,530 --> 00:09:53,960 Dok go. 159 00:09:53,980 --> 00:09:54,970 Let's see what that line is. 160 00:09:55,740 --> 00:09:56,860 Ah OK. 161 00:09:57,520 --> 00:09:58,930 Here I made a mistake. 162 00:09:58,930 --> 00:10:00,070 I left Fux in there. 163 00:10:00,070 --> 00:10:02,500 I'm not getting a reservation out of the session. 164 00:10:02,890 --> 00:10:05,320 I'm saying results. 165 00:10:05,320 --> 00:10:12,460 OK is reser invasion and then this line gets deleted altogether. 166 00:10:12,670 --> 00:10:13,930 So that was my mistake. 167 00:10:14,290 --> 00:10:15,340 Happens sometimes. 168 00:10:15,820 --> 00:10:18,460 Let's clear the screen and run it again. 169 00:10:20,730 --> 00:10:27,630 And try again, so we'll go back one screen, back one screen, reload this page, put in two dates 170 00:10:27,630 --> 00:10:31,440 just to make sure that it's getting the values and search. 171 00:10:31,440 --> 00:10:33,480 And this time I click on Major Sweep. 172 00:10:33,540 --> 00:10:34,930 That looks better. 173 00:10:35,070 --> 00:10:37,470 So now I need to fix this screen up. 174 00:10:37,830 --> 00:10:42,990 What I want to display next is I want to get rid of start date, end date and the hidden field that 175 00:10:42,990 --> 00:10:43,910 I have down here. 176 00:10:44,460 --> 00:10:48,690 Well, I might I shall leave that hidden field, but I'll probably have to work on it a little bit up 177 00:10:48,690 --> 00:10:51,690 at the top underneath where it says reservation details. 178 00:10:51,690 --> 00:10:56,760 I want to put start date and date and the room names and then ask for their first name, last name, 179 00:10:56,760 --> 00:10:57,720 email and phone. 180 00:10:57,930 --> 00:10:58,350 All right. 181 00:10:58,440 --> 00:11:01,080 We'll take care of that in the next lecture.