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So in the last lecture, we identified one problem, and it's actually three problems, but the first



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one, the one we identified was here.



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When I'm on the reservation calendar, if I go to a reservation, not a booking or a block or whatever,



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but I go to an actual reservation or an actual booking and I try to market has processed, it will take



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me to a page not found.



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And that's because it's taking us to a route that doesn't exist.



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If you look in the reservations handler over here and we find the post reservation when we do our redirect



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at the bottom, we're always going to it's admin's reservations, Dasch, something SIRC and the Sarsae



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is actually grabbed from this part of the URL and there is no path.



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Admin's reservations.



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Dasch count now an easy fix and not a good one, but an easy fix would be to set up a new route that



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matches admin's reservations.



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Dougall and it always takes the user back to here.



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And the only problem with that, of course, is it's great if I'm doing a reservation for the current



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month, but if I go to a different month and click on this and then click Save or Marquez processed



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and this one happens to be processed, but if I clicked on the Marquez processed button, it would actually



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take me back to the current month and year in the calendar, which isn't where I came from.



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And that's nonintuitive.



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And that's going to cause some grief for the actual user of the application.



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So that's not a great idea.



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What might be a better idea is to pass, say, some query parameters.



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So questionmark Y equals twenty twenty or twenty, twenty one and month equals twenty or 02 and that



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would take me to February of twenty twenty one.



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So that would mean that I would have to pass this early, grab the query parameters, put them in hidden



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fields in here and away we go.



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There's only one problem with this, and that is the way that we're getting this I.D., that nine in



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this case.



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So if we go back and look at the way that we're doing it on the admin show, reservation page, which



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is right here, we're actually getting the ID by exploding or splitting our request, you or I.



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And that's this entire U.



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URL up here.



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We're splitting that on the slash and we're getting the item in the fourth position as the ID and then



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converting that to an end.



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OK, so right now we have this is position zero.



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Admin is position one reservation a position to Kala's position three.



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And now all of this is position four.



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And I can't split that or can't convert that string to an end because clearly it's not it it's got letters



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and punctuation in there.



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So I need somehow to deal with this problem.



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How am I going to get both the ID and the year and the month?



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And I want the year in a month so I can redirect them back to the appropriate month on the calendar?



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Well, there's a couple of ways of doing this.



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We could first of all, one option is to change that.



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Nine, the ID from a part of the actual euro Eurail into it, another query parameter that would work



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like that one.



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But that would work or and this is a little complicated, but I could explode it as I am right now,



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then take that exploded for and check to see if it contains a question mark.



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If it does, then split exploded four on the question mark and grab position zero.



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That will be the ID again.



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Very awkward.



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It might be simpler if I just change the URL to something like this show and then year in month, because



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now position four will always be an aunt.



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I ignore position five and I still have access to my query parameters.



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Let's do that.



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So I'll go over to my roots file, which is right here, and I will change the bit where I'm showing



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a reservation just by putting a slide show after it.



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Now, of course, that means any changes in more places.



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I need changes on the reservation calendar page, so let's find that and put its slash.



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There are slash show right here at the very end and that's all I have to do.



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We also need it for this page, new reservations and for this page, all reservations.



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And we might have to do some redirects, but we'll check those out in a minute.



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So let's go to new reservations.



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And all I have to do is say show after the URL bit and all reservations and put a show here as well.



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OK, let's stop our application just in case.



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Start it up again.



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It compiles let's make sure all of that works.



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So let's go to the dashboard just to make sure we're on a new page, go to new reservations.



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OK, that worked.



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Let's go to all reservations.



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That worked.



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Let's go to the reservation calendar.



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And that worked perfect.



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Now, this last one where I came from, the reservation calendar, here's where I want the questionmark



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y equals the year and then so on and so forth, the month.



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So let's go back to our admin reservations calendar page and just add those to the URL.



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So I'll make this a little wider.



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And all I have to do is questionmark y equals Curre year.



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Ampersands.



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M equals per month because I already have current year and current month stored in variables, so I



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don't need to pull them out of the stream out there, right here so I can save this.



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Go back here.



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Let's go back to the reservation calendar.



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I shouldn't have to restart because I'm reloading the templates on every request.



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The euro looks right in the lower left.



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Let's see if it works.



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And it does.



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So now I have the year in the month, so I better put them as hidden fields on this actual page so I



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can do something with them.



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So let's go to the reservation show page or reservation handlers find that first we want to show the



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reservation and all I need to do is to grab the year in the month from the query parameters.



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So I'll do it after I declare the string maps so I can add them right to the string map.



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And I'll say here is a sign the value of our euro dot query doget and I'm looking for Y and then I'll



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duplicate this and I'll put month is equal to M and now add those to our string map string map month.



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Equals month and do the same thing for a year.



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OK, and then on the admin reservation show page, now that I have those, once I restart my application,



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I'll have them.



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Now I can put them in here, sit hidden fields.



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The input type equals hidden name equals year value equals index dot string map here.



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And close that and duplicate this and make that a month.



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And make this month and stop our application and start our application.



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And we'll go right back to the calendar page just to make sure everything's working properly, and this



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time I'll use December 20/20 and I'll try this reservation.



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OK, there's my year in my month and let's check our source code and look for the word hidden.



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And there's year in month.



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Perfect.



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OK, so I have those now.



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So now I can finally at this point determine whether or not I have to do a redirect.



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So let's go back to our handler and just look at this one more time.



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So when I grab my year in one month from my query parameters.



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If there is no query parameter, those should be empty strings, let's make sure that actually works.



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So here's a way I'm going to get to a reservation with no query parameters, no month and year.



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So this should still show it.



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And now when I view the source and look for hidden, they should be empty and they are perfect.



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So this will definitely work.



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So now that I have those things posted or available to my post, they're coming to this handler admin



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post show reservation.



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Let's just go back to the calendar and get to one.



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Those two values, year and month are now part of the post request that matches this handler.



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So when I come all the way down here, all I have to do is to see if I have a month and a year value



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that are not empty strings and I can just grab them right from the request.



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So a month is assigned the value of our not formed get em and then year.



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Is why I just have to make a determination here and I'll do it after I write to the sessions, I don't



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want to bother duplicating that.



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If a year is equal to nothing, an empty string, then just do what we've been doing right along.



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Otherwise, we'll redirect somewhere else.



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And we're we're going to take them is to the calendar page, but the correct month and year.



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So reservations dash calendar.



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Questionmark Y equals, and then a string ampersand M equals and then another string, and now I don't



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care about the source, I care about year and month.



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So in theory, this should work.



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Let's find out and if it works for here, we can use the same logic for processing a reservation and



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deleting a reservation.



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So we're running.



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Let's go back here and go to our reservations calendar and bring up a reservation and save it.



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Page not found.



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What did I do wrong, maybe I didn't reload the page.



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Let's look at this, make sure that we have our month in year, year and month 2020 and 12 admin reservations



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calendar.



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And where are we doing our redirect process reservation?



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We want to admit we want the post reservation.



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So if we're equals that are formed, I get em.



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And why?



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What did I call them in here?



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Oh, you're in month.



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That'll explain it.



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Month and year.



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I was looking for parameters that didn't exist.



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So let's stop it and try it one more time.



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So we'll close this, go back to Reservation's calendar, bring up general quarters reservation, save



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this, and they should take me back to that year and that month, December twenty twenty.



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And it does.



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Let's try one in the future.



153

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So here's one.



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Let's save that one.



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That should take me back to January of twenty twenty one.



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And it does.



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Now what about going the old way directly from, not from the calendar.



158

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Let's bring up this pennyworth reservation that should take me back to reservations new because that's



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what they have in my URL is new save and it takes me to reservations.



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New perfect.



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Well that seems to work.



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So now we can do the same thing or use the same logic for making a reservation as processed.



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So let's go back to our code and our terminal window and find the reservation show page.



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So this is the part when I bring up a reservation this way, if I want to mark this is processed, what



165

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is it actually doing?



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Well, if you recall on this page showing a reservation at the very bottom, we have this process reservation



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and that is calling the your admin process reservation, whatever the sources of the ID.



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And now I need to actually pass some query parameters.



169

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So how am I going to do that?



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Well, let's go to look at this actual handler.



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Let's find the roots.



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Let's find the process reservation, which is right here, and bring that up.



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So that's getting the URL the same way or getting the ID from the world the same way that we did in



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the last one.



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And it's using the key rooters, Eurail, Perram.



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I suspect that that works pretty much the same way that we've been doing it by hand.



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So what I'm going to do is actually change the route for deleting or deleting a reservation and for



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processing a reservation.



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So, again, I'll just put this something at the end of it.



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And what I'll put here is processed reservation process, Dasch reservation, whatever the source is,



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whatever the ID is, and then I'll just put a word here do and that'll do it for our purposes.



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So let's go back to the admin reservation show page and change this URL to do.



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And.



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That would come after this, move this down here.



185

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Plus, do you do?



186

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Questionmark and then Y equals I'll pass my year, my month in the same way I have been in the other



187

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one, that would be index dot, string map.



188

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Year ampersand.



189

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M equals index dot string map.



190

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And that should work.



191

00:13:33,770 --> 00:13:37,420

So let's just see if that is rendering the way that I expect it to render.



192

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So I start and stop, stop and start my application and I'll go back and I'll just reload this page.



193

00:13:42,540 --> 00:13:43,510

OK, that's shut up.



194

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All right.



195

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And let's go to the very bottom.



196

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So we're going to have admin process, Dasch reservation slash cow slash, then the idiot slash du questionmark.



197

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That looks perfect.



198

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All right.



199

00:13:57,350 --> 00:14:00,620

So since we're here anyway, let's use the same logic.



200

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Copy this.



201

00:14:04,140 --> 00:14:08,030

Let's just update our you, Earl, for this one as well.



202

00:14:10,630 --> 00:14:15,640

And save that and reload this and I should see the same thing showing up right here.



203

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If I can get down to the bottom of the page.



204

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Yes.



205

00:14:24,190 --> 00:14:29,050

All right, so that means we need to update our route for deleting just by putting a slash do after



206

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it, I just chose to do because I'm doing something.



207

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It's an action.



208

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And then we need to do the same logic in admin process reservation.



209

00:14:38,470 --> 00:14:40,710

So I now have my ID.



210

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I don't need to worry about that at all.



211

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I now have my source.



212

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I don't need to worry about that at all.



213

00:14:44,890 --> 00:14:49,660

And I can also now just check for the year and the month and this time they're showing us query parameters.



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So yea is a sign the value of our euro query dot get and I'm looking for why duplicate that and month.



215

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I'm looking for M.



216

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And I'll leave my session alone, but here, I'll do a check if here is equal to nothing, in other



217

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words, if there is no query parameter for that.



218

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And take them back there where we were at along, otherwise take them to the correct month and year



219

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in the calendar.



220

00:15:30,700 --> 00:15:32,440

So a copy this, I'll paste it.



221

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I'll change that to reservations calendar questionmark month equal or Y equals some string.



222

00:15:42,530 --> 00:15:44,470

Make that an equal sign or this isn't going to work.



223

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Ampersand month equals another string and I substitute year and month and I should work.



224

00:15:55,170 --> 00:15:58,720

So let's try this, let's stop it and start it.



225

00:15:59,650 --> 00:16:00,600

It compiles.



226

00:16:01,390 --> 00:16:07,150

Let's go back to our reservations calendar and this should take me back to December of twenty twenty



227

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once I market as processed.



228

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And it does perfect, so now we just need to do the same thing for delete.



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And one note here, just before I recorded this lecture, when I was running through things to make



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sure they all worked, I noticed that my when I marked a reservation as processed, the button still



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showed up.



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So it's possible that I made that change between lectures.



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It's equally possible that I made the change during a lecture.



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But all you have to verify is on the admin dash reservations that show page template.



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Just make sure that this part is here, that the if statement is still around, that Mark has process



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button.



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If it's not added back in, it's possible I deleted it inadvertently in a previous lecture.



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It's also possible I deleted it between lectures.



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But if you're still seeing that button after you mark something is processed, just make sure that this



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if statement exists in your template.



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All right.



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So the last thing we have to do then is to make this delete button work the same way.



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So I've already updated the route to put to do after it on the admin show reservations page.



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I need to make sure that I have to do after this and I do OK.



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So I now need to open up the admin, delete reservation and use the same logic we did above so I can



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just copy this bit.



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Getting my year in month from the query parameters, put them here and again just do the if a year is



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equal to nothing or an empty string, take them where we have been right along.



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Otherwise take them back to this path which I'll just copy and paste because I already have it and I



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know that it works.



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So if the error is empty, in other words, if there's no query parameter, why then take them back



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to the place we have been right along.



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Otherwise take them back to the correct year and once in the calendar.



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So let's stop this.



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Start this.



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And now we need to make sure this works over the reservation calendar.



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I'll go ahead a month just to make sure I'm looking at a different one.



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And this time I'll delete whatever this reservation is on the 20th of January in the major suite.



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So hopefully this'll work.



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Yes, I'm sure.



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And it works.



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So there now we have the core functionality all working exactly as it should for our back end.



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So the last thing we have to do is the next thing we have to do, not quite the last thing.



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The next thing we have to do is to update some tests.



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And I'm going to do one test for you and let you do the rest of them on your own.



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I'll do a table driven test for some one of the handlers and I will complete the rest of them.



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But I'm only going to do one is a lecture and the rest of them will just go up as the source code and



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you can review them as you wish, because at this point you should be able to write these tests on your



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own.



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But in case you can't, I will provide the full source code for your review.