orderbydescending in version 8 with custom date field

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Andrew Hopkins 21 posts 133 karma points

Sep 30, 2019 @ 13:35
0

OrderByDescending in version 8 with custom date field

Using Umbraco And Getting Started

Umbraco 8
I have this code in Version 7 to display news items by a custom date field but when I do this in Version 8 it breaks, any ideas what I'm doing wrong? Apologies my Linq & Lambda knowledge is very poor :(
```
var items = Model.Content.Site().FirstChild("news").Children("newsItems").Where(x => x.IsVisible()).OrderBy("newsDateTime descending");
```
Version 8 - Custom date field alias: newsDate (I'm also picking the starting parent from the tree in the variable 'guid'), this works with x.CreatedDate but I really need to do this from a user-defined field.
```
var guid = @Model.Value("repeaterGUID");
var selection = Umbraco.Content(Guid.Parse(@guid.ToString()))
.Children()
.Where(x => x.IsVisible())
.OrderByDescending(x => x.Model.Value("newsDate"));
```
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Steve Megson 151 posts 1022 karma points MVP c-trib

Sep 30, 2019 @ 14:50

1

I think you just need to use x.Model.Value<DateTime>("newsDate") so that OrderByDescending knows that it's sorting dates.

Although Model.Value("newsDate") will be returning DateTimes, as far as OrderByDescending knows it could return any object. It doesn't know that they all happen to be DateTimes, and since it doesn't know how to compare object, it breaks.

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Andrew Hopkins 21 posts 133 karma points

Sep 30, 2019 @ 15:04

0

Thanks, Steve really appreciate you taking the time to reply. I had tried this previously and just again now, but I still get an error, so I think it could be the version of 8 I am using (Umbraco version 8.0.2) which is the issue as the error seems unrelated to the task at hand.

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Steve Megson 151 posts 1022 karma points MVP c-trib

Sep 30, 2019 @ 15:37
100
Oops, I skipped straight to the sorting and forgot that Children is a property now. Try this:
```
var selection = Umbraco.Content(Guid.Parse(@guid.ToString()))
.Children
.Where(x => x.IsVisible())
.OrderByDescending(x => x.Value<DateTime>("newsDate"));
```
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Andrew Hopkins 21 posts 133 karma points

Sep 30, 2019 @ 15:49

Perfect!! A million thanks!!

var guid = @Model.Value("repeaterGUID");
var selection = Umbraco.Content(Guid.Parse(@guid.ToString()))
.Children()
.Where(x => x.IsVisible())
.OrderByDescending(x => x.Value("newsDate"));

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