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Data Model Questions /

Moderators: martimiz, Sean, Ed, biapar, Willr, Ingo, swaiba

How to group a query and get n th items per group


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2 Posts   1339 Views

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dacar

Community Member, 173 Posts

22 April 2016 at 7:10am

Hi, i 've got a table Bildergalerie. Each record has a correspondending page (PageID). How can i loop over the table and query 4 records randomly per each PageID (grouping?) and pass the result to the template?

ID ClassName PageID
1 Bildergalerie 8
2 Bildergalerie 12
3 Bildergalerie 13
4 Bildergalerie 13
5 Bildergalerie 13
6 Bildergalerie 13
7 Bildergalerie 13
8 Bildergalerie 13
9 Bildergalerie 13
10 Bildergalerie 13
11 Bildergalerie 8
12 Bildergalerie 8
13 Bildergalerie 12
14 Bildergalerie 12
15 Bildergalerie 12
16 Bildergalerie 12
17 Bildergalerie 12
18 Bildergalerie 12
19 Bildergalerie 12
20 Bildergalerie 12
21 Bildergalerie 12
22 Bildergalerie 12
23 Bildergalerie 12
24 Bildergalerie 12
25 Bildergalerie 12

Hope anybody can help. THX :-)

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dacar

Community Member, 173 Posts

22 April 2016 at 7:51pm

Got it by myself:

    public function GroupedEntries() {
			return GroupedList::create(
				Bildergalerie::get()->sort('RAND()')
			);
    }

 
    <% loop $GroupedEntries.GroupedBy('PageID') %>
    <% loop $Children.Limit(4) %>
    <div class="grids col-xs-12 col-sm-4 col-md-3 mix all $Page.URLSegment">
        <div class="grid">
            <img src="$Bildergalerie.BildergalerieThumb.URL" width="400" height="273" alt="$Alttext" class="img-responsive" />
            <div class="figcaption">
            <h4>$Alttext</h4>
            <a href="$Bildergalerie.BildergalerieBig.URL" data-rel="prettyPhoto[portfolio]">
                <i class="fa fa-search"></i>
            </a> 
            <% if VerlinkungID %><a href="$Verlinkung.Link">
                <i class="fa fa-link"></i>
            </a><% end_if %></div>
        </div>
    </div>
    <% end_loop %>
    <% end_loop %>