Sorting UNION queries with Laravel 4.1
Solution 1
It seems to be fixed in this pull request: https://github.com/laravel/framework/pull/3901
Solution 2
This i believe is a bug and is not fixed yet. I have the same issue when trying to sort union queries.
$query1->union($query2)->orderBy('foo','desc')
causes the order by clause to be added to $query 1 alone.
Adding orderBy individually to $query1 and $query2 and then doing a union like below
$query1->orderBy('foo desc');
$query2->orderBy('foo desc');
$query1->union($query2);
This obviously works but it does not produce the same result as doing a orderBy on the union's result.
For now, the workaround seem to be doing something like
$query = $query1->union($query2);
$querySql = $query->toSql();
$query = DB::table(DB::raw("($querySql order by foo desc) as a"))->mergeBindings($query);
This would produce a query like:
select * from (
(select a as foo from foo)
union
(select b as foo from bar)
) as a order by foo desc;
And that does the trick.
Solution 3
I don't really know Laravel, but I'll bet this will do it:
$photos = DB::table('photos')->select('id', 'name', 'created_at');
$videos = DB::table('videos')->select('id', 'name', 'created_at');
$combined = $photos->union($videos)->orderBy('created_at', 'desc');
JackPoint
Updated on June 05, 2022Comments
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JackPoint almost 2 years
I think there is something changed in the
union
between Laravel 4 and Laravel 4.1. I have 2 models.$photos = DB::table('photos')->select('id', 'name', 'created_at'); $videos = DB::table('videos')->select('id', 'name', 'created_at');
I want to union the 2 querys and order the 2 querys with the
created_at
field.$photos = $photos->orderBy('created_at', 'desc'); $combined = $photos->union($videos);
With Laravel 4 it gives me this query:
select `id`, `name`, `created_at` from `videos` union select `id`, `name`, `created_at` from `photos` order by `created_at` desc
This works ok, it sorts the results for both querys together. In Laravel 4.1 it gives me this query:
(select `id`, `name`, `created_at` from `videos`) union (select `id`, `name`, `created_at` from `photos` order by `created_at` desc)
This results in a list of videos and after that an ordered list of photos. I need to have a list where the to combined querys are sorted. I want Laravel to give me this query:
(select `id`, `name`, `created_at` from `videos`) union (select `id`, `name`, `created_at` from `photos`) order by `created_at` desc
How do get this working in Laravel?
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JackPoint about 10 yearsThis will order the individual querys, not the querys together: (select
id
,name
,created_at
fromvideos
order bycreated_at
desc) union (selectid
,name
,created_at
fromphotos
order bycreated_at
desc) -
Barmar about 10 yearsWell, I said I don't know Laravel.
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JackPoint about 10 yearsThis will order the individual querys and put the results in one list, it doesn't order that list.
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Joel Hinz about 10 yearsMy apologies, I misunderstood the question. If it doesn't work with $combined->orderBy('described', 'desc') after that, which I don't think it will, then I'm as lost as you.
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Waiyl Karim over 9 yearsWorked like a charm. However, it would be helping for newbies to mention that they need to update by
composer update
and then refer to the link you provided!