Convert Raw SQL Query to Laravel Eloquent left outer join - mysql

Question

can anyone help me turn the query in to Eloquent?
Model Orders::
Model TaskCard::
select
ifnull(data, o.created_at) as dataZlecenia,o.id, o.nazwa
from
orders o
left outer join
(select max(created_at) as data,order_id from task_cards
group by order_id) as a
on a.order_id=o.id
order by dataZlecenia desc

Answer 1

Seems like you have wrong namespace as well, try using App\ModelName instead of App\Models\ModelName. And use english for naming functions/classes :)
Check if your foreign keys are used correctly. If you want it to work just out of the box, orders table should have client_id as foreign key and id as primary key, while clients table has to have primary key id. Then this solution will work:
public function order(){
return $this->hasOne('App\Order');
}
via https://laravel.com/docs/5.8/eloquent-relationships
EDIT:
for better understanding :) in create_orders_table migration:
$table->bigIncrements('id');
$table->unsignedBigInteger('client_id');
$table->foreign('client_id')->references('id')->on('clients')->onDelete('cascade');
Moreover I can't see a reason why your client can have just one order. I'd use in Client model:
public function orders(){
return $this->hasMany('App\Order');
}
And in Order model:
public function client(){
return $this->belongsTo('App\Client');
}
This way your client will be able to have multiple orders and an order will have just one assigned client.