Is there a clean way to enable certain models to be ordered by a property by default? It could work by extending the laravel\'s QueryBuilder, but to do so,
Nowadays we can solve this problem also with global scopes, introduced in Laravel 4.2 (correct me if I'm wrong). We can define a scope class like this:
column = $column;
$this->direction = $direction;
}
public function apply(Builder $builder, Model $model)
{
$builder->orderBy($this->column, $this->direction);
// optional macro to undo the global scope
$builder->macro('unordered', function (Builder $builder) {
$this->remove($builder, $builder->getModel());
return $builder;
});
}
public function remove(Builder $builder, Model $model)
{
$query = $builder->getQuery();
$query->orders = collect($query->orders)->reject(function ($order) {
return $order['column'] == $this->column && $order['direction'] == $this->direction;
})->values()->all();
if (count($query->orders) == 0) {
$query->orders = null;
}
}
}
Then, in your model, you can add the scope in the boot() method:
protected static function boot() {
parent::boot();
static::addGlobalScope(new OrderScope('date', 'desc'));
}
Now the model is ordered by default. Note that if you define the order also manually in the query: MyModel::orderBy('some_column'), then it will only add it as a secondary ordering (used when values of the first ordering are the same), and it will not override. To make it possible to use another ordering manually, I added an (optional) macro (see above), and then you can do: MyModel::unordered()->orderBy('some_column')->get().
Laravel 5.2 introduced a much cleaner way to work with global scopes. Now, the only thing we have to write is the following:
column = $column;
$this->direction = $direction;
}
public function apply(Builder $builder, Model $model)
{
$builder->orderBy($this->column, $this->direction);
}
}
Then, in your model, you can add the scope in the boot() method:
protected static function boot() {
parent::boot();
static::addGlobalScope(new OrderScope('date', 'desc'));
}
To remove the global scope, simply use:
MyModel::withoutGlobalScope(OrderScope::class)->get();
Solution without extra scope class
If you don't like to have a whole class for the scope, you can (since Laravel 5.2) also define the global scope inline, in your model's boot() method:
protected static function boot() {
parent::boot();
static::addGlobalScope('order', function (Builder $builder) {
$builder->orderBy('date', 'desc');
});
}
You can remove this global scope using this:
MyModel::withoutGlobalScope('order')->get();