我需要定义一个全局过滤器,以便只获取表中的desires文件。问题是需要根据其他关系进行过滤,因为我需要在查询中进行连接。 我的问题是,在定义全局范围之后,关系具有连接中涉及的所有表的所有行,这会使代码崩溃,因为存在不明确的列。
我怎样才能在过滤后返回产品表?
我基于这篇文章中的代码
http://softonsofa.com/laravel-how-to-define-and-use-eloquent-global-scopes/
laravel帮助 http://laravel.com/docs/4.2/eloquent#global-scopes这个 Global filtering - how to use global scope in Laravel Eloquent
我的代码
class PublishedScope implements ScopeInterface {
public function apply(Builder $builder)
{
$table = $builder->getModel()->getTable();
$temp = $builder
->select("products.*")
->join('products_categories as p_c', 'p_c.product_id', '=', 'products.id')
->join('categories as cat', 'p_c.category_id', '=', 'cat.id')
->Where(function($query){
$query->where('cat.id', '!=', '888130');
}
);
$this->addWithDrafts($builder);
}
public function remove(Builder $builder)
{
$query = $builder->getQuery();
$column = 'cat.slug';
$bindingKey = 0;
foreach ((array) $query->wheres as $key => $where)
{
if ($this->isPublishedConstraint($where, $column))
{
unset($query->wheres[$key]);
$query->wheres = array_values($query->wheres);
$this->removeBinding($query, $bindingKey);
}
// Check if where is either NULL or NOT NULL type,
// if that's the case, don't increment the key
// since there is no binding for these types
if ( ! in_array($where['type'], ['Null', 'NotNull'])) $bindingKey++;
}
}
protected function removeBinding(Builder $query, $key){
$bindings = $query->getRawBindings()['where'];
unset($bindings[$key]);
$query->setBindings($bindings);
}
protected function addWithDrafts(Builder $builder){
$builder->macro('withDrafts', function(Builder $builder)
{
$this->remove($builder);
return $builder;
});
}
}
并在模型类中
protected static function boot() {
parent::boot();
static::addGlobalScope(new PublishedScope);
}
答案 0 :(得分:0)
也许不是最好的解决方案,但是在sql中进行子查询可以正常工作。
public function apply(Builder $builder){
$table = $builder->getModel()->getTable();
$sql = '
SELECT "products".*
FROM (
SELECT "products".*
FROM "products" INNER JOIN "products_categories" AS
"p_c" ON "p_c"."product_id" = "products"."id" INNER JOIN
"categories" AS "cat" ON "p_c"."category_id" = "cat"."id"
WHERE (
cat.id != 888130
)
)AS products';
$builder
->select("products.*")
->from(DB::raw("($sql) AS products"));
}
$this->addWithDrafts($builder);
}