Laravel链子

Question

我正在使用laravel并使用过滤器进行查询，我不知道该怎么做但我有一个想法，这就是我想要的。

            $wheresMethodsChain;

            $type = "house";
            $model = "paper";
            // sometimes it could be empty
            $size = "";

            if ($type != "") {
                // add to chain to call later
                add_to_my_chain_of_wheres( $wheresMethodsChain , ->where('type',$type) );
                // wheresMethodsChain = ->where('type',$type)
            }
            if ($model != "") {
                add_to_my_chain_of_wheres( $wheresMethodsChain , ->where('model',$model) );
                // wheresMethodsChain = ->where('type',$type)->where('model',$model)

            }
            if ($size != "") {
                add_to_my_chain_of_wheres( $wheresMethodsChain , ->where('size',$size) );
                // wheresMethodsChain =  ->where('type',$type)->where('model',$model)

            }
            // the final chain should be something like this, only two because the "$size" variable is empty
            // ->where('type',$type)->where('model',$model)

            // Finally add the chain of wheres at the end of my query
            $regs = DB::table('mytable')->paginate(10)->wheresMethodsChain;

感谢您的帮助

Answer 1

这就是你要做的：

$query = DB::table('mytable');

if($type){
    $query = $query->where('type', $type);
}
if($model){
    $query = $query->where('model', $model);
}
if($size){
    $query = $query->where('size', $size);
}

$results = $query->paginate(10);

Answer 2

另一种可能的解决方案。如果你总是要使用=运营商，比如...

$query->where('something', $something)

然后，您可以尝试这样的事情：

$data = array_filter(compact('type', 'model', 'size'));

$results = DB::table('mytable')->where($data)->paginate(10);