使用雄辩的ORM计算总和？

Question

我想知道如何使用雄辩的ORM来计算收入。

挑战： 计算每个客户的计划收入。每个客户都有很多项目。

问题： 如何进行＆＃34;预算成本＆＃34;等操作？在SQL之外。我可以把它放到我的模型或其他地方来访问这些＆＃34;特殊＆＃34;在我看来属性？

这段代码很有效，但我觉得不是很优雅。

    $planned_clients = DB::table('clients')
        ->join('projects', 'clients.id', '=', 'projects.client_id')
        ->select('projects.*', 'clients.title as client_title',
            DB::raw('SUM(projects.planned_budget) as planned_budget'),
            DB::raw('SUM(projects.planned_costs) as planned_costs'),
            DB::raw('SUM(projects.planned_budget) - SUM(projects.planned_costs) as total_revenue')
        )
        ->where('projects.commitment', '=', Project::PLANNED)
        ->whereNotIn('projects.status', [Project::CANCELED])
        ->groupBy('projects.client_id')
        ->get();

以下是架构

class CreateClientsTable extends Migration {

    public function up()
    {
        Schema::create('clients', function(Blueprint $table) {
            $table->increments('id');
            $table->string('client_id')->unique();
            $table->string('title')->unique();
            $table->boolean('is_keyclient')->default(0);
            $table->text('comment');
            $table->timestamps();
        });
    }
}


class CreateProjectsTable extends Migration {

public function up()
    {
        Schema::create('projects', function(Blueprint $table) {
            $table->increments('id');
            $table->string('project_id')->unique();
            $table->string('title');
            $table->integer('client_id')->unsigned();
            $table->enum('commitment', array('save', 'planned'));
            $table->enum('status', array('waiting', 'running', 'done', 'canceled', 'cleared'));
            $table->string('comment');
            $table->integer('planned_budget');
            $table->integer('planned_costs');
            $table->integer('actual_budget');
            $table->integer('actual_costs');
            $table->timestamps();
        });


        Schema::table('projects', function(Blueprint $table) {
            $table->foreign('client_id')->references('id')->on('clients');
        });
    }