竞标只能发起一次

app/AdminSupplier/Controllers/DemandBiddingController.php

@@ -107,6 +107,12 @@ class DemandBiddingController extends AdminController
 			$form->disableDeleteButton();
 			$form->disableViewButton();
 			$form->disableViewCheck();
+
+			$demand_id = request('demand_id');
+			if ($demand_id && \App\Models\DemandBidding::find($demand_id)) {
+				Admin::exit('你已经竞标过了，无需重复参加');
+			}
+
 			$form->display('id')->disable();
 			if(request('is_bidding',0)) {
 				$form->textarea('comment')->disable();

app/AdminSupplier/Controllers/DemandController.php

@@ -33,7 +33,7 @@ class DemandController extends AdminController
      */
     protected function grid()
     {
-        return Grid::make(new Demand(['publisher','biddingUser']), function (Grid $grid) {
+        return Grid::make(new Demand(['publisher','biddingUser', 'bidding']), function (Grid $grid) {
         	if (\request('self',0)) {
 				$grid->model()->where(['publisher_id' => Admin::user()->id,'publisher_type' => DemandTraits::$col[1]]);
 			}
@@ -72,7 +72,8 @@ class DemandController extends AdminController
 			}else{
 				$grid->column('bidding','竞标')
 					->if(function (){
-						return $this->state == 1 && $this->bidding_user_type == DemandTraits::$col[1];
+						// $this->bidding 表示参加过竞标后不再显示
+						return $this->state == 1 && $this->bidding_user_type == DemandTraits::$col[1] && $this->bidding;
 					})
 					->then(function (Grid\Column $column) {
 						$column->append('<a class="btn btn-sm btn-primary" href="'.admin_url('/demand_bidding/create?demand_id='.$this->id).'">发起竞标</a>');