优化运费计算sql查询量

app/Services/ShippingService.php

@@ -17,18 +17,21 @@ class ShippingService
     public function countShippingAmount(int $weight, int $totalAmount, int $templateId, int $zoneId)
     {
         $shipping_amount = 0;
-        //获取运费规则；
-        $rules = ShippingRule::with('zones')->where('template_id', $templateId)->get();
         $canShipping = true;//是否支持寄送
+
         //如果该模板下无运费规则，则直接包邮
-        if ($rules->count() > 0) {
+        if (ShippingRule::where('template_id', $templateId)->count() > 0) {
+            //只拿有这个地区配置的模板规则，减少sql查询市区数量
+            $rules = ShippingRule::with('zones')->where('template_id', $templateId)->whereHas('zones', function ($q) use ($zoneId) {
+                return $q->where('zones.id', $zoneId);
+            })->get();
             //按包邮/计重
             $rules = $rules->sortBy('type');//优先计算包邮
             foreach ($rules as $rule) {
                 $canShipping = false;
                 $_ruleInfo = json_decode($rule->info, true);
 
-                if (in_array($zoneId, $rule->zones->pluck('id')->toArray())) {
+                // if (in_array($zoneId, $rule->zones->pluck('id')->toArray())) {
                 $canShipping = true;
                 if ($rule->type == ShippingRule::TYPE_FREE) {
                     if ($totalAmount >= bcmul($_ruleInfo['threshold'], 100)) {//在包邮价格范围内
@@ -48,7 +51,7 @@ class ShippingService
                         break;
                     }
                 }
-                }
+                // }
             }
         }
         if (!$canShipping) {