没有优惠券时，不加载优惠劵状态

@@ -581,60 +581,63 @@ $(function() {
         couponIds.push($(this).attr('data-id'));
     });
 
-    $.ajax({
-        type: 'GET',
-        url: '/product/students/userAcquireStatus',
-        data: {
-            couponIds: couponIds
-        },
-        success: function(res) {
-            var code = res.code,
-                i,
-                text,
-                $a;
-
-            if (code === 200) {
-                for (i = 0; i < res.data.length; i++) {
-                    $a = $('[data-id=\'' + res.data[i].couponId + '\']');
-
-                    text = '';
-
-                    if (res.data[i].status === 1) {
-                        text = '<div class="normal">' +
-                                '<p>点击</p>' +
-                                '<p>领取</p>' +
-                                '</div>';
-                    }
-                    if (res.data[i].status === 2) {
-                        $a.removeClass('enable');
-                        text = '<div class="empty">' +
-                                '<p>已抢光</p>' +
-                                '<p class="guang">去逛逛</p>' +
-                                '</div>';
-                    }
-                    if (res.data[i].status === 3) {
-                        $a.removeClass('enable');
-                        text = '<div class="got">' +
-                                '<p>已领取</p>' +
-                                '<p class="guang">去使用</p>' +
-                                '</div>';
-                    }
-                    if (res.data[i].status === 4) {
-                        $a.removeClass('enable');
-                        text = '<div class="normal">' +
-                                '<p>已过期</p>' +
-                                '<p class="guang">去逛逛</p>' +
-                                '</div>';
+    if (couponIds.length > 0) {
+        
+        $.ajax({
+            type: 'GET',
+            url: '/product/students/userAcquireStatus',
+            data: {
+                couponIds: couponIds
+            },
+            success: function(res) {
+                var code = res.code,
+                    i,
+                    text,
+                    $a;
+
+                if (code === 200) {
+                    for (i = 0; i < res.data.length; i++) {
+                        $a = $('[data-id=\'' + res.data[i].couponId + '\']');
+
+                        text = '';
+
+                        if (res.data[i].status === 1) {
+                            text = '<div class="normal">' +
+                                    '<p>点击</p>' +
+                                    '<p>领取</p>' +
+                                    '</div>';
+                        }
+                        if (res.data[i].status === 2) {
+                            $a.removeClass('enable');
+                            text = '<div class="empty">' +
+                                    '<p>已抢光</p>' +
+                                    '<p class="guang">去逛逛</p>' +
+                                    '</div>';
+                        }
+                        if (res.data[i].status === 3) {
+                            $a.removeClass('enable');
+                            text = '<div class="got">' +
+                                    '<p>已领取</p>' +
+                                    '<p class="guang">去使用</p>' +
+                                    '</div>';
+                        }
+                        if (res.data[i].status === 4) {
+                            $a.removeClass('enable');
+                            text = '<div class="normal">' +
+                                    '<p>已过期</p>' +
+                                    '<p class="guang">去逛逛</p>' +
+                                    '</div>';
+                        }
+
+                        $a.find('.info').html(text);
                     }
 
-                    $a.find('.info').html(text);
                 }
-
+            },
+            error: function() {
             }
-        },
-        error: function() {
-        }
-    });
+        });
+    }
 
     if ($('#identity-success').length > 0) {
         // xls-4学生认证成功埋点