开营时间可以延长，不可以缩短

src/views/course/userCoursePeriod/index.vue

@@ -266,7 +266,6 @@
         </el-form-item>
         <el-form-item label="开营日期" prop="periodStartingTime">
           <el-date-picker
-            :disabled = "isDisabledDateRange"
             :style="{display: form.periodType == 1 ? '' : 'none !important'}"
             v-model="form.dateRange"
             @change="timeChange(1)"
@@ -917,10 +916,13 @@ export default {
           this.form.timeRange = [this.form.viewStartTime, this.form.viewEndTime];
         }
         if(this.form.periodType == 1){
-          this.form.dateRange = [this.form.periodStartingTime, this.form.periodEndTime];
+          // this.form.dateRange = [this.form.periodStartingTime, this.form.periodEndTime];
+          this.$set(this.form,'dateRange',[this.form.periodStartingTime, this.form.periodEndTime])
+          // console.log('this.form.dateRange',this.form.dateRange)
         }
         if(this.form.periodType == 2){
-          this.form.date = this.form.periodStartingTime;
+          this.$set(this.form,'date',this.form.periodStartingTime)
+          // this.form.date = this.form.periodStartingTime;
         }
         this.open = true;
         this.title = "修改会员营期";
@@ -1298,19 +1300,23 @@ export default {
         this.loadingMore = false;
       });
     },
-    timeChange(type){
-      if(type == 1){
+    timeChange(type) {
+      if (type == 1) {
         this.form.periodStartingTime = this.form.dateRange[0];
         this.form.periodEndTime = this.form.dateRange[1];
-         // 转换为天数
+        if (!Array.isArray(this.form.days)) {
+          this.form.days = [];
+        }
+        this.form.days = [];
         let days = this.getDiff(this.form.periodStartingTime, this.form.periodEndTime);
         for (let i = 0; i < days; i++) {
-          this.form.days.push({lesson: i + 1});
+          this.form.days.push({ lesson: i + 1 });
         }
       }
-      if(type == 2){
+      if (type == 2) {
         this.form.periodStartingTime = this.form.date;
         this.form.periodEndTime = this.form.date;
+        this.form.days = [];
       }
     },
     getDiff(start, end) {