优化 编辑时时间制约逻辑

@@ -836,18 +836,26 @@ Page({
         studystartdate.datelong = data.education_start
         setData.studystartdate = studystartdate
         var studyEndDate = this.data.studyEndDate
+        var studyPeriodDate = this.data.studyPeriodDate
         if (data.education_end > 0) {
           studyEndDate.selected = format.formatTime_month(data.education_end)
           studyEndDate.datelong = data.education_end
-          setData.studyEndDate = studyEndDate
         }
-        var studyPeriodDate = this.data.studyPeriodDate
         if (data.education_period_end > 0){
           studyPeriodDate.selected = format.formatTime_month(data.education_period_end)
           studyPeriodDate.datelong = data.education_period_end
         }
-        studyPeriodDate.start = studystartdate.selected
+        var start = studystartdate.selected, select_year = 0
+        if (start.length > 4) {
+          select_year = start.substring(0, 4)
+        } 
+        if (select_year < 2019) {
+          start = '2019-01'
+        }
+        studyEndDate.start = start
+        studyPeriodDate.start = start
         studyPeriodDate.end = studyEndDate.selected
+        setData.studyEndDate = studyEndDate
         setData.studyPeriodDate = studyPeriodDate
         setData.deduction_amount = data.deduction_amount
         if (data.children_id_card_no && data.children_id_card_no.length) {