修改了座位等级中文问题、空订单问题

Project/Service/func/search.py

@@ -1,4 +1,4 @@
-from flask import render_template, request, g, abort, redirect, url_for
+from flask import render_template, request, g, abort, redirect, url_for, flash
 from .config import db
 from .utils import get_cities
 import pymysql
@@ -13,6 +13,10 @@ def search():
     departure_date = request.args.get('departure-date')
     passengers = int(request.args.get('passengers', 1))
 
+    if not departure_city or not destination_city or not departure_date or not passengers:
+        flash("请填写所有查询条件", "error")
+        return render_template('search.html', cities=get_cities(), flights=[], username=g.name)
+
     # Date validation
     try:
         departure_date_obj = datetime.datetime.strptime(departure_date, '%Y-%m-%d').date()