我首先使用包含4个列的1个表的数据库运行我的应用程序,然后我升级并添加了一个新列,它运行良好。然后,我从模拟器中卸载了我的应用程序,然后重新安装了它。当我尝试向该表中插入新数据时,未找到新添加的列。 我正在使用sqflite,这是我的代码:
@Controller
public class SpringController {
@RequestMapping(value="/tank", method = RequestMethod.GET)
public String loadData(Model model){
Tankstelle[] data = TankerAPI.getTankData(lat, lng, 5, sort, type);
model.addAllAttributes(convertdata("name", data));
model.addAllAttributes(convertdata("dist", data));
model.addAllAttributes(convertdata("price", data));
return "home";
}
@RequestMapping(value = "/tank", method = RequestMethod.POST)
public String getChangedData(@RequestBody JSONObject incomingjson) {
lat = Float.parseFloat(incomingjson.get("lat").toString());
lng = Float.parseFloat(incomingjson.get("lng").toString());
BigDecimal biglat = new BigDecimal(lat).setScale(3, RoundingMode.HALF_UP);
BigDecimal biglng = new BigDecimal(lng).setScale(3, RoundingMode.HALF_UP);
lat = biglat.floatValue();
lng = biglng.floatValue();
sort = "price"; //for seeing a difference
System.out.println(incomingjson.get("lat")+" "+incomingjson.get("lng"));
return "test"; //here it should return the template "test" but it return "home"
}
我得到了这个例外:
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org/">
<head>
<meta charset="UTF-8"/>
<title>guenstigertanken.de</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<style>...
</style>
</head>
<body onload="getLocation()">
<div class="ueberschriftbox"></div>
<h2 class="header">guenstigertanken.de</h2>
<h2 class="subheader">Wir finden die günstigsten Spritpreise für Sie</h2>
<div class="backrounding">
<div class="steuerelementebox"></div>
<div class="steuerelementespritsorteueberschrift">
<h2>Spritsorte</h2>
<label class="container1">Super E5
<input type="radio" id="E5" name="radio1" onclick="autoSubmit()">
<span class="checkmark1"></span>
</label>
<label class="container1">Super E10
<input type="radio" id="E10" name="radio1" onclick="autoSubmit()">
<span class="checkmark1"></span>
</label>
<label class="container1">Diesel
<input type="radio" id="Diesel" name="radio1" onclick="autoSubmit()">
<span class="checkmark1"></span>
</label>
</div>
<div class="steuerelementesortierennachueberschrift">
<h2>Sortieren nach</h2>
<label class="container2">Preis aufsteigend
<input type="radio" checked="checked" name="radio2" onclick="autoSubmit()">
<span class="checkmark2"></span>
</label>
<label class="container2">Preis absteigend
<input type="radio" name="radio2" onclick="autoSubmit()">
<span class="checkmark2"></span>
</label>
<label class="container2">Distanz aufsteigend
<input type="radio" name="radio2" onclick="autoSubmit()">
<span class="checkmark2"></span>
</label> <label class="container2">Distanz absteigend
<input type="radio" name="radio2" onclick="autoSubmit()">
<span class="checkmark2"></span>
</label>
<label class="container2" id="alph">Name alphabetisch
<input type="radio" name="radio2" onclick="autoSubmit()">
<span class="checkmark2"></span>
</label>
</div>
<div class="buttonsbox"></div>
<div class="tabellenbox"></div>
<div class="ueberuns">
<p>Über uns</p>
</div>
<div class="agb">
<p>AGB</p>
</div>
<div class="datenschutz">
<p>Datenschutz</p>
</div>
<div class="impressum">
<p>Impressum</p>
</div>
<div class="left show">
<table id="datatable">
<thead>
<tr> <th>Name</th> <th>Entfernung</th> <th>Preis</th> <th>Favorit</th> </tr>
</thead>
<tbody>
<tr> <td th:text="${name1}">AGIP</td> <td th:text="${dist1}">7km</td> <td th:text="${price1}">1,20€</td> <td><input type="checkbox"></td> </tr>
<tr> <td th:text="${name2}">Aral</td> <td th:text="${dist2}">12km</td> <td th:text="${price2}">1,23€</td> <td><input type="checkbox"></td> </tr>
<tr> <td th:text="${name3}">Esso</td> <td th:text="${dist3}">2km</td> <td th:text="${price3}">1,25€</td> <td><input type="checkbox"></td> </tr>
<tr> <td th:text="${name4}">Esso</td> <td th:text="${dist4}">10km</td> <td th:text="${price4}">1,25€</td> <td><input type="checkbox"></td> </tr>
<tr> <td th:text="${name5}">Esso</td> <td th:text="${dist5}">5km</td> <td th:text="${price5}">1,25€</td> <td><input type="checkbox"></td> </tr>
<tr> <td th:text="${name6}">BP</td> <td th:text="${dist6}">13km</td> <td th:text="${price6}">1,35€</td> <td><input type="checkbox"></td> </tr>
<tr> <td th:text="${name7}">BP</td> <td th:text="${dist7}">13km</td> <td th:text="${price7}">1,35€</td> <td><input type="checkbox"></td> </tr>
<tr> <td th:text="${name8}">BP</td> <td th:text="${dist8}">13km</td> <td th:text="${price8}">1,35€</td> <td><input type="checkbox"></td> </tr>
</tbody>
</table>
</div>
</div>
<a class="cssbuttonfavoriten" href="test.html">Favoriten></a>
<a class="cssbuttonleaderboard" href="test.html">Leaderboard></a>
<a class="cssbuttonstatistiken" href="test.html">Statistiken></a>
<script>
function getLocation() {
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(showPosition);
} else {
}
}
function showPosition(position) {
var posdata = '{"lat":"'+position.coords.latitude+'","lng":"'+position.coords.longitude+'","typeselect":"'+type+'"}';
$.ajax({
type: 'post',
url: '/tank',
data: JSON.stringify(posdata),
contentType: "application/json; charset=utf-8",
traditional: true,
success: function(posdata) {
//alert("ajax success: refresh page to sort after price[prob current setting]")
},
error: function(){
alert("ajax error")
}
});
}
</script>
</body>
</html>
请提出建议。