在设置我的应用程序时,我收到此错误,创建本地数据库并简单地插入第一个也是唯一的用户(谁已登录本地).请在代码中看到我收到错误消息的地方的注释.
angular.module("greenApp")
.service("dbService",['$q',function($q){
var db;
var promise = function(){
var deferred = $q.defer();
db = window.openDatabase('greenDB','1.0','Green Database',2*1024*1024);
db.transaction(function(tx){
tx.executesql("CREATE TABLE IF NOT EXISTS user (user TEXT PRIMARY KEY) ")
},function(err){
alert('Something went wrong... Error: DATABASE INIT ' + err);
},function(scc){
deferred.resolve();
})
return deferred.promise;
}
promise();
var query = function(sql,args) {
var deferred = $q.defer();
db.transaction(function(tx) {
tx.executesql(sql,args,function(tx,results) {
deferred.resolve(results);
});
},function(err) {
deferred.reject(err);
});
return deferred.promise;
};
var insert_into = function(args) {
var queryPromise = query("INSERT INTO user (user) VALUES (?)",args);
console.log("in insert_into",queryPromise) // Error message comes here
return queryPromise;
};
return {
promise: promise,insert_into: insert_into,};
}]);
其中args只是[“user-name-string”],我收到一条错误消息：
“could not execute statement due to a constaint failure (19 UNIQUE
constraint Failed: user.user)
任何可能发生的想法？完全相同的代码正在运行,并在最近刚刚移植到Ionic的纯科尔多瓦项目中工作.
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