Question

How can I fetch data synchronously from cordova-sqlite? 我正在解决这个问题。我在脑海中提出了很多问题。为什么sqlite不是序列化模式.Mean：为什么它不是逐行执行..？

我这样解决..

var db = "";
//will create database Dummy_DB or open it

//function will be called when device ready
var caseNames=new Array();
function onDeviceReady() {


    db = window.openDatabase("Casepad", "1.0", "Casepad", 200000);
    if (window.localStorage.getItem("isAddSomeData") == "yes") {

        db.transaction(getallTableData, errorCB);

        /*db.transaction(function (tx) {

 tx.executeSql('SELECT * FROM a', [],
   // tx.executeSql('SELECT EXISTS(SELECT * FROM  b)', [],
              function(tx, results) {
               t=results.rows.length;
               alert(t)
});
    });*/

    }    
}

function insertData() {
    db.transaction(createTable, errorCB, afterSuccessTableCreation);
}

//create table and insert some record
function createTable(tx) {
    tx.executeSql('CREATE TABLE IF NOT EXISTS CaseTable (id INTEGER PRIMARY KEY AUTOINCREMENT, CaseName  VARCHAR(100) unique NOT NULL ,CaseDate INTEGER ,TextArea VARCHAR(200) NOT NULL)');

    tx.executeSql('INSERT OR IGNORE INTO CaseTable(CaseName,CaseDate,TextArea) VALUES ("' + $('.caseName_h').val() + '", "' + $('.caseDate_h').val() + '","' + $('.caseTextArea_h').val() + '")');


}
//function will be called when an error occurred
function errorCB(err) {
    navigator.notification.alert("Error processing SQL: " + err.code);
}

//function will be called when process succeed
function afterSuccessTableCreation() {
    console.log("success!");
    db.transaction(getallTableData, errorCB);
}



//select all from SoccerPlayer
function getallTableData(tx) {

    tx.executeSql('SELECT * FROM CaseTable', [], querySuccess, errorCB);
}


/*function querySuccess(){
for (var i = 0; i < len; i++) {
    alert(result.rows.item(0).CaseName)
        db.transaction(function (tx) {

 tx.executeSql('SELECT * FROM "'+result.rows.item(0).CaseName+'"', [],
   // tx.executeSql('SELECT EXISTS(SELECT * FROM  b)', [],
              function(tx, results) {
               t=results.rows.length;
               alert(t)
});
    });

}

}*/
function querySuccess(tx, result) {

    var len = result.rows.length;
    $('#folderData').empty();
    for (var i = 0; i < len; i++) {

    test=result.rows.item(i).CaseName;
    if(test=="a"){

    var t=Test(test);
     alert("yes" +t)
}


        $('#folderData').append(
                '<li class="caseRowClick" id="' + result.rows.item(i).id + '" data-rel="popup" data-position-to="window">' + '<a href="#">' + '<img src="img/Blue-Folder.png">' + '<h2>' + result.rows.item(i).CaseName + '</h2>' + '<p>' + result.rows.item(i).TextArea + '</p>' + '<p>' + result.rows.item(i).CaseDate + '</p>' + '</a>' + 
                 '<span class="ctrl togg"><fieldset data-role="controlgroup" data-type="horizontal" data-mini="true" ><button class="edit button_design">Edit</button><button class="del button_design">Delete</button></fieldset><span>'+'</li>'
                );
    }
    $('#folderData').listview('refresh');

}

function Test(test){
alert(test)
    db.transaction(function (tx) {
            $yoursql = 'SELECT * FROM  "'+test+'"';
            tx.executeSql($yoursql, [], function (tx, results) {
                return results.rows.length+"TableName"+test;

            });
});

}

运行后我将首先 yesundefined 然后，表名.in console我收到此错误

未捕获错误：无法在初始化之前调用listview上的方法;试图调用方法'刷新'

Answer 1

改变这个：

$('#folderData').listview('refresh');

到此：

$('#folderData').listview().listview('refresh');

在某些情况下，必须先使用 listview() 初始化列表视图，然后才能使用 listview('refresh') 进行刷新。

Answer 2

$('#ID').trigger('create');

然后

$('#ID').append(APPEND_CONTENT).listview('refresh');

（获取错误无法在初始化之前调用listview上的方法;尝试调用方法'refresh'）？

2 个答案: