科尔多瓦SQLite的:无法读取空的财产“交易” [英] Cordova SQLite: Cannot read property 'transaction' of null
问题描述
我想的SQLite融入我的离子型应用程序,但我不断收到无法读取空的财产交易
,而通过浏览器,远程调试或测试时试图查询DB中的装置上的数据。
I am trying to integrate SQLite into my Ionic app, but I keep getting Cannot read property 'transaction' of null
while remote debugging or testing via the browser, when trying to query the DB for data on the device.
所以,我已经分手了我所有的configs,控制器和工厂到单独的文件,所有的功能/模块的组合,所以我注入每个模块的配置文件到主应用程序,然后在配置文件里我注入控制器和工厂。
So I have split up all of my configs, controllers and factories into separate files, all grouped by feature / module, so I inject each module's config file into the main app, and then inside of the config file I inject the controller and factory.
我不知道,我已经构造的应用程序可能会被打破的东西吗?顺便
I am not sure if the way that I've structured the app might be breaking something?
下面我列出所有涉及的相关文件,
Below I've listed all of the relevant files involved,
app.js 的
app.js
var app = angular.module('app', ['ionic', 'ngCordova', 'app.config', 'login.config']);
app.run(['$rootScope', '$ionicPlatform', 'DB', function($rootScope, $ionicPlatform, DB) {
$ionicPlatform.ready(function() {
if (window.cordova && window.cordova.plugins.Keyboard) {
cordova.plugins.Keyboard.hideKeyboardAccessoryBar(true);
}
if (window.StatusBar) {
StatusBar.styleDefault();
}
if(navigator.splashscreen) {
navigator.splashscreen.hide();
}
DB.init();
});
}]);
app.config.js 的
app.config.js
var app = angular.module('app.config', ['app.controller', 'app.factory']);
app.config(function($stateProvider, $urlRouterProvider, $httpProvider) {
$stateProvider
.state('app', {
url: "/app",
abstract: true,
templateUrl: "templates/menu.html",
controller: 'appController'
});
$urlRouterProvider.otherwise('/login');
});
app.constant('DB_CONFIG', {
name: 'database.db',
tables: [
{
name: 'users',
columns: [
{name: 'id', type: 'integer primary key'},
{name: 'username', type: 'text'},
{name: 'password', type: 'text'},
{name: 'api_key', type: 'text'},
{name: 'active', type: 'integer'}
]
}
]
});
app.factory.js 的
app.factory.js
var appFactory = angular.module('app.factory', []);
appFactory.factory('DB', ['$q', '$cordovaSQLite', 'DB_CONFIG', function($q, $cordovaSQLite, DB_CONFIG) {
var db = null;
var init = function() {
db = $cordovaSQLite.openDB({ name: DB_CONFIG.name });
// I use this when testing in browser db = window.openDatabase(DB_CONFIG.name, '1.0', 'database', -1);
_.each(DB_CONFIG.tables, function(table) {
var columns = [];
_.each(table.columns, function(column) {
columns.push(column.name + ' ' + column.type);
});
var sql = 'CREATE TABLE IF NOT EXISTS ' + table.name + ' (' + columns.join(',') + ')';
console.log('Table ' + table.name + ' initialized');
query(sql);
});
};
var query = function(sql, bindings) {
bindings = typeof bindings !== 'undefined' ? bindings : [];
return $cordovaSQLite.execute(db, sql, bindings);
};
var fetchAll = function(result) {
var output = [];
for (var i = 0; i < result.rows.length; i++) {
output.push(result.rows.item(i));
}
return output;
};
var fetch = function(result) {
return result.rows.item(0);
};
return {
init: init,
query: query,
fetchAll: fetchAll,
fetch: fetch
};
}]);
login.config.js 的
login.config.js
var loginConfig = angular.module('login.config', ['ionic', 'login.controller']);
loginConfig.config(function($stateProvider) {
$stateProvider
.state('login', {
url: "/login",
templateUrl: "modules/login/views/login.html",
controller: 'loginController'
});
});
login.controller.js 的
login.controller.js
var loginController = angular.module('login.controller', []);
loginController.controller('loginController', ['$scope', '$state', 'DB', function($scope, $state, DB) {
$scope.doLogin = function() {
var username = this.username;
var password = this.password;
DB.query('SELECT * FROM users WHERE username = ? and password = ?', [username, password]).then(function(result){
console.log(result);
}, function(error){
console.log(error);
});
};
}]);
用户已经被插入到数据库中,有时它的工作原理,而我得到的返回结果,它没有大部分时间,我也得到了上述的错误。
The user has already been inserted into the database, and sometimes it works, and I get the results back, most times it doesn't, and I get the above mentioned error.
我假定这是因为数据库没有及时初始化之前,我查询数据库?
I am assuming this is because the DB is not initialising in time, before I query the database?
如果是这样,是有办法,我可以100%肯定,在我查询它的数据库已加载?
If so, is there a way that I can make 100% sure that the database has loaded before I query it?
推荐答案
我曾经同样的问题删除您sqlLite插件,然后重新添加
问题解决了!
i had same problem remove your sqlLite plugin and add it again problem solved!!!
科尔多瓦插件RM io.litehelpers.cordova.sqlite
科尔多瓦插件添加io.litehelpers.cordova.sqlite
cordova plugin rm io.litehelpers.cordova.sqlite cordova plugin add io.litehelpers.cordova.sqlite
这篇关于科尔多瓦SQLite的:无法读取空的财产“交易”的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!