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我正在使用sqlite作爲其數據源創建一個使用環回脫機同步的科爾多瓦應用程序。這裏是我的代碼:與科爾多瓦sqlite的環回脫機同步
lbclient \ datasources.json:
{
"remote": {
"connector": "remote"
},
"sqlite": {
"connector": "sqlite",
"location": "default",
"file_name": "sqlite.sqlite3",
"debug": false
}
}
lbclient \ lbclient.js:
'use strict';
var loopback = require('loopback');
var boot = require('loopback-boot');
var client = module.exports = loopback();
if (client.connectorRegistry) {
console.log(client.connectorRegistry);
}
client.connector('sqlite', require('loopback-connector-cordova-sqlite'));
boot(client);
在我browser.bundle.js,我注意到,在try塊執行兩次
app.dataSource = function(name, config) {
try {
var ds = dataSourcesFromConfig(name, config, this.connectors, this.registry);
this.dataSources[name] =
this.dataSources[classify(name)] =
this.dataSources[camelize(name)] = ds;
ds.app = this;
return ds;
} catch (err) {
if (err.message) {
err.message = g.f('Cannot create data source %s: %s',
JSON.stringify(name), err.message);
}
throw err;
}
};
這裏的dataSourcesFromConfig:
function dataSourcesFromConfig(name, config, connectorRegistry, registry) {
var connectorPath;
assert(typeof config === 'object',
'can not create data source without config object');
if (typeof config.connector === 'string') {
name = config.connector;
if (connectorRegistry[name]) {
config.connector = connectorRegistry[name];
} else {
connectorPath = path.join(__dirname, 'connectors', name + '.js');
if (fs.existsSync(connectorPath)) {
config.connector = require(connectorPath);
}
}
if (config.connector && typeof config.connector === 'object' && !config.connector.name)
config.connector.name = name;
}
return registry.createDataSource(config);
}
在dataSourcesFromConfig的首次運行時,DB(源碼)被初始化得很好,但在第二輪,我現在得到的錯誤:
browser.bundle.js:93172 Uncaught TypeError: Cannot create data source "sqlite": fs.existsSync is not a function
爲什麼我遇到的是什麼?你能幫我麼。非常感謝。