exports.saveUserInterfaceConfig = function(req,res){
var body = req.body;
console.log('body:['+JSON.stringify(body)+']');
var mysql = require('mysql');
var UiConfigId = [];
var connection = getDBConnection();
if(body && connection){
connection.beginTransaction(function(err){
if (err) {
/*var errorObj = {error:{code:0, text:'backend error'}};
return res.json(200, errorObj);*/
throw err;
}
var companyId = body.companyId;
var moduleId = body.moduleId;
var submoduleId = body.submoduleId;
var formfieldsId = body.formfieldsId;
for(var index3 in formfieldsId){
var UIConfigInfo = {Company_CompanyId: companyId, Modules_ModuleId: moduleId, SubModule_SubModuleId: submoduleId, SubmoduleFieldConfig_SubmoduleFieldConfigId: formfieldsId[index3]};
var saveUIConfigQuery = 'INSERT INTO ui_config SET ?';
connection.query(saveUIConfigQuery, UIConfigInfo, function(err, result) {
if (err) {
return connection.rollback(function() {
throw err;
});
}
UiConfigId.push(result.insertId);
console.log('result:['+JSON.stringify(result)+']');
connection.commit(function(err) {
if (err) {
return connection.rollback(function() {
connection.end(function(err) {
// The connection is terminated now
});
throw err;
});
} else {
connection.end(function(err) {
// The connection is terminated now
});
}
return res.json(200,{UiConfigId: UiConfigId});
console.log('UiConfigId:['+JSON.stringify(UiConfigId)+']');
console.log('success!');
// connection.release();
});
})
}
})
}
}
我在上面的Node API中有上述信息。我不得不在循环中多次执行相同的查询。但即时通讯面临的问题放在返回声明,即时获取以下错误。发送后无法设置标题返回res.json
错误:发送后无法设置标题。 at ServerResponse.OutgoingMessage.setHeader(_http_outgoing.js:335:11)
如何解决?
感谢您的解释。我如何解决它? –
使用回调为..建议它,当然你会得到一个想法.. https://mostafa-samir.github.io/async-iterative-patterns-pt1/ – Trojan