求教 has no method 'start' 的错误是啥问题

[周尉]

求教哪里出错了

require('../lib/jscex.mysql').jscexify(db);
var testAsync = eval(Jscex.compile("async",function(){
    sql = 'select * from '+opt.db_name+'.'+tb_name+' limit 10';
    var ret = $await(db.queryAsync(sql));
}))

testAsync.start();

报错内容如下

node.js:201
        throw e; // process.nextTick error, or 'error' event on first tick
              ^
TypeError: Object function () {
                                                                         var _builder_$0 = Jscex.builders["async"];
                                                                         return _builder_$0.Start(this,
                                                                             _builder_$0.Delay(function () {
/*     sql = "select * from " + opt.db_name + "." + tb_name + " limit 10"; */    sql = "select * from " + opt.db_name + "." + tb_name + " limit 10";
/*     var ret = $await(db.queryAsync(sql)); */                                  return _builder_$0.Bind(db.queryAsync(sql), function (ret) {
                                                                                     return _builder_$0.Normal();
                                                                                 });
                                                                             })
                                                                         );
/* } */                                                              } has no method 'start'
    at Object. (/Users/chatfeed/webroot/SGRPG/ServerCode/server/nodejs/logic/test.js:50:11)
    at Module._compile (module.js:441:26)
    at Object..js (module.js:459:10)
    at Module.load (module.js:348:31)
    at Function._load (module.js:308:12)
    at Array.0 (module.js:479:10)
    at EventEmitter._tickCallback (node.js:192:40)




[Jeffrey Zhao]

没有看出明显问题，不知道你的jscex.mysql是怎么写的呢？

 

Jeffrey Zhao
Blog: http://blog.zhaojie.me/
GitHub: https://github.com/JeffreyZhao

--
 
 
 

[周尉]

我用的是todo那个例子的

var Jscex = require("./jscex/jscex").Jscex;

exports.jscexify = function (db) {
    db.queryAsync = function () {
        var _this = this;

        var args = [];
        for (var i = 0; i < arguments.length; i++) {
            args.push(arguments[i]);
        }


        var delegate = {
            onStart: function (callback) {

                args.push(function (err, result) {
                    if (err) {
                        callback("failure", err);
                    } else {
                        callback("success", result);
                    }
                });

                _this.query.apply(_this, args);
            }
        };

        return new Jscex.Async.Task(delegate);
    }
}

[Jeffrey Zhao]

todo是五百年前的示例了，当时的Jscex还没大举发布，用法不同。

 

现在建议看下文档里的fromCallback和fromStandard方法。

 

老赵 | Jeffrey Zhao
Blog: http://blog.zhaojie.me/
GitHub: http://github.com/JeffreyZhao/

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[Rainbow_sh]

testAsync.start();

这句错了。

应该是：testAsync().start();