我正在使用InversifyJS来设置某种动态绑定并在NodeJS上运行它。我遇到的问题是我得到错误，但没有消息，只有堆栈跟踪。
Main班
export class Main {
public static getCalculator(config: string): Calculator {
try {
var container: Container = new KeyFeatureContainer(config).getContainer();
debugger;
// error here !
return container.get<Calculator>(TYPES.Calculator);
} catch (error) {
debugger;
return null;
}
}
}
此类使用KeyFeatureContainer字符串调用json，用于配置所有绑定（以动态排序方式），然后检索容器。
KeyFeatureContainer班
export class KeyFeatureContainer {
private _container: Container;
public constructor(config: string) {
var jsonConfig: any[] = JSON.parse(config);
this._container = new Container();
this._container.bind<Calculator>(TYPES.Calculator).to(KeyFeatureCalculator);
for (var i = 0; i < jsonConfig.length; i++) {
if (jsonConfig[i].active) {
this.parseConfigKeyFeatures(jsonConfig[i].id);
this.parseConfigParams(jsonConfig[i].params);
}
}
}
public getContainer(): Container {
debugger;
return this._container;
}
private parseConfigKeyFeatures(id: string): void {
var keyFeatureContainerModule: ContainerModule = rootContainer.get<KeyFeatureContainerModule>(id).getContainerModule();
if (keyFeatureContainerModule != null)
this._container.load(keyFeatureContainerModule);
}
private parseConfigParams(params: Array<{ name: string, value: any }>): void {
for (var param of params)
this._container.bind(param.name).to(param.value);
}
}
此类接收json配置，并在ID之后加载ContainerModule，其中包含接口与具体实现之间的绑定。 rootContainer指定要在ID后检索的ContainerModule。
rootContainer
var rootContainer: Container = new Container();
rootContainer.bind<KeyFeatureContainerModule>(KEYFEATURES.DrugHoliday).to(DrugHolidayContainerModule);
rootContainer.bind<KeyFeatureContainerModule>(KEYFEATURES.MissingDay).to(MissingDayContainerModule);
export default rootContainer;
相关的ContainerModule s（第二个是相同的，只是每个不同的PARAMS）
@injectable()
export class MissingDayKeyFeature implements KeyFeature {
@inject(PARAMS.MissingDayParams.NbIntakesLimit)
private _nbIntakesLimit: number;
@inject(PARAMS.MissingDayParams.ExtraParamA)
private _extraParamA: any;
@inject(PARAMS.MissingDayParams.ExtraParamB)
private _extraParamB: any;
public init(): void {
console.log("init() at MissingDay");
console.log("nbIntakesLimit = " + this._nbIntakesLimit);
console.log("extraParamA = " + this._extraParamA);
console.log("extraParamB = " + this._extraParamB);
}
public calculate(): void {
console.log("calculate() at MissingDay");
}
public finish(): void {
console.log("finish() at MissingDay");
}
}
@injectable()
export class MissingDayContainerModule implements KeyFeatureContainerModule {
public getContainerModule(): ContainerModule {
return new ContainerModule((bind: interfaces.Bind, unbind: interfaces.Unbind) => {
bind<KeyFeature>(TYPES.KeyFeature).to(MissingDayKeyFeature);
});
}
}
最后，ServiceIdentifiers用于设置整个（分隔文件）
let TYPES = {
KeyFeature: "KeyFeature",
Calculator: "Calculator"
}
export default TYPES;
let PARAMS = {
DrugHolidayParams: {
NbDaysLimit: "nbDaysLimit",
ExtraParamA: "extraParamDHA",
ExtraParamB: "extraParamDHB"
},
MissingDayParams: {
NbIntakesLimit: "nbIntakesLimit",
ExtraParamA: "extraParamMDA",
ExtraParamB: "extraParamMDB"
}
}
export default PARAMS;
let KEYFEATURES = {
MissingDay: "MissingDayKeyFeature",
DrugHoliday: "DrugHolidayKeyFeature"
}
export default KEYFEATURES;
最后输入JSON（为方便起见而设计）
[{
"id": "DrugHolidayKeyFeature",
"active": true,
"params": [{
"name": "nbDaysLimit",
"value": 3
}, {
"name": "extraParamDHA",
"value": "DHA"
}, {
"name": "extraParamDHB",
"value": "DHB"
}
]
}, {
"id": "MissingDayKeyFeature",
"active": false,
"params": [{
"name": "nbIntakesLimit",
"value": 0
}, {
"name": "extraParamMDA",
"value": "MDA"
}, {
"name": "extraParamMDB",
"value": "MDB"
}
]
}
]
我使用简单的Test脚本来输出值并查看是否所有绑定都正确完成
import { Main } from "./Main";
var json: string = *json above*;
Main.getCalculator(json).calculate();
但我最终得到了这个错误
Error
< at _createSubRequests (D:\Projects\226RD\nodejs\phantomjs_2016_by_DM\final\node_modules\inversify\lib\planning\planner.js:106:19)
< at Object.plan (D:\Projects\226RD\nodejs\phantomjs_2016_by_DM\final\node_modules\inversify\lib\planning\planner.js:125:5)
< at D:\Projects\226RD\nodejs\phantomjs_2016_by_DM\final\node_modules\inversify\lib\container\container.js:205:37
< at Container._get (D:\Projects\226RD\nodejs\phantomjs_2016_by_DM\final\node_modules\inversify\lib\container\container.js:198:44)
< at Container.get (D:\Projects\226RD\nodejs\phantomjs_2016_by_DM\final\node_modules\inversify\lib\container\container.js:163:21)
< at Function.getCalculator (D:\Projects\226RD\nodejs\phantomjs_2016_by_DM\final\transpiled\KFCalc\Main.js:9:30)
< at Object.<anonymous> (D:\Projects\226RD\nodejs\phantomjs_2016_by_DM\final\transpiled\KFCalc\Test.js:4:13)
< at Module._compile (module.js:573:32)
< at Object.Module._extensions..js (module.js:582:10)
< at Module.load (module.js:490:32)
对于发生的事情一无所知，我无法弄清楚我做错了什么。我不能get<Calculator>也不能get<KeyFeature>，但如果我这样做：
container.isBound(TYPES.Calculator) // returns true !!!
同样适用于所有绑定项目。
感谢您的任何指示，我没有想法。
+-- @types/node@7.0.2
+-- inversify@3.0.0
+-- reflect-metadata@0.1.9
+-- typescript@2.0.10
编辑：忘记KeyFeatureCalculator
@injectable()
export class KeyFeatureCalculator implements Calculator {
// multi-injection of bound key features
private _keyFeatureCalculators: KeyFeature[] = [];
public constructor(@multiInject(TYPES.KeyFeature) keyFeatureCalculators: KeyFeature[]) {
this._keyFeatureCalculators = keyFeatureCalculators;
}
public calculate(): void {
console.log("calculate() at KeyFeatureCalculator");
for (var calculator of this._keyFeatureCalculators) {
calculator.init();
calculator.calculate();
calculator.finish();
}
}
}
此外，我的所有文件（或几乎）从inject, injectable导入inversify并导入reflect-metadata
答案 0 :(得分：1)
错误已解决：对于那些没有注意的人，每个KeyFeature对象都会注入其属性，其类型为number或any。由于值是从我的JSON检索的，因此它们被输入为any，因此编译器不会警告我绑定bind(xxx).to(yyy)需要为newable元素！
因此，在我的示例中，yyy类似3，这是一个数字，因此无法限制。我改为bind(xxx).toConstantValue(yyy)，一切正常！