使用Inversify执行具有常量和注入参数的类的多项目

时间:2017-10-20 10:10:23

标签: typescript inversifyjs

我有一个名为insuranceController的Typescript类,它接受一个多注入参数,如下所示:

@injectable()
export class InsuranceController implements IInsuranceController {
    private policies: IInsurancePolicy[];

    constructor(@multiInject("IInsurancePolicy") policies: IInsurancePolicy[]) {
        this.policies = policies;
    }
}

insurancePolicy类需要一个数字作为构造函数参数

@injectable()
export class InsurancePolicy implements IInsurancePolicy{
    constructor(public index: number) {
    }
}

所以我按如下方式创建绑定:

this.container.bind<IInsurancePolicy>("IInsurancePolicy").toConstantValue(new InsurancePolicy(0));
this.container.bind<IInsurancePolicy>("IInsurancePolicy").toConstantValue(new InsurancePolicy(1));
this.container.bind<IInsurancePolicy>("IInsurancePolicy").toConstantValue(new InsurancePolicy(2));

这一切都很棒。但是我现在想在insurancePolicy类中注入第二个参数:

    constructor(public index: number,
        @inject("IIntakeLayout") intakeLayout: IIntakeLayout) {
    }

我该怎么做?我已经尝试过查看这里概述的技术:InversifyJS Injecting Literal Constructor Parameters,但我看不出它们如何在多项目场景中工作。请注意,InsuranceController本身是注入的,因此我无法手动创建它。我应该如何使用Inversify进行此操作?

1 个答案:

答案 0 :(得分:2)

您可以创建使用toDynamicValue的辅助函数:

function registerInsurancePolicy(ctr: Container, id: number) {
  ctr.bind<IInsurancePolicy>("IInsurancePolicy")
     .toDynamicValue((context) => {
        cosnt intakeLayout = context.container.get<IIntakeLayout>("IIntakeLayout");
        return new InsurancePolicy(id, intakeLayout);
     })
     .inSingletonScope();
}

然后使用帮助器:

registerInsurancePolicy(this.container, 1);
registerInsurancePolicy(this.container, 2);
registerInsurancePolicy(this.container, 3);