问个 egg 加载 controller 的 this 指向问题

ret[key] = methodToMiddleware(Controller, key);
function methodToMiddleware(Controller, key) {
    return function classControllerMiddleware(...args) {
        const controller = new Controller(this);
        if (!this.app.config.controller || !this.app.config.controller.supportParams) {
            args = [this];
        }
        return utils.callFn(controller[key], args, controller);
    };
}

const controller = new Controller(this); 这个 this 怎么会指向 context .

yviscool 1楼•7 年前作者

找到了。。。

function convertMiddlewares(middlewares, app) {
  // ensure controller is resolved
  const controller = resolveController(middlewares.pop(), app);
  // make middleware support generator function
  middlewares = middlewares.map(utils.middleware);
  const wrappedController = (ctx, next) => {
    return utils.callFn(controller, [ ctx, next ], ctx);
  };
  return middlewares.concat([ wrappedController ]);
}