我有一个奇怪的问题，我无法理解。我将priceHistories存储在内存中的数组中。当我调用一个get方法时，它不会返回相同的值，这取决于我从哪里调用该方法。
原始属性和方法：

@Injectable()
export class PricehistoryService {

    private readonly logger = new Logger(PricehistoryService.name);
    private priceHistories: PriceHistory[] = [];

    getPriceHistories(): PriceHistory[] {
        this.logger.log(this.priceHistories);
        return this.priceHistories;
    }

....

}

当从这个Controller调用时，它返回完整的历史记录。

@Controller('pricehistory')
export class PricehistoryController {

    private readonly logger = new Logger(PricehistoryController.name);
    constructor(private readonly priceHistoryService: PricehistoryService) {}

    @Get()
    getCompletePriceHistory(): PriceHistory[] {
        this.logger.log('GET REQUEST: Complete price history');
        return this.priceHistoryService.getPriceHistories();
    }
}

预期回报（在上面的Controller调用上工作）：

[
    {
        "naam": "karmeliet",
        "prices": [
            {
                "price": "2.5",
                "timestamp": 1683917722366
            }
        ]
    }
]

但是，当我从另一个Service调用它时，它只返回一个空数组。getPriceHistories()中的日志还显示this.priceHistories是[]。

@Injectable()
export class PricesService {
    private appSettings: AppSettings;
    private readonly logger = new Logger(PricesService.name);

    constructor(private readonly drinksService: DrinksService, private readonly priceHistoryService: PricehistoryService) {
        this.appSettings = {factor: 10, standaardafwijking: 2, minimum: 0.6, maximum: 2.5}
    }

    getCurrentPrices(): CurrentPrice[] {
        this.logger.log("Getting all current prices");
        let currentPrices: CurrentPrice[] = [];
        let priceHistories: PriceHistory[] = this.priceHistoryService.getPriceHistories();
        priceHistories.forEach(priceHistory => {
            let currentPriceTemp: CurrentPrice = {
                naam: priceHistory.naam,
                currentPrice: priceHistory.prices.at(priceHistory.prices.length - 1).price
            };
            currentPrices.push(currentPriceTemp);
        })

        return currentPrices;
    }
....
}

priceHistories这里是[]
编辑1：
显然，从PricesService调用到PricehistoryService或DrinksService的任何方法都会返回一个空数组。当从其他Services调用方法时不会发生这种情况，只有PricesService。