What could be causing me to consistently receive a 0 value despite my collection having content stored within it?

How can I retrieve the value of dropVolume and use it in another method after executing my getAllDropsVolumePerDate(date) function? Each time I try to access dropVolume, it returns a value of 0.

 dropVolume = 0;
  getAllDropsVolumePerDate(date: string) {
    this.campaignService.getAllCampaigns().subscribe((res) => {
      res.forEach((campaign) => {
        campaign.drops.forEach((drop) => {
          if (drop.dropDate === date) {
            this.dropVolume = this.dropVolume + drop.dropVolume;
          }
        });
      });
     return this.dropVolume;
    });
    return this.dropVolume;
  }

Answer №1

Subscriptions operate asynchronously, meaning there may be a delay in receiving a value, even if it is only a matter of milliseconds. Therefore, ensure that your return line is placed within the subscription block to ensure it triggers only after the value has been returned.

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