What is the best way to retrieve the value of an observable?

Question

What is the best way to retrieve the value of an observable?

I am trying to retrieve the value of totalDeals and then implement a check to see if it is greater than 0, but I keep encountering the following error :

Operator '>' cannot be applied to types 'Subscription' and 'number'.ts(2365)

https://i.sstatic.net/bxOH4.png

code

ngOnInit(): void {
  this.leaseId = this.transaction.leaseId;

  this.getAllDealsCount();
}

getAllDealsCount() {
  let totalDeals = zip(this.getCount('ForApproval'),this.getCount('Draft'))
  .subscribe(res => this.totalDeals = res[0].data + res[1].data)
}

private getCount(item: any) {
  let status = item;
  return this.dealService.getCount(
        this.accountId,
        this.transaction.id,
        status
  )
}

angular typescript

Answer 1

Answer №1

fetchDeals() {
    const result = combineLatest(
        this.fetchData('ApprovedDeals'), // data fetching method 1
        this.fetchData('PendingDeals') // data fetching method 2
    );

    // handle the combined result 
    result.subscribe((response: any[]) => {
      const approvedDeals = response[0]?.data;
      const pendingDeals = response[1]?.data;
     
      this.totalDealsCount = approvedDeals + pendingDeals;
       
       if (approvedDeals > 0) {
          // ... perform certain actions
       }

       if (pendingDeals > 0) {
         // ... take specific steps
       }

       if (this.totalDealsCount > 0) {
          // execute a function based on total deals count
       }
    }); 
}

Answer 2

fetchDeals() {
    const result = combineLatest(
        this.fetchData('ApprovedDeals'), // data fetching method 1
        this.fetchData('PendingDeals') // data fetching method 2
    );

    // handle the combined result 
    result.subscribe((response: any[]) => {
      const approvedDeals = response[0]?.data;
      const pendingDeals = response[1]?.data;
     
      this.totalDealsCount = approvedDeals + pendingDeals;
       
       if (approvedDeals > 0) {
          // ... perform certain actions
       }

       if (pendingDeals > 0) {
         // ... take specific steps
       }

       if (this.totalDealsCount > 0) {
          // execute a function based on total deals count
       }
    }); 
}

What is the best way to retrieve the value of an observable?

Answer №1

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