Question 118945 in Firebase Question posted in
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Firebase – it is possible to know the field value in .where() before .get()

Simply I have the following query method:

 FirebaseFirestore.instance.collection('users')
            .where('count', isEqualTo: // here I need to use the current field value + 50 for example){...}

Is there a way to do that in the same query?

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2

Answers


  1. 0

    There is no way to do that, You have to use .get or .snapshots to get documents first then get the field value.

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  2. 0

    Yes, you can use a transaction. Transactions are helpful when you want to update the value of a field based on its current value. This means that when you perform a transaction, you can read the value in the field first, then you can perform some logic and in the end, you can finally commit the transaction.

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