Comparing dates with Firestore timestamp in queries using TypeScript: A comprehensive guide

I have been struggling with comparing dates from my calendar app to dates stored in Firestore. The issue arises because Firestore returns timestamps, and I need to compare them to regular Date objects.

Is there a workaround for this problem? Can something like the following code snippet work?

async function getBaristaShift(date: Date, db: Firestore) {
 date.setHours(0, 0, 0, 0);
 const shiftsRef = collection(db, "shifts");
 const queryStatement = query(shiftsRef, where("date", "==", date)
}
getBaristaShift(new Date(now), dbRef);

It seems that this approach won't yield any results due to the mismatch in date formats between the calendar date and the timestamp in Firestore.

Answer №1

Firestore timestamps are incredibly precise, down to the nano-second, marking a specific moment in time. When querying these timestamps, it's crucial to match the exact stored value in your database.

Although this is feasible, it's more common to use relational operators like >, >=, <, and <= when querying timestamp fields. For instance, if you want to retrieve documents with the same date:

var nextDay = Date();
nextDay.setDate(date.getDate() + 1);

Subsequently:

query(
  eventsRef, 
  where("date", ">=", date),
  where("date", "<", nextDay)
)

Answer №2

To convert a date to Firebase Firestore Timestamp, you can utilize the firebase.firestore.Timestamp.fromDate(date) method. For more details, check out this link.

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