How To Get A Document From A Collection Based On A Particular Field In That Document

const docRef = firestore.collection('orders').document('') I need to get the document '147OiRKFYKA3WAo5d5mk' if the field value is Admno:'11.11.1111' here is my database Thankyo

Solution 1:

This case is mentioned in the official Firestore documentation:

db.collection("orders").where("Admno", "==", "11.11.1111")
    .get()
    .then(function(querySnapshot) {
        querySnapshot.forEach(function(doc) {
            console.log(doc.id, " => ", doc.data()); //here's your doc
        });
    })
    .catch(function(error) {
        console.log("Error getting documents: ", error);
    });

I strongly recommend reading the documentation if you're getting started with Firestore.