How to perform a query with conditional where() clause using Firebase Modular SDK (v9)?
Example query in name-spaced version (v8):
const status = "live"
const publishedAfter = 1630607348811
let q = firebase.firestore().collection("articles")
// filters selected by users
if (status) q = q.where("status", "==", "live")
if (publishedAfter) q = q.where("publishedAt", ">", publishedAfter)
const qSnapshot = await q.get()
Option 1: Conditionally adding QueryConstraint using previous as base
let q = query(collection(firestore, "articles"))
// filters selected by users
if (status) q = query(q, where("status", "==", "live"))
if (publishedAfter) q = query(q, where("publishedAt", ">", publishedAfter))
const qSnapshot = await getDocs(q);
Option 2: Conditionally adding QueryConstraints to an array
const constraints = []
// filters selected by users
if (status) constraints.push(where("status", "==", "live"))
if (publishedAfter) constraints.push(where("publishedAt", ">", publishedAfter))
const q = query(collection(firestore, "articles"), ...constraints)
const qSnapshot = await getDocs(q);