I have this useDocument Hook to fetch a single document from a Firebasev9 by passing id of the document. Can I get the document by passing a slug instead of id?
useDocument Hook
import { useEffect, useState } from "react"
// firebase import
import { doc, onSnapshot } from "firebase/firestore"
import { db } from "../firebase/config"
export const useDocument = (c, id) => {
const [document, setDocument] = useState(null)
const [error, setError] = useState(null)
// realtime document data
useEffect(() => {
const ref = doc(db, c, id)
const unsubscribe = onSnapshot(
ref,
(snapshot) => {
// need to make sure the doc exists & has data
if (snapshot.data()) {
setDocument({ ...snapshot.data(), id: snapshot.id })
setError(null)
} else {
setError("No such document exists")
}
},
(err) => {
console.log(err.message)
setError("failed to get document")
}
)
// unsubscribe on unmount
return () => unsubscribe()
}, [c, id])
return { document, error }
}
If you have the slug as a field in the document data then you can use a Query to get that document as shown below:
// Query to fetch documents where slug field is equal to given SLUG
const q = query(collection(db, c), where("slug", "==", SLUG))
onSnapshot(q, snap => {
if (!snap.empty) {
const data = snap.docs[0].data()
// snap.docs would be an array with 1 document
// There could be multiple in case multiple posts have same slug by chance
console.log(data)
} else {
console.log("No documents found with given slug")
}
})
you could do smth like
import { useEffect, useState } from "react"
// firebase import
import { doc, onSnapshot } from "firebase/firestore"
import { db } from "../firebase/config"
const useDocumentHook = (slug) => {
const [doc, setDoc] = useState(null)
useEffect(() => {
const docRef = db.collection("posts").doc(slug)
const unsubscribe = onSnapshot(docRef, (doc) => {
setDoc(doc)
})
return () => unsubscribe()
}, [slug])
return doc
}