Firestore Admin Cheat Sheet

await db.collection("users").doc("DwightSchrute").set({ role: "Assistant to the Regional Manager" });

// merges does not overwrite
await db.collection("users").doc("DwightSchrute").set({ atOffice: true }, { merge: true });

await db.collection("users").add({ name: "Npc" });

await db.collection("users").doc("DwightSchrute").collection("problems").add({name: "Jim"});

const docSnap = await db.collection("users").doc("DwightSchrute").get();
 
console.log(docSnap.data())

 
const unsub = db.collection("users").doc("DwightSchrute").onSnapshot(
  (docSnap) => {
    console.log(docSnap.data())
  },
  (err) => {
    console.log(err);
  }
);
 
// Stop listening to changes
unsub()

const querySnap = await db.collection("users").get();
querySnap.forEach((docSnap) => {
  console.log({...docSnap.data(), id: docSnap.id});
});

  const querySnap = await db.collection("users").doc("DwightSchrute").collection("problems").get();
 
  querySnap.forEach((docSnap) => {
    console.log(docSnap.data());
  });

const querySnap = await db.collectionGroup('problems').get(); // get all subcollections with the name problems across all users
 
querySnap.forEach((docSnap) => {
  console.log(docSnap.data());
});

const querySnap = await db.collection("users")
  .where("atOffice", "==", true)
  .where("role", "==", "Assistant to the Regional Manager")
  .get();
 
querySnap.forEach((docSnap) => {
  console.log(docSnap.data());
});

.where("population", ">", 1000000),
.where("regions", "array-contains", "west_coast"),
.where("regions", "array-contains-any", ["west_coast", "east_coast"]); // returns every city document where the regions field is an array that contains west_coast or east_coast
.where("country", "in", ["USA", "Japan"]); //eturns every city document where the country field is set to USA or Japan
.orderBy("name", "desc"); // orders responses
.limit(3); // limits reponses
.where(
    Filter.or(
      Filter.where('capital', '==', true),
      Filter.where('population', '>=', 1000000)
    )
  )

< less than
<= less than or equal to
== equal to
 
> greater than
>= greater than or equal to
!= not equal to
 
array-contains
array-contains-any
in
not-in

await db.collection("users").doc("DwightSchrute").update({ atOffice: false });

await db.collection("users").doc("DwightSchrute").update({
  "favorites.song": "Kickstart My Heart",
});

import { FieldValue } from "firebase-admin/firestore"
 
await db.collection("users").doc("DwightSchrute").update({
  friends: FieldValue.arrayRemove("Kevin"),
  enemies: FieldValue.arrayUnion("Jim"),
});

import { FieldValue } from "firebase-admin/firestore"
 
await db.collection("users").doc("DwightSchrute").update({
  friends: FieldValue.delete(),
});

await db.collection("users").doc("DwightSchrute").delete();

await db.recursiveDelete(db.collection("users").doc("DwightSchrute"));

await db.recursiveDelete(db.collection("users"));