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Firestore indexes
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@juanwmedia
juanwmedia committed Oct 14, 2020
1 parent d63ce9b commit 8625e2d
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152 changes: 152 additions & 0 deletions lessons/firestore.md
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@@ -0,0 +1,152 @@
## Set elements

```javascript
const user = { name: "Juan Andr茅s", city: "Valencia", country: "Spain" };
await db
.collection("users")
.doc("juanwmedia")
.set(user, { merge: true });
```

## Add elements

```javascript
await db.collection("users").add(user);
//Get new ID and then add
const newDocRef = db.collection("users").doc();
const newId = newDocRef.id;
await newDocRef.set({ name: "Guizmo", created: Date.now(), id: newId });
```

## Update part of a document

```javascript
const uniqueId = "9ZLdjKqNPBPwQMrpRd60";
await db
.collection("users")
.doc(uniqueId)
.update({ name: "Super Guizmo", specie: "black cat" });
```

## Deleting a document

```javascript
await db;
.collection("users")
.doc(uniqueId)
.delete();
```

## Read a document

```javascript
const document = await db;
.collection("users")
.doc("juanwmedia")
.get();
console.log(document.data());
console.log(document.id); // Document ID
console.log(document.exists); // Document exists (or not)
```

## Read all documents from a collection

```javascript
const collection = await db.collection("users").get();
collection.forEach((doc) => console.log(doc.id, doc.data()));
```

## Read a document from a subcollection

```javascript
const subDocument = await db;
.collection("users")
.doc("juanwmedia")
.collection("meta")
.doc("books")
.get();
const subDocument = await db.doc("users/juanwmedia/meta/books").get();
console.log(subDocument.data());
```

## Listen for changes

```javascript
db.collection("users");
.doc("juanwmedia")
.onSnapshot(docSnapshot => console.log(docSnapshot.data()));
```

## Listen for query changes

```javascript
db.collection("users")
.where("name", "==", "Guizmo")
.onSnapshot((querySnapshot) =>
querySnapshot.forEach((docSnapshot) => console.log(docSnapshot.id))
);
```

## Listen for query type changes

```javascript
const unsub = db
.collection("users")
.where("name", "==", "Guizmo")
.onSnapshot((querySnapshot) =>
querySnapshot.docChanges().forEach((change) => {
if (change.type === "added") {
console.log("Added : ", change.doc.data());
}

if (change.type === "modified") {
console.log("Modified : ", change.doc.data());
}

if (change.type === "removed") {
console.log("Removed : ", change.doc.data());
}
})
);

unsub();
```

## Query documents and collections

```javascript
const collectionRef = db.collection("users");

const query = await collectionRef.where("name", "==", "Guizmo").get();
query.forEach((querySnapshot) => console.log(querySnapshot.data().id));

const query = await collectionRef.where("created", "!=", false).get();
query.forEach((querySnapshot) => console.log(querySnapshot.data()));

const query = await collectionRef
.where("name", "in", ["Guizmo", "Juan Andr茅s"])
.get();
query.forEach((querySnapshot) => console.log(querySnapshot.data()));

const query = await collectionRef
.where("favs", "array-contains-any", ["dusk", "rain"])
.get();
query.forEach((querySnapshot) => console.log(querySnapshot.id));

const query = await collectionRef
.where("name", "==", "Guizmo")
.limit(3)
.get();
query.forEach((querySnapshot) => console.log(querySnapshot.data()));

const query = await collectionRef.orderBy("name", "desc").get();
query.forEach((querySnapshot) => console.log(querySnapshot.data().name));

const query = await collectionRef
.where("created", "<", Date.now())
.orderBy("created", "desc")
.limit(1)
.get();

query.forEach((querySnapshot) => console.log(querySnapshot.data()));
```
108 changes: 2 additions & 106 deletions src/views/RoomsView.vue
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Expand Up @@ -7,118 +7,14 @@ import { db } from "../firebase";
export default {
name: "RoomsView",
async created() {
// Set
// const user = { name: "Juan Andr茅s", city: "Valencia", country: "Spain" };
// await db
// .collection("users")
// .doc("juanwmedia")
// .set(user, { merge: true });
// Add
//await db.collection("users").add(user);
// Get new ID and then add
//const newDocRef = db.collection("users").doc();
//const newId = newDocRef.id;
//await newDocRef.set({ name: "Guizmo", created: Date.now(), id: newId });
// Update part of a document
// const uniqueId = "9ZLdjKqNPBPwQMrpRd60";
// await db
// .collection("users")
// .doc(uniqueId)
// .update({ name: "Super Guizmo", specie: "black cat" });
// Deleting a document
// await db
// .collection("users")
// .doc(uniqueId)
// .delete();
// Read a document
// const document = await db
// .collection("users")
// .doc("juanwmedia")
// .get();
// console.log(document.data());
// console.log(document.id); // Document ID
// console.log(document.exists); // Document exists (or not)
// Read all documents from a collection
// const collection = await db.collection("users").get();
// collection.forEach(doc => console.log(doc.id, doc.data()));
// Read a document from a subcollection
// const subDocument = await db
// .collection("users")
// .doc("juanwmedia")
// .collection("meta")
// .doc("books")
// .get();
// const subDocument = await db.doc("users/juanwmedia/meta/books").get();
// console.log(subDocument.data());
// Listen for changes
// db.collection("users")
// .doc("juanwmedia")
// .onSnapshot(docSnapshot => console.log(docSnapshot.data()));
// Listen for query changes
// db.collection("users")
// .where("name", "==", "Guizmo")
// .onSnapshot(querySnapshot =>
// querySnapshot.forEach(docSnapshot => console.log(docSnapshot.id))
// );
// Listen for query type changes
// const unsub = db
// .collection("users")
// .where("name", "==", "Guizmo")
// .onSnapshot(querySnapshot =>
// querySnapshot.docChanges().forEach(change => {
// if (change.type === "added") {
// console.log("Added : ", change.doc.data());
// }
// if (change.type === "modified") {
// console.log("Modified : ", change.doc.data());
// }
// if (change.type === "removed") {
// console.log("Removed : ", change.doc.data());
// }
// })
// );
// unsub();
// Query documents and collections
const collectionRef = db.collection("users");
// const query = await collectionRef.where("name", "==", "Guizmo").get();
// query.forEach(querySnapshot => console.log(querySnapshot.data().id));
// const query = await collectionRef.where("created", "!=", false).get();
// query.forEach(querySnapshot => console.log(querySnapshot.data()));
// const query = await collectionRef
// .where("name", "in", ["Guizmo", "Juan Andr茅s"])
// .get();
// query.forEach(querySnapshot => console.log(querySnapshot.data()));
// const query = await collectionRef
// .where("favs", "array-contains-any", ["dusk", "rain"])
// .get();
// query.forEach(querySnapshot => console.log(querySnapshot.id));
// const query = await collectionRef
// .where("name", "==", "Guizmo")
// .limit(3)
// .get();
// query.forEach(querySnapshot => console.log(querySnapshot.data()));
// const query = await collectionRef.orderBy("name", "desc").get();
// query.forEach(querySnapshot => console.log(querySnapshot.data().name));
const query = await collectionRef
.where("created", "<", Date.now())
.orderBy("created", "desc")
.limit(1)
.where("name", "==", "Guizmo")
.orderBy("created", "asc")
.get();
//console.log(query);
query.forEach(querySnapshot => console.log(querySnapshot.data()));
}
};
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