#PAGICO ANDROID CREATE COLLECTION HOW TO#
#PAGICO ANDROID CREATE COLLECTION CODE#
#PAGICO ANDROID CREATE COLLECTION DOWNLOAD#

With the older Firebase Realtime Database, I had to download arrays and then iterate through the arrays with forEach to get the element I wanted. I use collections when I need to access individual elements, a.k.a. The user can ask, 'How do I spell 'of'?' The user isn't going to ask, 'What's the second letter in 'of'?' For example, an array of the letters of the word 'of' would be. IMHO, I use arrays in Firestore when the entire array is uploaded and downloaded together, i.e., I don't need to access individual elements. Promise.all tells us when all three subcollections are set. then, and then we create the three subcollections.

#PAGICO ANDROID CREATE COLLECTION CODE#

The first line of the code creates the collection EnglishWords.

The Spanish document has three key-value pairs, telling you that 'de' is the Spanish translation of 'of'. The subcollection Translations has one document: Spanish. The document of has three subcollections: AudioSources (recordings of the word in American and British accents), FunFacts, and Translations.

This makes a collection EnglishWords, which has a document of. Promises.push(firebase.firestore().collection($scope.longLanguage + 'Words').doc($scope.word).collection('Translations').doc($anslationLongLanguage).set(translationObject)) Ĭonsole.log('All subcollections were added!') Ĭonsole.log('Error adding subcollections to Firestore: ' + error) Ĭonsole.log('Error adding document to Firestore: ' + error) Promises.push(firebase.firestore().collection($scope.longLanguage + 'Words').doc($scope.word).collection('FunFacts').doc($scope.longLanguage).set(funFactObject)) Promises.push(firebase.firestore().collection($scope.longLanguage + 'Words').doc($scope.word).collection('AudioSources').doc($scope.accentDialect).set(accentDialectObject)) Here's my code: firebase.firestore().collection($scope.longLanguage + 'Words').doc($scope.word).set(wordData)Ĭonsole.log('Collection added to Firestore!')

#PAGICO ANDROID CREATE COLLECTION HOW TO#

The picture above does not show how to retrieve data, it shows a database structure in which you have something like this: collection -> document -> subCollection -> document It will be considered one write operation for every message, in total 1000 operations. You also cannot create a subcollection with 1000 messages, add all of them to the database, and expect it to be considered a single record. Here is the documentation where it is very well explained. However, you can still model this kind of data by leveraging the other capabilities of the Cloud Firestore. One of the many reasons Firebase recommends against using arrays is that it makes the security rules impossible to write.Ĭloud Firestore can store arrays, but it does not support querying array members or updating single array elements. In Firebase Realtime database you could also use an array, but this is an anti-pattern. But regarding Supported Data Types in Firestore, in fact, you can use an array because it is supported. You can switch to Firebase Realtime Database if you want where the number of writes doesn't matter. collection('messages').document('message1') Ĭreating a messages collection and calling addDocument() 1000 times will be expensive for sure, but this is how Firestore works. To write a subCollection in a document, please use the following code: DocumentReference messageRef = db If the array has multiple instances of the value you query on, the document is included in the results only once.Īssuming we have a chat application that has a database structure that looks similar to this: This query returns every city document where the regions field is an array that contains west_coast. A simple example would be: CollectionReference citiesRef = db.collection('cities') ĬitiesRef.whereArra圜ontains('regions', 'west_coast') According to the updated documentation regarding array membership, now it is possible to filter data based on array values using whereArra圜ontains() method.

Pagico android create collection