Sorting orders using Firebase

Question

Sorting orders using Firebase

Currently, I am developing an Ionic project and facing an issue with displaying firebase documents on the screen. My goal is to order these documents by date, which is a field of type date in each document within my collection:

Below is the code snippet that I have implemented to fetch firebase documents for my application.

constructor(private aF: AngularFirestore, private aS: AuthServiceService) {
    this.aF.collection('orders', ref => ref.where('location', '==', 'Store Name Example')).valueChanges().subscribe( data => {
      this.userOrders = data;
    });

  }

I would greatly appreciate any assistance!

typescript firebase ionic-framework google-cloud-firestore

Answer 1

Answer №1

For detailed guidance on ordering and limiting data in Firestore, please refer to the documentation here: https://firebase.google.com/docs/firestore/query-data/order-limit-data

constructor(private aF: AngularFirestore, private aS: AuthServiceService) {
    this.aF.collection('orders', ref => ref.where('location', '==', 'Store Name Example').orderBy('date'))
        .valueChanges()
        .subscribe( data => {
            this.userOrders = data;
        }
    );
}

To properly order dates in Firestore, it is necessary to store them as Timestamp type. More information on Firebase timestamps can be found at: https://firebase.google.com/docs/reference/js/firebase.firestore.Timestamp

If dates are stored as unorderable strings, they cannot be ordered. Dates can be ordered if stored in formats like yyyymmdd or doubles.

If facing issues with ordering dates, consider fetching and resaving the data using the Timestamp data type.

Answer 2

For detailed guidance on ordering and limiting data in Firestore, please refer to the documentation here: https://firebase.google.com/docs/firestore/query-data/order-limit-data

constructor(private aF: AngularFirestore, private aS: AuthServiceService) {
    this.aF.collection('orders', ref => ref.where('location', '==', 'Store Name Example').orderBy('date'))
        .valueChanges()
        .subscribe( data => {
            this.userOrders = data;
        }
    );
}

To properly order dates in Firestore, it is necessary to store them as Timestamp type. More information on Firebase timestamps can be found at: https://firebase.google.com/docs/reference/js/firebase.firestore.Timestamp

If dates are stored as unorderable strings, they cannot be ordered. Dates can be ordered if stored in formats like yyyymmdd or doubles.

If facing issues with ordering dates, consider fetching and resaving the data using the Timestamp data type.

Sorting orders using Firebase

Answer №1

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