Chapter 11 - Update data to Firebase using Laravel PHP

In this chapter, we will learn how to update data to Firebase Cloud Firestore using Laravel PHP package.

Consider the list of Student in Firebase Cloud Firestore. We would update these student data for all different type of datatypes of fields.

Update normal string field name

$student = app('firebase.firestore')->database()->collection('Student')->document(<studentid>);  

Example

$student = app('firebase.firestore')->database()->collection('Student')->document('defT5uT7SDu9K5RFtIdl')  
 ->update([  
  ['path' => 'name', 'value' => 'John Kone']  
 ]);  

After update, firebase will look like this

Before updating or even inserting a value for fields like Integer or float, boolean make sure you convert your request params to specific datatype

$student = app('firebase.firestore')->database()->collection('Student')->document('defT5uT7SDu9K5RFtIdl')  
 ->update([  
  ['path' => 'id', 'value' => intval($request->id)]  
 ]);  
 $student = app('firebase.firestore')->database()->collection('Student')->document('defT5uT7SDu9K5RFtIdl')  
 ->update([  
  ['path' => 'percentage', 'value' => floatval($request->percentage)]  
 ]);  

To insert a element in to array field through update query. It will check for duplicate entries too. Consider we have hobbies of student

Now you have to insert 'Baseball' into 'hobbies' array field, we will use arrayUnion

$student = app('firebase.firestore')->database()->collection('Student')->document('defT5uT7SDu9K5RFtIdl')  
 ->update([  
  ['path' => 'hobbies', 'value' => \Google\Cloud\Firestore\FieldValue::arrayUnion(['Baseball'])]  
 ]);  

Now if you want to remove an element, then we will use arrayRemove

$student = app('firebase.firestore')->database()->collection('Student')->document('defT5uT7SDu9K5RFtIdl')  
 ->update([  
  ['path' => 'hobbies', 'value' => \Google\Cloud\Firestore\FieldValue::arrayRemove(['Music'])]  
 ]);  

Update a timestamp value by following

$student = app('firebase.firestore')->database()->collection('Student')->document('defT5uT7SDu9K5RFtIdl')  
 ->update([  
  ['path' => 'last_updated_at', 'value' => new \Google\Cloud\Core\Timestamp(new \DateTime('2020-04-04 23:03'))]  
 ]);  

To update a reference field. Example a number subject 'English' has been added and you have to update student's favourite_subject to reference of this newly added one.

$subject = app('firebase.firestore')->database()->collection('Subject')->newDocument();  
 $subject->set(['name' =>'English');  
 $student = app('firebase.firestore')->database()->collection('Student')->document('defT5uT7SDu9K5RFtIdl')  
 ->update([  
  ['path' => 'favourite_subject', 'value' => $subject]  
 ]);  

Hope you are now ready to update any datatype fields in the Firebase through your Laravel PHP code. Please let us know, how much you like the chapters of our blog and also write any doubt in comment section below. Thanks for reading.