Adding multiple objects to Firebase Database with one call

[Bahadır Yerdelen]

Hi,

I am trying to make a chat structure.

-I have a database branch of contacts of user and when I send a message, it adds the messaged user with the value of timestamp to "Contacts" if it is not existing, otherwise updates the timestamp.

-Also I have the messages bransh of the database which saves the sent message under the "Messages" with sent person name and timestamp.

-If I am using setvalueasync method(I am using Unity sdk, it is set value method in other sdk's), I save contacts, message-from-timestamp correctly but then I am sending 4 setvalueasync at once which is inconvenient because this is an operation as a whole and also it is too many calls at once.

-If I am using updatechildren method as a batch, then I can save all but it replaces them and not adding new. Update children does not have Push method to create one.

Below is the code I am using with update children method :

        DatabaseReference reference = FirebaseDatabase.DefaultInstance.RootReference;

        Dictionary<string, System.Object> update = new Dictionary<string, System.Object>();

        update["/Contacts/" + users[user].name.text] = new Dictionary<string, System.Object>()

        {

            {

                users[(user + 1) % 2].name.text, ServerValue.Timestamp

            }

        };

        update["/Messages/" + (users[0].name.text + "" + users[1].name.text) + "/Message"  ] = new Dictionary<string, System.Object>()

        {

            {

                "From", users[user].name.text

            }

        };

        update["/Messages/" + (users[0].name.text + "" + users[1].name.text) + "/Message"  ] = new Dictionary<string, System.Object>()

        {

            {

                "Message", users[user].message.text

            }

        };

        update["/Messages/" + (users[0].name.text + "" + users[1].name.text) + "/Message"  ] = new Dictionary<string, System.Object>()

        {

            {

                "Time", ServerValue.Timestamp

            }

        };

        reference.UpdateChildrenAsync(update).ContinueWith(task =>

        {

            if (task.Exception != null)

                Debug.Log(task.Exception.ToString());

            else if (task.IsCompleted)

                Debug.Log("Message Sent");

        });;

Is there any way to use batch messaging but also use push to create new one instead of replacing the whole children?

Thanks

 

[Kato Richardson]

Hello Bahadir,

You can create a push id without actually going and saving a record, and then use that as the key in your dictionary entries. It looks like there’s an example of this under update specific fields, where it calls https://firebase.google.com/docs/database/unity/save-data#update_specific_fields.

I hope that helps!

☼, Kato

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Kato Richardson |

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kato...@google.com |

775-235-8398

[Kato Richardson]

Oops, looks like something went wrong with the markup in that email. In case it's broken for you too, the example looks like this: string key = mDatabase.Child("scores").Push().Key;

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