Add extra data to a message

You can add extra data, such as metadata and sorted_metaarray, to a message in an open or group channel. By storing one or more key-value items to a message, you can use the data to implement various actions in a channel. Based on the items, you can measure user engagement in conversations or count how many times a message has been copied by users in the channel. As shown in the code below, you can add, update, or delete these key-value items anytime. To retrieve the key-values items of a message, call message.metaArrays.

Note: To learn more about the different options for storing additional information about a user, channel, or message, go to the overview page under Channel.

// When a message has been successfully sent to a channel, create items with keys.
const keys: string[] = ['referees', 'games'];
await channel.createMessageMetaArrayKeys(MESSAGE, keys);

// Add values to items by their keys.
const valuesToAdd: MessageMetaArray[] = [{
    'referees': ['John', 'Brandon', 'Harry', 'Jay'],
    'games': ['soccer', 'baseball', 'basketball']
}];
await channel.addMessageMetaArrayValues(MESSAGE, valuesToAdd);

// Remove existing values of items by their keys.
const valuesToRemove: MessageMetaArray[] = [{
    'referees': ['Brandon', 'Jay']
}];
await channel.removeMessageMetaArrayValues(MESSAGE, valuesToRemove);

// Delete items by their keys.
const keys: string[] = ['referees', 'games'];
await channel.deleteMessageMetaArrayKeys(MESSAGE, keys);

Note: Every Sendbird application has a different limit on how many key-value items you can add to a single message, as well as the maximum number of values an item can have. If you wish to learn more about these limits, contact our sales team.