Reactions

Overview

You can react to both activities and comments. It's possible to configure any reaction types that best fit your app.

When adding reactions and the enforce_unique flag is set to true, the existing reaction of a user will be overridden with the new reaction. Use this flag if you want to ensure users have a single reaction per each comment/activity. The default value is false, in which case users can have multiple reactions.

// Add a reaction to an activity
const addResponse = await client.addActivityReaction({
  activity_id: "activity_123",
  type: "like",
  custom: {
    emoji: "❤️",
  },
  // Optionally override existing reaction
  enforce_unique: true,
});

console.log(addResponse.reaction);

// Adding a reaction without triggering push notifications
await client.addActivityReaction({
  activity_id: "activity_123",
  type: "like",
  custom: {
    emoji: "❤️",
  },
  skip_push: true,
});

// Add a reaction to a comment
await client.addCommentReaction({
  id: comment.id,
  type: "like",
  custom: {
    emoji: "👍",
  },
  // Optionally override existing reaction
  enforce_unique: true,
});

// Adding a comment reaction without triggering push notifications
await client.addCommentReaction({
  id: comment.id,
  type: "like",
  custom: {
    emoji: "👍",
  },
  skip_push: true,
});
const deleteResponse = await client.deleteActivityReaction({
  activity_id: activity.id,
  type: "like",
});
console.log(deleteResponse.reaction);

// Add a reaction to an activity
const addResponse = await client.addActivityReaction({
  activity_id: "activity_123",
  type: "like",
  custom: {
    emoji: "❤️",
  },
  // Optionally override existing reaction
  enforce_unique: true,
});

console.log(addResponse.reaction);

// Adding a reaction without triggering push notifications
await client.addActivityReaction({
  activity_id: "activity_123",
  type: "like",
  custom: {
    emoji: "❤️",
  },
  skip_push: true,
});

// Add a reaction to a comment
await client.addCommentReaction({
  id: comment.id,
  type: "like",
  custom: {
    emoji: "👍",
  },
  // Optionally override existing reaction
  enforce_unique: true,
});

// Adding a comment reaction without triggering push notifications
await client.addCommentReaction({
  id: comment.id,
  type: "like",
  custom: {
    emoji: "👍",
  },
  skip_push: true,
});
const deleteResponse = await client.deleteActivityReaction({
  activity_id: activity.id,
  type: "like",
});
console.log(deleteResponse.reaction);

// Add a reaction to an activity
const addResponse = await client.addActivityReaction({
  activity_id: "activity_123",
  type: "like",
  custom: {
    emoji: "❤️",
  },
  // Optionally override existing reaction
  enforce_unique: true,
});

console.log(addResponse.reaction);

// Adding a reaction without triggering push notifications
await client.addActivityReaction({
  activity_id: "activity_123",
  type: "like",
  custom: {
    emoji: "❤️",
  },
  skip_push: true,
});

// Add a reaction to a comment
await client.addCommentReaction({
  id: comment.id,
  type: "like",
  custom: {
    emoji: "👍",
  },
  // Optionally override existing reaction
  enforce_unique: true,
});

// Adding a comment reaction without triggering push notifications
await client.addCommentReaction({
  id: comment.id,
  type: "like",
  custom: {
    emoji: "👍",
  },
  skip_push: true,
});
const deleteResponse = await client.deleteActivityReaction({
  activity_id: activity.id,
  type: "like",
});
console.log(deleteResponse.reaction);

// Add a reaction to an activity
val reaction: Result<FeedsReactionData> = feed.addActivityReaction(
    activityId = "activity_123",
    request = AddReactionRequest(
        custom = mapOf("emoji" to "❤️"),
        type = "like",
        // Optionally override existing reaction
        enforceUnique = true
    )
)

// Remove a reaction
val deleteResult: Result<FeedsReactionData> = feed.deleteActivityReaction(
    activityId = "activity_123",
    type = "like"
)

// Add a reaction to an activity
let reaction = try await feed.addReaction(
    activityId: "activity_123",
    request: .init(
        custom: ["emoji": "❤️"],
        type: "like"
    )
)
// Remove a reaction
_ = try await feed.deleteReaction(activityId: "activity_123", type: "like")

// Add a reaction to an activity
final reaction = await feed.addActivityReaction(
  activityId: 'activity_123',
  request: const AddReactionRequest(
    custom: {'emoji': '❤️'},
    type: 'like',
    // Optionally override existing reaction
    enforceUnique: true,
  ),
);
// Remove a reaction
await feed.deleteActivityReaction(activityId: 'activity_123', type: 'like');

// Add a reaction to an activity
const addResponse = await client.feeds.addActivityReaction({
  activity_id: "activity_123",
  type: "like",
  custom: {
    emoji: "❤️",
  },
  user_id: "reacting_user_id",
  // Optionally override existing reaction
  enforce_unique: true,
});

console.log(addResponse.reaction);

// Adding a reaction without triggering push notifications
await client.feeds.addActivityReaction({
  activity_id: "activity_123",
  type: "like",
  custom: {
    emoji: "❤️",
  },
  user_id: "reacting_user_id",
  skip_push: true,
});

// Add a reaction to a comment
await client.feeds.addCommentReaction({
  comment_id: "comment_456",
  type: "like",
  custom: {
    emoji: "👍",
  },
  user_id: "reacting_user_id",
  // Optionally override existing reaction
  enforce_unique: true,
});

// Adding a comment reaction without triggering push notifications
await client.feeds.addCommentReaction({
  comment_id: "comment_456",
  type: "like",
  custom: {
    emoji: "👍",
  },
  user_id: "reacting_user_id",
  skip_push: true,
});

const deleteResponse = await client.feeds.deleteActivityReaction({
  activity_id: "activity_123",
  type: "like",
  user_id: "reacting_user_id",
});

console.log(deleteResponse.reaction);

# Add a reaction to an activity
reaction_request = GetStream::Generated::Models::AddReactionRequest.new(
  type: 'like',
  user_id: 'user123',
  custom: {
    emoji: '❤️'
  }
)

response = client.feeds.add_reaction(activity_id, reaction_request)

# Adding a reaction without triggering push notifications
reaction_request_skip_push = GetStream::Generated::Models::AddReactionRequest.new(
  type: 'like',
  user_id: 'user123',
  custom: {
    emoji: '❤️'
  },
  skip_push: true
)

response = client.feeds.add_reaction(activity_id, reaction_request_skip_push)

# Add a reaction to a comment
comment_reaction_request = GetStream::Generated::Models::AddCommentReactionRequest.new(
  type: 'like',
  user_id: 'user123',
  custom: {
    emoji: '👍'
  }
)

response = client.feeds.add_comment_reaction(comment_id, comment_reaction_request)

# Delete activity reaction
response = client.feeds.delete_activity_reaction(activity_id, 'like', 'user123')

// Add a reaction to an activity
$response = $feedsClient->addActivityReaction(
    "activity_123",
    new GeneratedModels\AddReactionRequest(
        type: 'like',
        userID: 'user123',
        // Optionally override existing reaction
        enforceUnique: true,
        custom: (object)['emoji' => '❤️']
    )
);

// Adding a reaction without triggering push notifications
$response = $feedsClient->addActivityReaction(
    "activity_123",
    new GeneratedModels\AddReactionRequest(
        type: 'like',
        userID: 'user123',
        custom: (object)['emoji' => '❤️'],
        skipPush: true
    )
);

// Add a reaction to a comment
$response = $feedsClient->addCommentReaction(
    "comment_456",
    new GeneratedModels\AddCommentReactionRequest(
        type: 'like',
        userID: 'user123',
        // Optionally override existing reaction
        enforceUnique: true,
        custom: (object)['emoji' => '👍']
    )
);

// Adding a comment reaction without triggering push notifications
$response = $feedsClient->addCommentReaction(
    "comment_456",
    new GeneratedModels\AddCommentReactionRequest(
        type: 'like',
        userID: 'user123',
        custom: (object)['emoji' => '👍'],
        skipPush: true
    )
);

// Delete activity reaction
$response = $feedsClient->deleteActivityReaction(
    "activity_123",
    "like",
    "user123"
);

// Add a reaction to an activity
_, err = client.Feeds().AddReaction(context.Background(), activityID, &getstream.AddReactionRequest{
  Type:       "like",
  Custom: map[string]any{
    "emoji": "❤️",
  },
  UserID: getstream.PtrTo("john"),
})
if err != nil {
  log.Fatal("Error adding reaction:", err)
}

// Adding a reaction without triggering push notifications
_, err = client.Feeds().AddReaction(context.Background(), activityID, &getstream.AddReactionRequest{
  Type:       "like",
  Custom: map[string]any{
    "emoji": "❤️",
  },
  UserID:   getstream.PtrTo("john"),
  SkipPush: getstream.PtrTo(true),
})
if err != nil {
  log.Fatal("Error adding reaction without push:", err)
}

// Add a reaction to a comment
_, err = client.Feeds().AddCommentReaction(context.Background(), commentID, &getstream.AddCommentReactionRequest{
  Type:      "like",
  Custom: map[string]any{
    "emoji": "👍",
  },
  UserID: getstream.PtrTo("john"),
})
if err != nil {
  log.Fatal("Error adding comment reaction:", err)
}

// Adding a comment reaction without triggering push notifications
_, err = client.Feeds().AddCommentReaction(context.Background(), commentID, &getstream.AddCommentReactionRequest{
  Type:      "like",
  Custom: map[string]any{
    "emoji": "👍",
  },
  UserID:   getstream.PtrTo("john"),
  SkipPush: getstream.PtrTo(true),
})
if err != nil {
  log.Fatal("Error adding comment reaction without push:", err)
}

// Delete activity reaction
_, err = client.Feeds().DeleteActivityReaction(context.Background(), activityID, "like", &getstream.DeleteActivityReactionRequest{
  UserID:     getstream.PtrTo("john"),
})
if err != nil {
  log.Fatal("Error deleting activity reaction:", err)
}

AddReactionRequest reactionRequest =
    AddReactionRequest.builder().type("like").userID(testUserId).build();

AddReactionResponse response =
    feeds.addReaction(activityId, reactionRequest).execute().getData();

Overview of the reaction model

FeedsReactionResponse

Name	Type	Description	Constraints
`activity_id`	`string`	ID of the activity that was reacted to	Required
`comment_id`	`string`	ID of the comment that was reacted to	-
`created_at`	`number`	When the reaction was created	Required
`custom`	`object`	Custom data for the reaction	-
`type`	`string`	Type of reaction	Required
`updated_at`	`number`	When the reaction was last updated	Required
`user`	`UserResponse`	User who created the reaction	Required

By default creating a reaction doesn't create an activity. Pass create_notification_activity: true to add a notification to the reacted-to user's notification feed — see Reaction notification creation timing (added June 23, 2026). The response includes notification_accepted and notification_task_id; notification_created is deprecated and mirrors notification_accepted.

When you read a feed the reactions are included. Here's an example:

const feed = client.feed("user", "sara");
await feed.getOrCreate();

console.log(feed.state.getLatestValue().activities?.[0].own_reactions);
console.log(feed.state.getLatestValue().activities?.[0].latest_reactions);
console.log(feed.state.getLatestValue().activities?.[0].reaction_groups);

const feed = client.feed("user", "sara");
await feed.getOrCreate();

console.log(feed.state.getLatestValue().activities?.[0].own_reactions);
console.log(feed.state.getLatestValue().activities?.[0].latest_reactions);
console.log(feed.state.getLatestValue().activities?.[0].reaction_groups);

const feed = client.feed("user", "sara");
await feed.getOrCreate();

console.log(feed.state.getLatestValue().activities?.[0].own_reactions);
console.log(feed.state.getLatestValue().activities?.[0].latest_reactions);
console.log(feed.state.getLatestValue().activities?.[0].reaction_groups);

feed.getOrCreate()
feed.state.activities.collect { activities ->
    // Last 15 reactions on the first activity
    println(activities.first().latestReactions)
    // Count of reactions by type
    println(activities.first().reactionGroups)
}

let feedData = try await feed.getOrCreate()
// Last 15 reactions on the first activity
print(feed.state.activities[0].latestReactions)
// Count of reactions by type
print(feed.state.activities[0].reactionGroups)

final feedData = await feed.getOrCreate();
// Last 15 reactions on the first activity
print(feed.state.activities[0].latestReactions);
// Count of reactions by type
print(feed.state.activities[0].reactionGroups);

const feed = client.feeds.feed("user", "sara");
const response = await feed.getOrCreate({ user_id: "sara" });

console.log(response.activities[0].own_reactions);
console.log(response.activities[0].latest_reactions);
console.log(response.activities[0].reaction_groups);

# Query reactions to a specific activity
# First page
first_page = client.feeds.query_activity_reactions(
  activity_id,
  GetStream::Generated::Models::QueryActivityReactionsRequest.new(
    limit: 10,
    filter: {
      reaction_type: 'like'
    }
  )
)

# Second page using next cursor from first page
if first_page.next
  second_page = client.feeds.query_activity_reactions(
    activity_id,
    GetStream::Generated::Models::QueryActivityReactionsRequest.new(
      limit: 10,
      filter: {
        reaction_type: 'like'
      },
      next: first_page.next
    )
  )
end

# Access reaction data
puts first_page.reactions
puts first_page.reaction_groups

// Get feed data with reactions
$feedResponse = $feedsClient->getOrCreateFeed(
    "user",
    "sara",
    new GeneratedModels\GetOrCreateFeedRequest(
        userID: "sara"
    )
);

// Access reaction data from activities
$activities = $feedResponse->getData()->activities;
if (!empty($activities)) {
    $firstActivity = $activities[0];
    echo "Own reactions: " . json_encode($firstActivity->ownReactions ?? []) . "\n";
    echo "Latest reactions: " . json_encode($firstActivity->latestReactions ?? []) . "\n";
    echo "Reaction groups: " . json_encode($firstActivity->reactionGroups ?? []) . "\n";
}

// Query reactions to a specific activity
$response = $feedsClient->queryActivityReactions(
    "activity_123",
    new GeneratedModels\QueryActivityReactionsRequest(
        limit: 10,
        filter: (object)['reaction_type' => 'like']
    )
);

feed := client.Feeds().Feed("user", "john")
feedResponse, err := feed.GetOrCreate(context.Background(), &getstream.GetOrCreateFeedRequest{
  UserID:          getstream.PtrTo("john"),
})

fmt.Println(feedResponse.Data.Activities[0].OwnReactions)
fmt.Println(feedResponse.Data.Activities[0].LatestReactions)
fmt.Println(feedResponse.Data.Activities[0].ReactionGroups)

var response = await _feedsV3Client.QueryActivityReactionsAsync(
    activityId,
    new QueryActivityReactionsRequest
    {
        Limit = 10,
        Filter = new Dictionary<string, object> { ["reaction_type"] = "like" }
    }
);

Map<String, Object> filter = new HashMap<>();
filter.put("reaction_type", "like");

QueryActivityReactionsRequest queryRequest =
    QueryActivityReactionsRequest.builder().limit(10).filter(filter).build();

QueryActivityReactionsResponse response =
    feeds.queryActivityReactions(activityId, queryRequest).execute().getData();

Querying Reactions

You can query reactions to both activities and comments. Here are some examples:

await client.queryActivityReactions({
  activity_id: activity.id,
  // Provide optional filters
  filter: {
    reaction_type: "like",
  },
});

await client.queryCommentReactions({
  id: comment.id,
  // Provide optional filters

  filter: {
    reaction_type: "like",
  },
});

await client.queryActivityReactions({
  activity_id: activity.id,
  // Provide optional filters
  filter: {
    reaction_type: "like",
  },
});

await client.queryCommentReactions({
  id: comment.id,
  // Provide optional filters

  filter: {
    reaction_type: "like",
  },
});

await client.queryActivityReactions({
  activity_id: activity.id,
  // Provide optional filters
  filter: {
    reaction_type: "like",
  },
});

await client.queryCommentReactions({
  id: comment.id,
  // Provide optional filters

  filter: {
    reaction_type: "like",
  },
});

// Query reactions to a specific activity
val activityReactionList = client.activityReactionList(
    ActivityReactionsQuery(
        activityId = "activity-123",
        filter = ActivityReactionsFilterField.reactionType.equal("like"),
    )
)
activityReactionList.get()
activityReactionList.state.reactions.collect { reactions ->
    // Handle activity reactions
}

// Query reactions to a specific comment
val commentReactionList = client.commentReactionList(
    CommentReactionsQuery(
        commentId = "comment-456",
        filter = CommentReactionsFilterField.reactionType.equal("like"),
    )
)
commentReactionList.get()
commentReactionList.state.reactions.collect { reactions ->
    // Handle comment reactions
}

await client.feeds.queryActivityReactions({
  activity_id: activity.id,
  // Provide optional filters
  filter: {
    reaction_type: "like",
  },
});

await client.feeds.queryCommentReactions({
  id: comment.id,
  // Provide optional filters

  filter: {
    reaction_type: "like",
  },
});

// Query reactions to a specific activity
$response = $feedsClient->queryActivityReactions(
    "activity_123",
    new GeneratedModels\QueryActivityReactionsRequest(
        limit: 10,
        filter: (object)['reaction_type' => 'like']
    )
);

// Handle activity reactions
$reactions = $response->getData()->reactions;
foreach ($reactions as $reaction) {
    echo "Reaction: " . $reaction->type . " by " . $reaction->user->id . "\n";
}

// Query reactions to a specific comment
$response = $feedsClient->queryCommentReactions(
    $commentId,
    new GeneratedModels\QueryCommentReactionsRequest(
        limit: 10,
        filter: (object)['reaction_type' => 'like']
    )
);

// Handle comment reactions
$reactions = $response->getData()->reactions;
foreach ($reactions as $reaction) {
    echo "Comment reaction: " . $reaction->type . " by " . $reaction->user->id . "\n";
}

Batch query activity reactions

batchQueryActivityReactions fetches a single user's reactions across a whole page of activities in one call, so you can merge own_reactions back onto a cached page without calling query reactions once per activity. Pass up to 100 activity IDs per request. The response contains reaction rows only (no activity payloads) and supports the same filter, sort, and pagination options as the single-activity query.

On a client-side connection the returned reactions are always the connected user's. Server-side, pass user_id to choose whose reactions to fetch.

const response = await client.batchQueryActivityReactions({
  activity_ids: activities.map((activity) => activity.id),
  filter: { reaction_type: "like" },
});

console.log(response.reactions);

// Fetch the connected user's reactions across a page of activities in one request.
const response = await client.batchQueryActivityReactions({
  activity_ids: activities.map((activity) => activity.id),
  // Optional: filter by reaction type, sort, or paginate with next/prev
  filter: { reaction_type: "like" },
});

// Merge response.reactions back onto the activities as own_reactions
console.log(response.reactions);

// Server-side: pass user_id to choose whose reactions to fetch.
const response = await client.feeds.batchQueryActivityReactions({
  activity_ids: activities.map((activity) => activity.id),
  user_id: "sara",
  filter: { reaction_type: "like" },
});

console.log(response.reactions);

Reaction queryable built-in fields

Both batchQueryActivityReactions and batchQueryCommentReactions accept these filter fields.

name	type	description	supported operations	example
`reaction_type`	string or list of strings	The type of reaction	`$in`, `$eq`	`{ reaction_type: { $in: [ 'like', 'heart', 'thumbs_up' ] } }`
`user_id`	string or list of strings	The ID of the user who created the reaction	`$in`, `$eq`	`{ user_id: { $eq: 'user_123' } }`
`created_at`	string, must be formatted as an RFC3339 timestamp	The time the reaction was created	`$eq`, `$gt`, `$gte`, `$lt`, `$lte`	`{ created_at: { $gte: '2023-12-04T09:30:20.45Z' } }`

Batch query comment reactions

batchQueryCommentReactions is the comment counterpart of batch query activity reactions. It fetches a single user's reactions across up to 100 comments in one call, returning reaction rows only (no comment payloads). Use it to hydrate own_reactions for a whole comment thread without a request per comment. It accepts the same filter fields, sort, and pagination options.

As with activities, a client-side connection returns the connected user's reactions; server-side, pass user_id.

const response = await client.batchQueryCommentReactions({
  comment_ids: comments.map((comment) => comment.id),
  filter: { reaction_type: "like" },
});

console.log(response.reactions);

// Server-side: pass user_id to choose whose reactions to fetch.
const response = await client.feeds.batchQueryCommentReactions({
  comment_ids: comments.map((comment) => comment.id),
  user_id: "sara",
  filter: { reaction_type: "like" },
});

console.log(response.reactions);

Activity Metrics

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