discourse/app/serializers/topic_list_item_serializer.rb

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class TopicListItemSerializer < ListableTopicSerializer
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attributes :views,
:like_count,
:starred,
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:has_summary,
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:archetype,
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:last_poster_username,
:category_id,
:op_like_count,
:pinned_globally
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has_many :posters, serializer: TopicPosterSerializer, embed: :objects
has_many :participants, serializer: TopicPosterSerializer, embed: :objects
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def starred
object.user_data.starred?
end
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alias :include_starred? :has_user_data
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def posters
object.posters || []
end
def op_like_count
object.first_post && object.first_post.like_count
end
def last_poster_username
posters.find { |poster| poster.user.id == object.last_post_user_id }.try(:user).try(:username)
end
def participants
object.participants_summary || []
end
def include_participants?
object.private_message?
end
def include_op_like_count?
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# PERF: long term we probably want a cheaper way of looking stuff up
# this is rather odd code, but we need to have op_likes loaded somehow
# simplest optimisation is adding a cache column on topic.
object.association(:first_post).loaded?
end
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end