Class: Reviewable

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
app/models/reviewable.rb,
lib/reviewable/actions.rb,
lib/reviewable/collection.rb,
lib/reviewable/conversation.rb,
lib/reviewable/perform_result.rb,
lib/reviewable/editable_fields.rb

Defined Under Namespace

Classes: Actions, Collection, Conversation, EditableFields, InvalidAction, PerformResult, UpdateConflict

Constant Summary collapse

TYPE_TO_BASIC_SERIALIZER = 
{
  ReviewableFlaggedPost: BasicReviewableFlaggedPostSerializer,
  ReviewableQueuedPost: BasicReviewableQueuedPostSerializer,
  ReviewableUser: BasicReviewableUserSerializer,
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#created_new ⇒ Object

Returns the value of attribute created_new.



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# File 'app/models/reviewable.rb', line 21

def created_new
  @created_new
end

Class Method Details

.action_aliases ⇒ Object

Can be used if several actions are equivalent



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# File 'app/models/reviewable.rb', line 50

def self.action_aliases
  {}
end

.add_custom_filter(new_filter) ⇒ Object 



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# File 'app/models/reviewable.rb', line 79

def self.add_custom_filter(new_filter)
  custom_filters << new_filter
end

.basic_serializers_for_list(reviewables, user) ⇒ Object 



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# File 'app/models/reviewable.rb', line 538

def self.basic_serializers_for_list(reviewables, user)
  reviewables.map { |r| r.basic_serializer.new(r, scope: user.guardian, root: nil) }
end

.bulk_perform_targets(performed_by, action, type, target_ids, args = nil) ⇒ Object 



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# File 'app/models/reviewable.rb', line 378

def self.bulk_perform_targets(performed_by, action, type, target_ids, args = nil)
  args ||= {}
  viewable_by(performed_by)
    .where(type: type, target_id: target_ids)
    .each { |r| r.perform(performed_by, action, args) }
end

.clear_custom_filters! ⇒ Object 



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# File 'app/models/reviewable.rb', line 83

def self.clear_custom_filters!
  @reviewable_filters = []
end

.count_by_date(start_date, end_date, category_id = nil, include_subcategories = false) ⇒ Object 



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# File 'app/models/reviewable.rb', line 573

def self.count_by_date(start_date, end_date, category_id = nil, include_subcategories = false)
  query =
    scores_with_topics.where("reviewable_scores.created_at BETWEEN ? AND ?", start_date, end_date)

  if category_id
    if include_subcategories
      query = query.where("topics.category_id IN (?)", Category.subcategory_ids(category_id))
    else
      query = query.where("topics.category_id = ?", category_id)
    end
  end

  query
    .group("date(reviewable_scores.created_at)")
    .order("date(reviewable_scores.created_at)")
    .count
end

.custom_filters ⇒ Object 



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# File 'app/models/reviewable.rb', line 75

def self.custom_filters
  @reviewable_filters ||= []
end

.default_visible ⇒ Object 



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# File 'app/models/reviewable.rb', line 60

def self.default_visible
  where("score >= ?", min_score_for_priority)
end

.list_for(user, ids: nil, status: :pending, category_id: nil, topic_id: nil, type: nil, limit: nil, offset: nil, priority: nil, username: nil, reviewed_by: nil, sort_order: nil, from_date: nil, to_date: nil, additional_filters: {}, preload: true, include_claimed_by_others: true) ⇒ Object 



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# File 'app/models/reviewable.rb', line 423

def self.list_for(
  user,
  ids: nil,
  status: :pending,
  category_id: nil,
  topic_id: nil,
  type: nil,
  limit: nil,
  offset: nil,
  priority: nil,
  username: nil,
  reviewed_by: nil,
  sort_order: nil,
  from_date: nil,
  to_date: nil,
  additional_filters: {},
  preload: true,
  include_claimed_by_others: true
)
  order =
    case sort_order
    when "score_asc"
      "reviewables.score ASC, reviewables.created_at DESC"
    when "created_at"
      "reviewables.created_at DESC, reviewables.score DESC"
    when "created_at_asc"
      "reviewables.created_at ASC, reviewables.score DESC"
    else
      "reviewables.score DESC, reviewables.created_at DESC"
    end

  if username.present?
    user_id = User.find_by_username(username)&.id
    return none if user_id.blank?
  end

  return none if user.blank?
  result = viewable_by(user, order: order, preload: preload)

  result = by_status(result, status)
  result = result.where(id: ids) if ids

  result = result.where("reviewables.type = ?", Reviewable.sti_class_for(type).sti_name) if type
  result = result.where("reviewables.category_id = ?", category_id) if category_id
  result = result.where("reviewables.topic_id = ?", topic_id) if topic_id
  result = result.where("reviewables.created_at >= ?", from_date) if from_date
  result = result.where("reviewables.created_at <= ?", to_date) if to_date

  if reviewed_by
    reviewed_by_id = User.find_by_username(reviewed_by)&.id
    return none if reviewed_by_id.nil?

    result = result.joins(<<~SQL)
      INNER JOIN(
        SELECT reviewable_id
        FROM reviewable_histories
        WHERE reviewable_history_type = #{ReviewableHistory.types[:transitioned]} AND
        status <> #{statuses[:pending]} AND created_by_id = #{reviewed_by_id}
      ) AS rh ON rh.reviewable_id = reviewables.id
    SQL
  end

  min_score = min_score_for_priority(priority)

  if min_score > 0 && status == :pending
    result = result.where("reviewables.score >= ? OR reviewables.force_review", min_score)
  elsif min_score > 0
    result = result.where("reviewables.score >= ?", min_score)
  end

  if !custom_filters.empty?
    result =
      custom_filters.reduce(result) do |memo, filter|
        key = filter.first
        filter_query = filter.last

        next(memo) unless additional_filters[key]
        filter_query.call(result, additional_filters[key])
      end
  end

  # If a reviewable doesn't have a target, allow us to filter on who created that reviewable.
  # A ReviewableQueuedPost may have a target_created_by_id even before a target get's assigned
  if user_id
    result =
      result.where(
        "(reviewables.target_id IS NULL AND reviewables.created_by_id = :user_id)
      OR (reviewables.target_created_by_id = :user_id)",
        user_id: user_id,
      )
  end

  if !include_claimed_by_others
    result =
      result.joins(
        "LEFT JOIN reviewable_claimed_topics rct ON reviewables.topic_id = rct.topic_id",
      ).where("rct.user_id IS NULL OR rct.user_id = ?", user.id)
  end
  result = result.limit(limit) if limit
  result = result.offset(offset) if offset
  result
end

.lookup_serializer_for(type) ⇒ Object 



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# File 'app/models/reviewable.rb', line 550

def self.lookup_serializer_for(type)
  "#{type}Serializer".constantize
rescue NameError
  ReviewableSerializer
end

.min_score_for_priority(priority = nil) ⇒ Object 



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# File 'app/models/reviewable.rb', line 241

def self.min_score_for_priority(priority = nil)
  priority ||= SiteSetting.reviewable_default_visibility
  id = priorities[priority]
  return 0.0 if id.nil?
  PluginStore.get("reviewables", "priority_#{id}").to_f
end

.needs_review!(target: nil, topic: nil, created_by:, payload: nil, reviewable_by_moderator: false, potential_spam: true, target_created_by: nil) ⇒ Object

Create a new reviewable, or if the target has already been reviewed return it to the pending state and re-use it.

You probably want to call this to create your reviewable rather than ‘.create`.



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# File 'app/models/reviewable.rb', line 98

def self.needs_review!(
  target: nil,
  topic: nil,
  created_by:,
  payload: nil,
  reviewable_by_moderator: false,
  potential_spam: true,
  target_created_by: nil
)
  reviewable =
    new(
      target: target,
      topic: topic,
      created_by: created_by,
      reviewable_by_moderator: reviewable_by_moderator,
      payload: payload,
      potential_spam: potential_spam,
      target_created_by: target_created_by,
    )
  reviewable.created_new!

  if target.blank? || !Reviewable.where(target: target, type: reviewable.type).exists?
    # If there is no target, or no existing reviewable with matching target and type, there's no chance of a conflict
    reviewable.save!
  else
    # In this case, a reviewable might already exist for this (type, target_id) index.
    # ActiveRecord can only validate indexes using a SELECT before the INSERT which
    # is not safe under concurrency. Instead, we perform an UPDATE on the status, and return
    # the previous value. We then know:
    #
    #   a) if a previous row existed
    #   b) if it was changed
    #
    # And that allows us to complete our logic.

    update_args = {
      status: statuses[:pending],
      id: target.id,
      type: target.class.polymorphic_name,
      potential_spam: potential_spam == true ? true : nil,
    }

    row = DB.query_single(<<~SQL, update_args)
      UPDATE reviewables
      SET status = :status,
        potential_spam = COALESCE(:potential_spam, reviewables.potential_spam)
      FROM reviewables AS old_reviewables
      WHERE reviewables.target_id = :id
        AND reviewables.target_type = :type
      RETURNING old_reviewables.status
    SQL
    old_status = row[0]

    if old_status.blank?
      reviewable.save!
    else
      reviewable = find_by(target: target)

      if old_status != statuses[:pending]
        # If we're transitioning back from reviewed to pending, we should recalculate
        # the score to prevent posts from being hidden.
        reviewable.recalculate_score
        reviewable.log_history(:transitioned, created_by)
      end
    end
  end

  reviewable
end

.pending_count(user) ⇒ Object 



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# File 'app/models/reviewable.rb', line 415

def self.pending_count(user)
  list_for(user).count
end

.score_required_to_hide_post ⇒ Object 



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# File 'app/models/reviewable.rb', line 237

def self.score_required_to_hide_post
  sensitivity_score(SiteSetting.hide_post_sensitivity)
end

.score_to_auto_close_topic ⇒ Object 



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# File 'app/models/reviewable.rb', line 229

def self.score_to_auto_close_topic
  sensitivity_score(SiteSetting.auto_close_topic_sensitivity, scale: 2.5)
end

.scores_with_topics ⇒ Object 



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# File 'app/models/reviewable.rb', line 569

def self.scores_with_topics
  ReviewableScore.joins(reviewable: :topic).where("reviewables.type = ?", name)
end

.sensitivity_score(sensitivity, scale: 1.0) ⇒ Object 



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# File 'app/models/reviewable.rb', line 222

def self.sensitivity_score(sensitivity, scale: 1.0)
  # If the score is less than the default visibility, bring it up to that level.
  # Otherwise we have the confusing situation where a post might be hidden and
  # moderators would never see it!
  [sensitivity_score_value(sensitivity, scale), min_score_for_priority].max
end

.sensitivity_score_value(sensitivity, scale) ⇒ Object 



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# File 'app/models/reviewable.rb', line 211

def self.sensitivity_score_value(sensitivity, scale)
  return Float::MAX if sensitivity == 0

  ratio = sensitivity / sensitivities[:low].to_f
  high =
    (PluginStore.get("reviewables", "priority_#{priorities[:high]}") || typical_sensitivity).to_f

  # We want this to be hard to reach
  ((high.to_f * ratio) * scale).truncate(2)
end

.serializer_for(reviewable) ⇒ Object 



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# File 'app/models/reviewable.rb', line 556

def self.serializer_for(reviewable)
  type = reviewable.type
  @@serializers ||= {}
  @@serializers[type] ||= lookup_serializer_for(type)
end

.set_priorities(values) ⇒ Object 



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# File 'app/models/reviewable.rb', line 204

def self.set_priorities(values)
  values.each do |k, v|
    id = priorities[k]
    PluginStore.set("reviewables", "priority_#{id}", v) unless id.nil?
  end
end

.spam_score_to_silence_new_user ⇒ Object 



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# File 'app/models/reviewable.rb', line 233

def self.spam_score_to_silence_new_user
  sensitivity_score(SiteSetting.silence_new_user_sensitivity, scale: 0.6)
end

.types ⇒ Object 



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# File 'app/models/reviewable.rb', line 71

def self.types
  %w[ReviewableFlaggedPost ReviewableQueuedPost ReviewableUser ReviewablePost]
end

.typical_sensitivity ⇒ Object

This number comes from looking at forums in the wild and what numbers work. As the site accumulates real data it’ll be based on the site activity instead.



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# File 'app/models/reviewable.rb', line 56

def self.typical_sensitivity
  12.5
end

.unseen_list_for(user, preload: true, limit: nil) ⇒ Object 



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# File 'app/models/reviewable.rb', line 526

def self.unseen_list_for(user, preload: true, limit: nil)
  results = list_for(user, preload: preload, limit: limit, include_claimed_by_others: false)
  if user.last_seen_reviewable_id
    results = results.where("reviewables.id > ?", user.last_seen_reviewable_id)
  end
  results
end

.unseen_reviewable_count(user) ⇒ Object 



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# File 'app/models/reviewable.rb', line 419

def self.unseen_reviewable_count(user)
  self.unseen_list_for(user).count
end

.user_menu_list_for(user, limit: 30) ⇒ Object 



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# File 'app/models/reviewable.rb', line 534

def self.user_menu_list_for(user, limit: 30)
  list_for(user, limit: limit, status: :pending, include_claimed_by_others: false).to_a
end

.valid_type?(type) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/reviewable.rb', line 64

def self.valid_type?(type)
  return false unless Reviewable.types.include?(type)
  type.constantize <= Reviewable
rescue NameError
  false
end

.viewable_by(user, order: nil, preload: true) ⇒ Object 



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# File 'app/models/reviewable.rb', line 385

def self.viewable_by(user, order: nil, preload: true)
  return none unless user.present?

  result = self.order(order || "reviewables.score desc, reviewables.created_at desc")

  if preload
    result =
      result.includes(
        { created_by: :user_stat },
        :topic,
        :target,
        :target_created_by,
        :reviewable_histories,
      ).includes(reviewable_scores: { user: :user_stat, meta_topic: :posts })
  end
  return result if user.admin?

  group_ids =
    SiteSetting.enable_category_group_moderation? ? user.group_users.pluck(:group_id) : []

  result.where(
    "(reviewables.reviewable_by_moderator AND :staff) OR (reviewables.reviewable_by_group_id IN (:group_ids))",
    staff: user.staff?,
    group_ids: group_ids,
  ).where(
    "reviewables.category_id IS NULL OR reviewables.category_id IN (?)",
    Guardian.new(user).allowed_category_ids,
  )
end

Instance Method Details

#actions_for(guardian, args = nil) ⇒ Object 



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# File 'app/models/reviewable.rb', line 270

def actions_for(guardian, args = nil)
  args ||= {}

  Actions.new(self, guardian).tap { |actions| build_actions(actions, guardian, args) }
end

#add_score(user, reviewable_score_type, reason: nil, created_at: nil, take_action: false, meta_topic_id: nil, force_review: false) ⇒ Object 



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# File 'app/models/reviewable.rb', line 168

def add_score(
  user,
  reviewable_score_type,
  reason: nil,
  created_at: nil,
  take_action: false,
  meta_topic_id: nil,
  force_review: false
)
  type_bonus = PostActionType.where(id: reviewable_score_type).pluck(:score_bonus)[0] || 0
  take_action_bonus = take_action ? 5.0 : 0.0
  user_accuracy_bonus = ReviewableScore.user_accuracy_bonus(user)
  sub_total = ReviewableScore.calculate_score(user, type_bonus, take_action_bonus)

  rs =
    reviewable_scores.new(
      user: user,
      status: :pending,
      reviewable_score_type: reviewable_score_type,
      score: sub_total,
      user_accuracy_bonus: user_accuracy_bonus,
      meta_topic_id: meta_topic_id,
      take_action_bonus: take_action_bonus,
      created_at: created_at || Time.zone.now,
    )
  rs.reason = reason.to_s if reason
  rs.save!

  update(score: self.score + rs.score, latest_score: rs.created_at, force_review: force_review)
  topic.update(reviewable_score: topic.reviewable_score + rs.score) if topic

  DiscourseEvent.trigger(:reviewable_score_updated, self)

  rs
end

#apply_review_group ⇒ Object 



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# File 'app/models/reviewable.rb', line 261

def apply_review_group
  unless SiteSetting.enable_category_group_moderation? && category.present? &&
           category.reviewable_by_group_id
    return
  end

  self.reviewable_by_group_id = category.reviewable_by_group_id
end

#basic_serializer ⇒ Object 



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# File 'app/models/reviewable.rb', line 546

def basic_serializer
  TYPE_TO_BASIC_SERIALIZER[self.type.to_sym] || BasicReviewableSerializer
end

#build_actions(actions, guardian, args) ⇒ Object

subclasses must implement “build_actions” to list the actions they’re capable of

Raises:

  • (NotImplementedError) 


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# File 'app/models/reviewable.rb', line 284

def build_actions(actions, guardian, args)
  raise NotImplementedError
end

#build_editable_fields(actions, guardian, args) ⇒ Object

subclasses can implement “build_editable_fields” to list stuff that can be edited



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# File 'app/models/reviewable.rb', line 289

def build_editable_fields(actions, guardian, args)
end

#create_result(status, transition_to = nil) {|result| ... } ⇒ Object

Yields:

  • (result) 


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# File 'app/models/reviewable.rb', line 562

def create_result(status, transition_to = nil)
  result = PerformResult.new(self, status)
  result.transition_to = transition_to
  yield result if block_given?
  result
end

#created_new! ⇒ Object 



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# File 'app/models/reviewable.rb', line 87

def created_new!
  self.created_new = true
  self.topic = target.topic if topic.blank? && target.is_a?(Post)
  self.target_created_by_id ||= target.is_a?(Post) ? target.user_id : nil
  self.category_id = topic.category_id if category_id.blank? && topic.present?
end

#delete_user_actions(actions, bundle = nil, require_reject_reason: false) ⇒ Object 



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# File 'app/models/reviewable.rb', line 659

def (actions, bundle = nil, require_reject_reason: false)
  bundle ||=
    actions.add_bundle(
      "reject_user",
      icon: "user-times",
      label: "reviewables.actions.reject_user.title",
    )

  actions.add(:delete_user, bundle: bundle) do |a|
    a.icon = "user-times"
    a.label = "reviewables.actions.reject_user.delete.title"
    a.require_reject_reason = require_reject_reason
  end

  actions.add(:delete_user_block, bundle: bundle) do |a|
    a.icon = "ban"
    a.label = "reviewables.actions.reject_user.block.title"
    a.require_reject_reason = require_reject_reason
    a.description = "reviewables.actions.reject_user.block.description"
  end
end

#editable_for(guardian, args = nil) ⇒ Object 



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# File 'app/models/reviewable.rb', line 276

def editable_for(guardian, args = nil)
  args ||= {}
  EditableFields
    .new(self, guardian, args)
    .tap { |fields| build_editable_fields(fields, guardian, args) }
end

#explain_score ⇒ Object 



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# File 'app/models/reviewable.rb', line 591

def explain_score
  DB.query(<<~SQL, reviewable_id: id)
    SELECT rs.reviewable_id,
      rs.user_id,
      CASE WHEN (u.admin OR u.moderator) THEN 5.0 ELSE u.trust_level END AS trust_level_bonus,
      us.flags_agreed,
      us.flags_disagreed,
      us.flags_ignored,
      rs.score,
      rs.user_accuracy_bonus,
      rs.take_action_bonus,
      COALESCE(pat.score_bonus, 0.0) AS type_bonus
    FROM reviewable_scores AS rs
    INNER JOIN users AS u ON u.id = rs.user_id
    LEFT OUTER JOIN user_stats AS us ON us.user_id = rs.user_id
    LEFT OUTER JOIN post_action_types AS pat ON pat.id = rs.reviewable_score_type
      WHERE rs.reviewable_id = :reviewable_id
  SQL
end

#history ⇒ Object 



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# File 'app/models/reviewable.rb', line 248

def history
  reviewable_histories.order(:created_at)
end

#log_history(reviewable_history_type, performed_by, edited: nil) ⇒ Object 



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# File 'app/models/reviewable.rb', line 252

def log_history(reviewable_history_type, performed_by, edited: nil)
  reviewable_histories.create!(
    reviewable_history_type: reviewable_history_type,
    status: status,
    created_by: performed_by,
    edited: edited,
  )
end

#perform(performed_by, action_id, args = nil) ⇒ Object

Delegates to a ‘perform_#action_id` method, which returns a `PerformResult` with the result of the operation and whether the status of the reviewable changed.

Raises:



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# File 'app/models/reviewable.rb', line 314

def perform(performed_by, action_id, args = nil)
  args ||= {}
  # Support this action or any aliases
  aliases = self.class.action_aliases
  valid = [action_id, aliases.to_a.select { |k, v| v == action_id }.map(&:first)].flatten

  # Ensure the user has access to the action
  actions = actions_for(args[:guardian] || Guardian.new(performed_by), args)
  raise InvalidAction.new(action_id, self.class) unless valid.any? { |a| actions.has?(a) }

  perform_method = "perform_#{aliases[action_id] || action_id}".to_sym
  raise InvalidAction.new(action_id, self.class) unless respond_to?(perform_method)

  result = nil
  update_count = false
  Reviewable.transaction do
    increment_version!(args[:version])
    result = public_send(perform_method, performed_by, args)

    raise ActiveRecord::Rollback unless result.success?

    update_count = transition_to(result.transition_to, performed_by) if result.transition_to
    update_flag_stats(**result.update_flag_stats) if result.update_flag_stats

    recalculate_score if result.recalculate_score
  end
  result.after_commit.call if result && result.after_commit

  if update_count || result.remove_reviewable_ids.present?
    Jobs.enqueue(
      :notify_reviewable,
      reviewable_id: self.id,
      performing_username: performed_by.username,
      updated_reviewable_ids: result.remove_reviewable_ids,
    )
  end

  result
end

#recalculate_score ⇒ Object 



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# File 'app/models/reviewable.rb', line 611

def recalculate_score
  # pending/agreed scores count
  sql = <<~SQL
    UPDATE reviewables
    SET score = COALESCE((
      SELECT sum(score)
      FROM reviewable_scores AS rs
      WHERE rs.reviewable_id = :id
        AND rs.status IN (:pending, :agreed)
    ), 0.0)
    WHERE id = :id
    RETURNING score
  SQL

  result =
    DB.query(
      sql,
      id: self.id,
      pending: ReviewableScore.statuses[:pending],
      agreed: ReviewableScore.statuses[:agreed],
    )

  # Update topic score
  sql = <<~SQL
    UPDATE topics
    SET reviewable_score = COALESCE((
      SELECT SUM(score)
      FROM reviewables AS r
      WHERE r.topic_id = :topic_id
        AND r.status IN (:pending, :approved)
    ), 0.0)
    WHERE id = :topic_id
  SQL

  DB.query(
    sql,
    topic_id: topic_id,
    pending: self.class.statuses[:pending],
    approved: self.class.statuses[:approved],
  )

  self.score = result[0].score

  DiscourseEvent.trigger(:reviewable_score_updated, self)

  self.score
end

#serializer ⇒ Object 



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# File 'app/models/reviewable.rb', line 542

def serializer
  self.class.serializer_for(self)
end

#transition_to(status_symbol, performed_by) ⇒ Object 



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# File 'app/models/reviewable.rb', line 360

def transition_to(status_symbol, performed_by)
  self.status = status_symbol
  save!

  log_history(:transitioned, performed_by)
  DiscourseEvent.trigger(:reviewable_transitioned_to, status_symbol, self)

  if score_status = ReviewableScore.score_transitions[status_symbol]
    updatable_reviewable_scores.update_all(
      status: score_status,
      reviewed_by_id: performed_by.id,
      reviewed_at: Time.zone.now,
    )
  end

  status_previously_changed?(from: "pending")
end

#updatable_reviewable_scores ⇒ Object

Override this in specific reviewable type to include scores for non-pending reviewables



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# File 'app/models/reviewable.rb', line 356

def updatable_reviewable_scores
  reviewable_scores.pending
end

#update_fields(params, performed_by, version: nil) ⇒ Object 



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# File 'app/models/reviewable.rb', line 292

def update_fields(params, performed_by, version: nil)
  return true if params.blank?

  (params[:payload] || {}).each { |k, v| self.payload[k] = v }
  self.category_id = params[:category_id] if params.has_key?(:category_id)

  result = false

  Reviewable.transaction do
    increment_version!(version)
    changes_json = changes.as_json
    changes_json.delete("version")

    result = save
    log_history(:edited, performed_by, edited: changes_json) if result
  end

  result
end