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discourse/app/models/post.rb
David Taylor 6520697b5c FIX: Remove plugin.enabled? checks at initialization time (#6166) 
Checking `plugin.enabled?` while initializing plugins causes issues in two ways:
- An application restart is required for changes to take effect. A load-balanced multi-server environment could behave very weirdly if containers restart at different times.
- In a multisite environment, it takes the `enabled?` setting from the default site. Changes on that site affect all other sites in the cluster.

Instead, `plugin.enabled?` should be checked at runtime, in the context of a request. This commit removes `plugin.enabled?` from many `instance.rb` methods.

I have added a working `plugin.enabled?` implementation for methods that actually affect security/functionality:
- `post_custom_fields_whitelist`
- `whitelist_staff_user_custom_field`
- `add_permitted_post_create_param`
2018-07-25 16:51:45 +01:00

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require_dependency 'pretty_text'
require_dependency 'rate_limiter'
require_dependency 'post_revisor'
require_dependency 'enum'
require_dependency 'post_analyzer'
require_dependency 'validators/post_validator'
require_dependency 'plugin/filter'
require 'archetype'
require 'digest/sha1'
class Post < ActiveRecord::Base
include RateLimiter::OnCreateRecord
include Trashable
include Searchable
include HasCustomFields
include LimitedEdit
cattr_accessor :plugin_permitted_create_params
self.plugin_permitted_create_params = {}
# increase this number to force a system wide post rebake
# Version 1, was the initial version
# Version 2 15-12-2017, introduces CommonMark and a huge number of onebox fixes
BAKED_VERSION = 2
rate_limit
rate_limit :limit_posts_per_day
belongs_to :user
belongs_to :topic
belongs_to :reply_to_user, class_name: "User"
has_many :post_replies
has_many :replies, through: :post_replies
has_many :post_actions
has_many :topic_links
has_many :group_mentions, dependent: :destroy
has_many :post_uploads
has_many :uploads, through: :post_uploads
has_one :post_stat
has_one :incoming_email
has_many :post_details
has_many :post_revisions
has_many :revisions, -> { order(:number) }, foreign_key: :post_id, class_name: 'PostRevision'
has_many :user_actions, foreign_key: :target_post_id
validates_with ::Validators::PostValidator
after_save :index_search
after_save :create_user_action
# We can pass several creating options to a post via attributes
attr_accessor :image_sizes, :quoted_post_numbers, :no_bump, :invalidate_oneboxes, :cooking_options, :skip_unique_check
LARGE_IMAGES ||= "large_images".freeze
BROKEN_IMAGES ||= "broken_images".freeze
DOWNLOADED_IMAGES ||= "downloaded_images".freeze
SHORT_POST_CHARS ||= 1200
scope :private_posts_for_user, ->(user) {
where("posts.topic_id IN (SELECT topic_id
FROM topic_allowed_users
WHERE user_id = :user_id
UNION ALL
SELECT tg.topic_id
FROM topic_allowed_groups tg
JOIN group_users gu ON gu.user_id = :user_id AND
gu.group_id = tg.group_id)",
user_id: user.id)
}
scope :by_newest, -> { order('created_at DESC, id DESC') }
scope :by_post_number, -> { order('post_number ASC') }
scope :with_user, -> { includes(:user) }
scope :created_since, -> (time_ago) { where('posts.created_at > ?', time_ago) }
scope :public_posts, -> { joins(:topic).where('topics.archetype <> ?', Archetype.private_message) }
scope :private_posts, -> { joins(:topic).where('topics.archetype = ?', Archetype.private_message) }
scope :with_topic_subtype, ->(subtype) { joins(:topic).where('topics.subtype = ?', subtype) }
scope :visible, -> { joins(:topic).where('topics.visible = true').where(hidden: false) }
scope :secured, -> (guardian) { where('posts.post_type IN (?)', Topic.visible_post_types(guardian&.user)) }
scope :for_mailing_list, ->(user, since) {
q = created_since(since)
.joins(:topic)
.where(topic: Topic.for_digest(user, Time.at(0))) # we want all topics with new content, regardless when they were created
q = q.where.not(post_type: Post.types[:whisper]) unless user.staff?
q.order('posts.created_at ASC')
}
scope :raw_match, -> (pattern, type = 'string') {
type = type&.downcase
case type
when 'string'
where('raw ILIKE ?', "%#{pattern}%")
when 'regex'
where('raw ~ ?', "(?n)#{pattern}")
end
}
delegate :username, to: :user
def self.hidden_reasons
@hidden_reasons ||= Enum.new(flag_threshold_reached: 1,
flag_threshold_reached_again: 2,
new_user_spam_threshold_reached: 3,
flagged_by_tl3_user: 4)
end
def self.types
@types ||= Enum.new(regular: 1,
moderator_action: 2,
small_action: 3,
whisper: 4)
end
def self.cook_methods
@cook_methods ||= Enum.new(regular: 1,
raw_html: 2,
email: 3)
end
def self.find_by_detail(key, value)
includes(:post_details).find_by(post_details: { key: key, value: value })
end
def whisper?
post_type == Post.types[:whisper]
end
def add_detail(key, value, extra = nil)
post_details.build(key: key, value: value, extra: extra)
end
def limit_posts_per_day
if user && user.new_user_posting_on_first_day? && post_number && post_number > 1
RateLimiter.new(user, "first-day-replies-per-day", SiteSetting.max_replies_in_first_day, 1.day.to_i)
end
end
def publish_change_to_clients!(type, options = {})
# special failsafe for posts missing topics consistency checks should fix, but message
# is safe to skip
return unless topic
channel = "/topic/#{topic_id}"
msg = {
id: id,
post_number: post_number,
updated_at: Time.now,
user_id: user_id,
last_editor_id: last_editor_id,
type: type,
version: version
}.merge(options)
if Topic.visible_post_types.include?(post_type)
if topic.private_message?
user_ids = User.where('admin or moderator').pluck(:id)
user_ids |= topic.allowed_users.pluck(:id)
MessageBus.publish(channel, msg, user_ids: user_ids)
else
MessageBus.publish(channel, msg, group_ids: topic.secure_group_ids)
end
else
user_ids = User.where('admin or moderator or id = ?', user_id).pluck(:id)
MessageBus.publish(channel, msg, user_ids: user_ids)
end
end
def trash!(trashed_by = nil)
self.topic_links.each(&:destroy)
super(trashed_by)
end
def recover!
super
update_flagged_posts_count
TopicLink.extract_from(self)
QuotedPost.extract_from(self)
if topic && topic.category_id && topic.category
topic.category.update_latest
end
end
# The key we use in redis to ensure unique posts
def unique_post_key
"unique-post-#{user_id}:#{raw_hash}"
end
def store_unique_post_key
if SiteSetting.unique_posts_mins > 0
$redis.setex(unique_post_key, SiteSetting.unique_posts_mins.minutes.to_i, id)
end
end
def matches_recent_post?
post_id = $redis.get(unique_post_key)
post_id != (nil) && post_id.to_i != (id)
end
def raw_hash
return if raw.blank?
Digest::SHA1.hexdigest(raw)
end
def self.white_listed_image_classes
@white_listed_image_classes ||= ['avatar', 'favicon', 'thumbnail', 'emoji']
end
def post_analyzer
@post_analyzers ||= {}
@post_analyzers[raw_hash] ||= PostAnalyzer.new(raw, topic_id)
end
%w{raw_mentions
linked_hosts
image_count
attachment_count
link_count
raw_links
has_oneboxes?}.each do |attr|
define_method(attr) do
post_analyzer.send(attr)
end
end
def add_nofollow?
user.blank? || SiteSetting.tl3_links_no_follow? || !user.has_trust_level?(TrustLevel[3])
end
def omit_nofollow?
!add_nofollow?
end
def cook(raw, opts = {})
# For some posts, for example those imported via RSS, we support raw HTML. In that
# case we can skip the rendering pipeline.
return raw if cook_method == Post.cook_methods[:raw_html]
options = opts.dup
options[:cook_method] = cook_method
post_user = self.user
options[:user_id] = post_user.id if post_user
if add_nofollow?
cooked = post_analyzer.cook(raw, options)
else
# At trust level 3, we don't apply nofollow to links
options[:omit_nofollow] = true
cooked = post_analyzer.cook(raw, options)
end
new_cooked = Plugin::Filter.apply(:after_post_cook, self, cooked)
if post_type == Post.types[:regular]
if new_cooked != cooked && new_cooked.blank?
Rails.logger.debug("Plugin is blanking out post: #{self.url}\nraw: #{raw}")
elsif new_cooked.blank?
Rails.logger.debug("Blank post detected post: #{self.url}\nraw: #{raw}")
end
end
new_cooked
end
# Sometimes the post is being edited by someone else, for example, a mod.
# If that's the case, they should not be bound by the original poster's
# restrictions, for example on not posting images.
def acting_user
@acting_user || user
end
def acting_user=(pu)
@acting_user = pu
end
def last_editor
self.last_editor_id ? (User.find_by_id(self.last_editor_id) || user) : user
end
def whitelisted_spam_hosts
hosts = SiteSetting
.white_listed_spam_host_domains
.split('|')
.map { |h| h.strip }
.reject { |h| !h.include?('.') }
hosts << GlobalSetting.hostname
hosts << RailsMultisite::ConnectionManagement.current_hostname
end
def total_hosts_usage
hosts = linked_hosts.clone
whitelisted = whitelisted_spam_hosts
hosts.reject! do |h|
whitelisted.any? do |w|
h.end_with?(w)
end
end
return hosts if hosts.length == 0
TopicLink.where(domain: hosts.keys, user_id: acting_user.id)
.group(:domain, :post_id)
.count
.each_key do |tuple|
domain = tuple[0]
hosts[domain] = (hosts[domain] || 0) + 1
end
hosts
end
# Prevent new users from posting the same hosts too many times.
def has_host_spam?
return false if acting_user.present? && (acting_user.staged? || acting_user.has_trust_level?(TrustLevel[1]))
return false if topic&.private_message?
total_hosts_usage.values.any? { |count| count >= SiteSetting.newuser_spam_host_threshold }
end
def archetype
topic&.archetype
end
def self.regular_order
order(:sort_order, :post_number)
end
def self.reverse_order
order('sort_order desc, post_number desc')
end
def self.summary(topic_id = nil)
# PERF: if you pass in nil it is WAY slower
# pg chokes getting a reasonable plan
topic_id = topic_id ? topic_id.to_i : "posts.topic_id"
# percent rank has tons of ties
where(["post_number = 1 or id in (
SELECT p1.id
FROM posts p1
WHERE p1.percent_rank <= ? AND
p1.topic_id = #{topic_id}
ORDER BY p1.percent_rank
LIMIT ?
)",
SiteSetting.summary_percent_filter.to_f / 100.0,
SiteSetting.summary_max_results
])
end
def update_flagged_posts_count
PostAction.update_flagged_posts_count
end
def filter_quotes(parent_post = nil)
return cooked if parent_post.blank?
# We only filter quotes when there is exactly 1
return cooked unless (quote_count == 1)
parent_raw = parent_post.raw.sub(/\[quote.+\/quote\]/m, '')
if raw[parent_raw] || (parent_raw.size < SHORT_POST_CHARS)
return cooked.sub(/\<aside.+\<\/aside\>/m, '')
end
cooked
end
def external_id
"#{topic_id}/#{post_number}"
end
def reply_to_post
return if reply_to_post_number.blank?
@reply_to_post ||= Post.find_by("topic_id = :topic_id AND post_number = :post_number", topic_id: topic_id, post_number: reply_to_post_number)
end
def reply_notification_target
return if reply_to_post_number.blank?
Post.find_by("topic_id = :topic_id AND post_number = :post_number AND user_id <> :user_id", topic_id: topic_id, post_number: reply_to_post_number, user_id: user_id).try(:user)
end
def self.excerpt(cooked, maxlength = nil, options = {})
maxlength ||= SiteSetting.post_excerpt_maxlength
PrettyText.excerpt(cooked, maxlength, options)
end
# Strip out most of the markup
def excerpt(maxlength = nil, options = {})
Post.excerpt(cooked, maxlength, options)
end
def excerpt_for_topic
Post.excerpt(cooked, 220, strip_links: true)
end
def is_first_post?
post_number.blank? ?
topic.try(:highest_post_number) == 0 :
post_number == 1
end
def is_reply_by_email?
via_email && post_number.present? && post_number > 1
end
def is_flagged?
post_actions.where(post_action_type_id: PostActionType.flag_types_without_custom.values, deleted_at: nil).count != 0
end
def has_active_flag?
post_actions.active.where(post_action_type_id: PostActionType.flag_types_without_custom.values).count != 0
end
def unhide!
self.update_attributes(hidden: false)
self.topic.update_attributes(visible: true) if is_first_post?
save(validate: false)
publish_change_to_clients!(:acted)
end
def full_url
"#{Discourse.base_url}#{url}"
end
def url(opts = nil)
opts ||= {}
if topic
Post.url(topic.slug, topic.id, post_number, opts)
else
"/404"
end
end
def unsubscribe_url(user)
"#{Discourse.base_url}/email/unsubscribe/#{UnsubscribeKey.create_key_for(user, self)}"
end
def self.url(slug, topic_id, post_number, opts = nil)
opts ||= {}
result = "/t/"
result << "#{slug}/" unless !!opts[:without_slug]
"#{result}#{topic_id}/#{post_number}"
end
def self.urls(post_ids)
ids = post_ids.map { |u| u }
if ids.length > 0
urls = {}
Topic.joins(:posts).where('posts.id' => ids).
select(['posts.id as post_id', 'post_number', 'topics.slug', 'topics.title', 'topics.id']).
each do |t|
urls[t.post_id.to_i] = url(t.slug, t.id, t.post_number)
end
urls
else
{}
end
end
def revise(updated_by, changes = {}, opts = {})
PostRevisor.new(self).revise!(updated_by, changes, opts)
end
def self.rebake_old(limit)
problems = []
Post.where('baked_version IS NULL OR baked_version < ?', BAKED_VERSION)
.order('id desc')
.limit(limit).pluck(:id).each do |id|
begin
post = Post.find(id)
post.rebake!
rescue => e
problems << { post: post, ex: e }
attempts = post.custom_fields["rebake_attempts"].to_i
if attempts > 3
post.update_columns(baked_version: BAKED_VERSION)
Discourse.warn_exception(e, message: "Can not rebake post# #{p.id} after 3 attempts, giving up")
else
post.custom_fields["rebake_attempts"] = attempts + 1
post.save_custom_fields
end
end
end
problems
end
def rebake!(opts = nil)
opts ||= {}
new_cooked = cook(raw, topic_id: topic_id, invalidate_oneboxes: opts.fetch(:invalidate_oneboxes, false))
old_cooked = cooked
update_columns(cooked: new_cooked, baked_at: Time.new, baked_version: BAKED_VERSION)
# Extracts urls from the body
TopicLink.extract_from(self)
QuotedPost.extract_from(self)
# make sure we trigger the post process
trigger_post_process(true)
publish_change_to_clients!(:rebaked)
new_cooked != old_cooked
end
def set_owner(new_user, actor, skip_revision = false)
return if user_id == new_user.id
edit_reason = I18n.with_locale(SiteSetting.default_locale) do
I18n.t(
'change_owner.post_revision_text',
old_user: self.user&.username_lower || I18n.t('change_owner.deleted_user'),
new_user: new_user.username_lower
)
end
revise(
actor,
{ raw: self.raw, user_id: new_user.id, edit_reason: edit_reason },
bypass_bump: true, skip_revision: skip_revision, skip_validations: true
)
if post_number == topic.highest_post_number
topic.update_columns(last_post_user_id: new_user.id)
end
end
before_create do
PostCreator.before_create_tasks(self)
end
def self.estimate_posts_per_day
val = $redis.get("estimated_posts_per_day")
return val.to_i if val
posts_per_day = Topic.listable_topics.secured.joins(:posts).merge(Post.created_since(30.days.ago)).count / 30
$redis.setex("estimated_posts_per_day", 1.day.to_i, posts_per_day.to_s)
posts_per_day
end
# This calculates the geometric mean of the post timings and stores it along with
# each post.
def self.calculate_avg_time(min_topic_age = nil)
retry_lock_error do
builder = SqlBuilder.new("UPDATE posts
SET avg_time = (x.gmean / 1000)
FROM (SELECT post_timings.topic_id,
post_timings.post_number,
round(exp(avg(CASE WHEN msecs > 0 THEN ln(msecs) ELSE 0 END))) AS gmean
FROM post_timings
INNER JOIN posts AS p2
ON p2.post_number = post_timings.post_number
AND p2.topic_id = post_timings.topic_id
AND p2.user_id <> post_timings.user_id
GROUP BY post_timings.topic_id, post_timings.post_number) AS x
/*where*/")
builder.where("x.topic_id = posts.topic_id
AND x.post_number = posts.post_number
AND (posts.avg_time <> (x.gmean / 1000)::int OR posts.avg_time IS NULL)")
if min_topic_age
builder.where("posts.topic_id IN (SELECT id FROM topics where bumped_at > :bumped_at)",
bumped_at: min_topic_age)
end
builder.exec
end
end
before_save do
self.last_editor_id ||= user_id
if !new_record? && will_save_change_to_raw?
self.cooked = cook(raw, topic_id: topic_id)
end
self.baked_at = Time.new
self.baked_version = BAKED_VERSION
end
def advance_draft_sequence
return if topic.blank? # could be deleted
DraftSequence.next!(last_editor_id, topic.draft_key)
end
# TODO: move to post-analyzer?
# Determine what posts are quoted by this post
def extract_quoted_post_numbers
temp_collector = []
# Create relationships for the quotes
raw.scan(/\[quote=\"([^"]+)"\]/).each do |quote|
args = parse_quote_into_arguments(quote)
# If the topic attribute is present, ensure it's the same topic
temp_collector << args[:post] unless (args[:topic].present? && topic_id != args[:topic])
end
temp_collector.uniq!
self.quoted_post_numbers = temp_collector
self.quote_count = temp_collector.size
end
def save_reply_relationships
add_to_quoted_post_numbers(reply_to_post_number)
return if self.quoted_post_numbers.blank?
# Create a reply relationship between quoted posts and this new post
self.quoted_post_numbers.each do |p|
post = Post.find_by(topic_id: topic_id, post_number: p)
create_reply_relationship_with(post)
end
end
# Enqueue post processing for this post
def trigger_post_process(bypass_bump = false)
args = {
post_id: id,
bypass_bump: bypass_bump
}
args[:image_sizes] = image_sizes if image_sizes.present?
args[:invalidate_oneboxes] = true if invalidate_oneboxes.present?
args[:cooking_options] = self.cooking_options
Jobs.enqueue(:process_post, args)
DiscourseEvent.trigger(:after_trigger_post_process, self)
end
def self.public_posts_count_per_day(start_date, end_date, category_id = nil)
result = public_posts.where('posts.created_at >= ? AND posts.created_at <= ?', start_date, end_date)
.where(post_type: Post.types[:regular])
result = result.where('topics.category_id = ?', category_id) if category_id
result.group('date(posts.created_at)').order('date(posts.created_at)').count
end
def self.private_messages_count_per_day(start_date, end_date, topic_subtype)
private_posts.with_topic_subtype(topic_subtype).where('posts.created_at >= ? AND posts.created_at <= ?', start_date, end_date).group('date(posts.created_at)').order('date(posts.created_at)').count
end
def reply_history(max_replies = 100, guardian = nil)
post_ids = Post.exec_sql("WITH RECURSIVE breadcrumb(id, reply_to_post_number) AS (
SELECT p.id, p.reply_to_post_number FROM posts AS p
WHERE p.id = :post_id
UNION
SELECT p.id, p.reply_to_post_number FROM posts AS p, breadcrumb
WHERE breadcrumb.reply_to_post_number = p.post_number
AND p.topic_id = :topic_id
) SELECT id from breadcrumb ORDER by id", post_id: id, topic_id: topic_id).to_a
post_ids.map! { |r| r['id'].to_i }
.reject! { |post_id| post_id == id }
# [1,2,3][-10,-1] => nil
post_ids = (post_ids[(0 - max_replies)..-1] || post_ids)
Post.secured(guardian).where(id: post_ids).includes(:user, :topic).order(:id).to_a
end
MAX_REPLY_LEVEL ||= 1000
def reply_ids(guardian = nil, only_replies_to_single_post: true)
builder = SqlBuilder.new(<<~SQL, Post)
WITH RECURSIVE breadcrumb(id, level) AS (
SELECT :post_id, 0
UNION
SELECT reply_id, level + 1
FROM post_replies AS r
JOIN breadcrumb AS b ON (r.post_id = b.id)
WHERE r.post_id <> r.reply_id
AND b.level < :max_reply_level
), breadcrumb_with_count AS (
SELECT
id,
level,
COUNT(*) AS count
FROM post_replies AS r
JOIN breadcrumb AS b ON (r.reply_id = b.id)
WHERE r.reply_id <> r.post_id
GROUP BY id, level
)
SELECT id, level
FROM breadcrumb_with_count
/*where*/
ORDER BY id
SQL
builder.where("level > 0")
# ignore posts that aren't replies to exactly one post
# for example it skips a post when it contains 2 quotes (which are replies) from different posts
builder.where("count = 1") if only_replies_to_single_post
replies = builder.exec(post_id: id, max_reply_level: MAX_REPLY_LEVEL).to_a
replies.map! { |r| { id: r["id"].to_i, level: r["level"].to_i } }
secured_ids = Post.secured(guardian).where(id: replies.map { |r| r[:id] }).pluck(:id).to_set
replies.reject { |r| !secured_ids.include?(r[:id]) }
end
def revert_to(number)
return if number >= version
post_revision = PostRevision.find_by(post_id: id, number: (number + 1))
post_revision.modifications.each do |attribute, change|
attribute = "version" if attribute == "cached_version"
write_attribute(attribute, change[0])
end
end
def self.rebake_all_quoted_posts(user_id)
return if user_id.blank?
Post.exec_sql <<-SQL
WITH user_quoted_posts AS (
SELECT post_id
FROM quoted_posts
WHERE quoted_post_id IN (SELECT id FROM posts WHERE user_id = #{user_id})
)
UPDATE posts
SET baked_version = NULL
WHERE baked_version IS NOT NULL
AND id IN (SELECT post_id FROM user_quoted_posts)
SQL
end
def seen?(user)
PostTiming.where(topic_id: topic_id, post_number: post_number, user_id: user.id).exists?
end
def index_search
SearchIndexer.index(self)
end
def create_user_action
UserActionCreator.log_post(self)
end
def locked?
locked_by_id.present?
end
private
def parse_quote_into_arguments(quote)
return {} unless quote.present?
args = HashWithIndifferentAccess.new
quote.first.scan(/([a-z]+)\:(\d+)/).each do |arg|
args[arg[0]] = arg[1].to_i
end
args
end
def add_to_quoted_post_numbers(num)
return unless num.present?
self.quoted_post_numbers ||= []
self.quoted_post_numbers << num
end
def create_reply_relationship_with(post)
return if post.nil? || self.deleted_at.present?
post_reply = post.post_replies.new(reply_id: id)
if post_reply.save
if Topic.visible_post_types.include?(self.post_type)
Post.where(id: post.id).update_all ['reply_count = reply_count + 1']
end
end
end
end
# == Schema Information
#
# Table name: posts
#
# id :integer not null, primary key
# user_id :integer
# topic_id :integer not null
# post_number :integer not null
# raw :text not null
# cooked :text not null
# created_at :datetime not null
# updated_at :datetime not null
# reply_to_post_number :integer
# reply_count :integer default(0), not null
# quote_count :integer default(0), not null
# deleted_at :datetime
# off_topic_count :integer default(0), not null
# like_count :integer default(0), not null
# incoming_link_count :integer default(0), not null
# bookmark_count :integer default(0), not null
# avg_time :integer
# score :float
# reads :integer default(0), not null
# post_type :integer default(1), not null
# vote_count :integer default(0), not null
# sort_order :integer
# last_editor_id :integer
# hidden :boolean default(FALSE), not null
# hidden_reason_id :integer
# notify_moderators_count :integer default(0), not null
# spam_count :integer default(0), not null
# illegal_count :integer default(0), not null
# inappropriate_count :integer default(0), not null
# last_version_at :datetime not null
# user_deleted :boolean default(FALSE), not null
# reply_to_user_id :integer
# percent_rank :float default(1.0)
# notify_user_count :integer default(0), not null
# like_score :integer default(0), not null
# deleted_by_id :integer
# edit_reason :string
# word_count :integer
# version :integer default(1), not null
# cook_method :integer default(1), not null
# wiki :boolean default(FALSE), not null
# baked_at :datetime
# baked_version :integer
# hidden_at :datetime
# self_edits :integer default(0), not null
# reply_quoted :boolean default(FALSE), not null
# via_email :boolean default(FALSE), not null
# raw_email :text
# public_version :integer default(1), not null
# action_code :string
# image_url :string
# locked_by_id :integer
#
# Indexes
#
# idx_posts_created_at_topic_id (created_at,topic_id)
# idx_posts_deleted_posts (topic_id,post_number)
# idx_posts_user_id_deleted_at (user_id)
# index_posts_on_reply_to_post_number (reply_to_post_number)
# index_posts_on_topic_id_and_post_number (topic_id,post_number) UNIQUE
# index_posts_on_user_id_and_created_at (user_id,created_at)
#
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