discourse/app/models/category.rb

79 lines
2.5 KiB
Ruby

class Category < ActiveRecord::Base
belongs_to :topic, dependent: :destroy
belongs_to :topic_only_relative_url,
select: "id, title",
class_name: "Topic",
foreign_key: "topic_id"
belongs_to :user
has_many :topics
has_many :category_featured_topics
has_many :featured_topics, through: :category_featured_topics, source: :topic
has_many :category_featured_users
has_many :featured_users, through: :category_featured_users, source: :user
validates :user_id, presence: true
validates :name, presence: true, uniqueness: true
validate :uncategorized_validator
before_save :ensure_slug
after_save :invalidate_site_cache
after_create :create_category_definition
after_destroy :invalidate_site_cache
scope :popular, ->{ order('topic_count desc') }
delegate :post_template, to: 'self.class'
def create_category_definition
create_topic(title: I18n.t("category.topic_prefix", category: name), user: user, pinned_at: Time.now)
update_column(:topic_id, topic.id)
topic.update_column(:category_id, id)
topic.posts.create(raw: post_template, user: user)
end
def topic_url
topic_only_relative_url.try(:relative_url)
end
def ensure_slug
self.slug = Slug.for(name)
end
# Categories are cached in the site json, so the caches need to be
# invalidated whenever the category changes.
def invalidate_site_cache
Site.invalidate_cache
end
def uncategorized_validator
errors.add(:name, I18n.t(:is_reserved)) if name == SiteSetting.uncategorized_name
errors.add(:slug, I18n.t(:is_reserved)) if slug == SiteSetting.uncategorized_name
end
# Internal: Update category stats: # of topics in past year, month, week for
# all categories.
def self.update_stats
topics = Topic
.select("COUNT(*)")
.where("topics.category_id = categories.id")
.where("categories.topic_id <> topics.id")
.visible
topics_year = topics.created_since(1.year.ago).to_sql
topics_month = topics.created_since(1.month.ago).to_sql
topics_week = topics.created_since(1.week.ago).to_sql
Category.update_all("topics_year = (#{topics_year}),
topics_month = (#{topics_month}),
topics_week = (#{topics_week})")
end
# Internal: Generate the text of post prompting to enter category
# description.
def self.post_template
I18n.t("category.post_template", replace_paragraph: I18n.t("category.replace_paragraph"))
end
end