61 lines
1.9 KiB
Ruby
61 lines
1.9 KiB
Ruby
class DtextLink < ApplicationRecord
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belongs_to :model, polymorphic: true
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belongs_to :linked_wiki, primary_key: :title, foreign_key: :link_target, class_name: "WikiPage", optional: true
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belongs_to :linked_tag, primary_key: :name, foreign_key: :link_target, class_name: "Tag", optional: true
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enum link_type: [:wiki_link, :external_link]
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before_validation :normalize_link_target
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# validates :link_target, uniqueness: { scope: [:model_type, :model_id] }
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scope :wiki_page, -> { where(model_type: "WikiPage") }
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scope :forum_post, -> { where(model_type: "ForumPost") }
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def self.visible(user)
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# XXX the double negation is to prevent postgres from choosing a bad query
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# plan (it doesn't know that most forum posts aren't mod-only posts).
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wiki_page.or(forum_post.where.not(model_id: ForumPost.not_visible(user)))
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end
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def self.model_types
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%w[WikiPage ForumPost]
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end
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def self.new_from_dtext(dtext)
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links = []
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links += DText.parse_wiki_titles(dtext).map do |link|
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DtextLink.new(link_type: :wiki_link, link_target: link)
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end
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links += DText.parse_external_links(dtext).map do |link|
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DtextLink.new(link_type: :external_link, link_target: link)
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end
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links
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end
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def self.search(params)
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q = search_attributes(params, :id, :created_at, :updated_at, :link_type, :link_target, :model, :linked_wiki, :linked_tag)
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q.apply_default_order(params)
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end
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def normalize_link_target
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if wiki_link?
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self.link_target = WikiPage.normalize_title(link_target)
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end
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# postgres will raise an error if the link is more than 2712 bytes long
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# because it can't index values that take up more than 1/3 of an 8kb page.
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self.link_target = link_target.truncate(2048, omission: "")
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end
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def self.attribute_restriction(*)
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where(link_type: :wiki_link)
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end
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def self.available_includes
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[:model, :linked_wiki, :linked_tag]
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end
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end
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