85 lines
4.3 KiB
Ruby
85 lines
4.3 KiB
Ruby
require 'csv'
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class Post < Prism::Orm::Model
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# Result of .import_csv below - `imported` are posts that actually made
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# it to disk, `skipped` are { title:, errors: } pairs for rows that
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# never did (blank title, or a slug collision that outlived
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# MAX_SLUG_ATTEMPTS).
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ImportResult = Struct.new(:imported, :skipped)
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MAX_SLUG_ATTEMPTS = 20
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belongs_to :user
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has_many :comments, dependent: :destroy
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has_many :likes, as: :likeable, dependent: :destroy
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# dependent: :destroy, not :nullify - same reasoning as comments/likes
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# above: Claim is paranoid too (see the model), so trashing this post
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# soft-deletes its claims along with it and #restore(recursive: true)
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# brings them back, rather than a plain trash permanently erasing the
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# record of who already won a giveaway slot.
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has_many :claims, dependent: :destroy
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# A deleted post lands in the trash (see PostsController#destroy/#trash/
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# #restore) instead of vanishing outright - Post.all/#find already hide
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# it everywhere else in the app for free. Comment and Like are paranoid
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# too, so the `dependent: :destroy` cascades above soft-delete them the
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# moment a post is trashed instead of removing them for real, and
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# PostsController#restore(recursive: true) brings them all back together
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# with the post (see Associable#cascade_restore_dependent_associations).
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acts_as_paranoid
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# Every post starts life as a draft (column default 0, see the
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# add_status_to_posts migration) - only #publish! on posts#show makes it
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# show up on the public index (see PostsController#index below).
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enum :status, { draft: 0, published: 1, archived: 2 }
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# Prism::Orm::Attributes: casts the "featured" checkbox's form value
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# ("1"/"0", always a String off an HTTP request - see the hidden-field
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# trick in _form.erb) into a real TrueClass/FalseClass on write, instead
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# of leaving the literal string "1" sitting in the featured column. That
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# distinction is not cosmetic: `where(featured: true)` (see the
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# .featured scope below and PostsController#index's `?featured=1`
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# filter) does a plain Ruby `==` against whatever is actually stored,
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# so a stored String would never match a query for the Boolean `true`.
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attribute :featured, :boolean, default: false
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# Same reasoning as TypeCasting.cast_integer's own comment: blank input
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# from the (optional) giveaway_slots form field casts to nil, not 0 - nil
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# means "not a giveaway post" (see #giveaway? below), 0 means "was a
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# giveaway, every slot already claimed", and those are not the same
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# state for #giveaway_sold_out? to report.
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attribute :giveaway_slots, :integer
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scope :featured, -> { where(featured: true) }
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# acts_as_list scoped by the featured flag itself: every post gets a
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# position within its own featured/non-featured group (the non-featured
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# group's numbers are never shown or reordered - see posts#index and
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# PostsController#move_up/#move_down, both gated on featured_only), so
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# toggling a post's own featured flag on/off cheaply hops it between two
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# already-maintained lists (append to the bottom of whichever group it
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# lands in) instead of needing a bespoke third state to track "not in
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# any list yet". Editors use #move_up/#move_down to curate which
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# featured posts lead the homepage instead of always showing the most
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# recently featured one first.
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acts_as_list column: :position, scope: :featured
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# Backed by the range-capable secondary index on created_at
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# (db/migrate/20260907000004_add_index_on_posts_created_at.rb) - the
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# gte/lte hash this builds is exactly what
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# Query::ConditionNode#indexable_ranges recognizes, so PostsController#index
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# chaining this onto .published (see below) hits
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# Store#lookup_by_index_range with an O(log n) binary search over
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# sorted_values instead of a full table scan. See Store#lookup_by_index_range.
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scope :created_within, ->(days) { where(created_at: { gte: Time.now.utc - (days.to_i * 86_400) }) }
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# Lets the author moderate comments (edit or remove) from the same form
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# used to edit the post itself - reject_if: :all_blank so a moderation
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# form that only ever submits EXISTING comment rows (no "add a comment"
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# field on this screen) never has to worry about accidentally building
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# a blank new one.
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accepts_nested_attributes_for :comments, allow_destroy: true, reject_if: :all_blank
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validates :title, presence: true, length: { minimum: 3 }
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end
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