discourse/db/migrate/20220428094026_create_post_hotlinked_media.rb

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# frozen_string_literal: true
class CreatePostHotlinkedMedia < ActiveRecord::Migration[6.1]
def change
reversible do |dir|
dir.up do
execute <<~SQL
CREATE TYPE hotlinked_media_status AS ENUM('downloaded', 'too_large', 'download_failed', 'upload_create_failed')
SQL
end
dir.down do
execute <<~SQL
DROP TYPE hotlinked_media_status
SQL
end
end
create_table :post_hotlinked_media do |t|
t.bigint :post_id, null: false
t.string :url, null: false
t.column :status, :hotlinked_media_status, null: false
t.bigint :upload_id
t.timestamps
# Failed on some installations due to index size. Repaired in 20220428094027
# t.index [:post_id, :url], unique: true
end
execute <<~SQL
CREATE UNIQUE INDEX index_post_hotlinked_media_on_post_id_and_url_md5
ON post_hotlinked_media (post_id, md5(url));
SQL
reversible do |dir|
dir.up do
execute <<~SQL
INSERT INTO post_hotlinked_media (post_id, url, status, upload_id, created_at, updated_at)
SELECT
post_id,
obj.key AS url,
'downloaded',
obj.value::bigint AS upload_id,
pcf.created_at,
pcf.updated_at
FROM post_custom_fields pcf
JOIN json_each_text(pcf.value::json) obj ON true
JOIN uploads ON obj.value::bigint = uploads.id
WHERE name='downloaded_images'
ON CONFLICT (post_id, md5(url::text)) DO NOTHING
SQL
execute <<~SQL
INSERT INTO post_hotlinked_media (post_id, url, status, upload_id, created_at, updated_at)
SELECT
post_id,
url.value,
'download_failed',
NULL,
pcf.created_at,
pcf.updated_at
FROM post_custom_fields pcf
JOIN json_array_elements_text(pcf.value::json) url ON true
WHERE name='broken_images'
ON CONFLICT (post_id, md5(url::text)) DO NOTHING
SQL
execute <<~SQL
INSERT INTO post_hotlinked_media (post_id, url, status, upload_id, created_at, updated_at)
SELECT
post_id,
url.value,
'too_large',
NULL,
pcf.created_at,
pcf.updated_at
FROM post_custom_fields pcf
JOIN json_array_elements_text(pcf.value::json) url ON true
WHERE name='large_images'
ON CONFLICT (post_id, md5(url::text)) DO NOTHING
SQL
end
end
end
end