discourse/db/migrate/20140804010803_incoming_lin...

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class IncomingLinkNormalization < ActiveRecord::Migration[4.2]
2014-08-03 22:35:55 -04:00
def up
remove_column :incoming_links, :post_number
remove_column :incoming_links, :domain
add_column :incoming_links, :incoming_referer_id, :integer
create_table :incoming_referers do |t|
t.string :url, limit: 1000, null: false
t.string :domain, limit: 100, null: false
t.string :path, limit: 1000, null: false
t.integer :port, null: false
t.boolean :https, null: false
t.integer :incoming_domain_id
end
# start the shuffle
#
execute "INSERT INTO incoming_referers(url, https, domain, port, path)
SELECT referer,
CASE WHEN a[1] = 's' THEN true ELSE false END,
a[2] as domain,
CASE WHEN a[1] = 's' THEN
COALESCE(a[4]::integer, 443)::integer
ELSE
COALESCE(a[4]::integer, 80)::integer
END,
COALESCE(a[5], '') path
FROM
(
SELECT referer, regexp_matches(referer, 'http(s)?://([^/:]+)(:(\d+))?(.*)') a
FROM
(
SELECT DISTINCT referer
FROM incoming_links WHERE referer ~ '^https?://.+'
) Z
) X
WHERE a[2] IS NOT NULL"
execute "UPDATE incoming_links l
SET incoming_referer_id = r.id
FROM incoming_referers r
WHERE r.url = l.referer"
create_table :incoming_domains do |t|
t.string :name, limit: 100, null: false
t.boolean :https, null: false, default: false
t.integer :port, null: false
end
# shuffle part 2
#
execute "INSERT INTO incoming_domains(name, port, https)
SELECT DISTINCT domain, port, https
FROM incoming_referers"
execute "UPDATE incoming_referers l
SET incoming_domain_id = d.id
FROM incoming_domains d
WHERE d.name = l.domain AND d.https = l.https AND d.port = l.port"
remove_column :incoming_referers, :domain
remove_column :incoming_referers, :port
remove_column :incoming_referers, :https
change_column :incoming_referers, :incoming_domain_id, :integer, null: false
add_index :incoming_referers, [:path, :incoming_domain_id], unique: true
add_index :incoming_domains, [:name, :https, :port], unique: true
remove_column :incoming_links, :referer
end
def down
raise ActiveRecord::IrreversibleMigration
end
end