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defmodule Pleroma.Repo.Migrations.DataMigrationPopulateUserRelationships do
use Ecto.Migration
alias Ecto.Adapters.SQL
alias Pleroma.Repo
require Logger
def up do
Enum.each(
[blocks: 1, mutes: 2, muted_reblogs: 3, muted_notifications: 4, subscribers: 5],
fn {field, relationship_type_code} ->
migrate(field, relationship_type_code)
if field == :subscribers do
drop_if_exists(index(:users, [:subscribers]))
end
end
)
end
def down, do: :noop
defp migrate(field, relationship_type_code) do
Logger.info("Processing users.#{field}...")
{:ok, %{rows: field_rows}} =
SQL.query(Repo, "SELECT id, #{field} FROM users WHERE #{field} != '{}'")
target_ap_ids =
Enum.flat_map(
field_rows,
fn [_, ap_ids] -> ap_ids end
)
|> Enum.uniq()
# Selecting ids of all targets at once in order to reduce the number of SELECT queries
{:ok, %{rows: target_ap_id_id}} =
SQL.query(Repo, "SELECT ap_id, id FROM users WHERE ap_id = ANY($1)", [target_ap_ids])
target_id_by_ap_id = Enum.into(target_ap_id_id, %{}, fn [k, v] -> {k, v} end)
Enum.each(
field_rows,
fn [source_id, target_ap_ids] ->
source_uuid = Ecto.UUID.cast!(source_id)
for target_ap_id <- target_ap_ids do
target_id = target_id_by_ap_id[target_ap_id]
with {:ok, target_uuid} <- target_id && Ecto.UUID.cast(target_id) do
execute("""
INSERT INTO user_relationships(
source_id, target_id, relationship_type, inserted_at
)
VALUES(
'#{source_uuid}'::uuid, '#{target_uuid}'::uuid, #{relationship_type_code}, now()
)
ON CONFLICT (source_id, relationship_type, target_id) DO NOTHING
""")
else
_ -> Logger.warn("Unresolved #{field} reference: (#{source_uuid}, #{target_id})")
end
end
end
)
end
end
|
