akkoma/priv/repo/migrations/20171109114020_fill_actor_field.exs

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defmodule Pleroma.Repo.Migrations.FillActorField do
use Ecto.Migration
alias Pleroma.{Repo, Activity}
def up do
max = Repo.aggregate(Activity, :max, :id)
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if max do
IO.puts("#{max} activities")
chunks = 0..(round(max / 10_000))
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Enum.each(chunks, fn (i) ->
min = i * 10_000
max = min + 10_000
execute("""
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update activities set actor = data->>'actor' where id > #{min} and id <= #{max};
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""")
|> IO.inspect
end)
end
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end
def down do
end
end