Migrations: Add unique index to ChatMessageReferences.
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defmodule Pleroma.Repo.Migrations.BackfillChatMessageReferences do
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use Ecto.Migration
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alias Pleroma.Chat
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alias Pleroma.ChatMessageReference
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alias Pleroma.Object
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alias Pleroma.Repo
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import Ecto.Query
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def change do
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create(unique_index(:chat_message_references, [:object_id, :chat_id]))
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end
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end
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