discourse/plugins/chat/db/migrate/20211129171229_create_chat_uploads.rb

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# frozen_string_literal: true
class CreateChatUploads < ActiveRecord::Migration[6.1]
def change
create_table :chat_uploads do |t|
t.integer :chat_message_id, null: false
t.integer :upload_id, null: false
t.timestamps
end
add_index :chat_uploads, %i[chat_message_id upload_id], unique: true
end
end