discourse/plugins/chat/db/migrate/20211201171813_create_chat_reactions.rb

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# frozen_string_literal: true
class CreateChatReactions < ActiveRecord::Migration[6.1]
def change
create_table :chat_message_reactions do |t|
t.integer :chat_message_id
t.integer :user_id
t.string :emoji
t.timestamps
end
add_index :chat_message_reactions,
%i[chat_message_id user_id emoji],
unique: true,
name: :chat_message_reactions_index
end
end