从 activerecord 中获取索引哈希值

如何从ActiveRecord中获取索引哈希值

ruby
class User < ApplicationRecord
  def self.index_information(table_name)
    connection.indexes(table_name)
  end
end

ruby
require 'digest'
class User < ApplicationRecord
  def self.index_information(table_name)
    indexes = connection.indexes(table_name)
    index_hashes = indexes.map do |index|
      Digest::SHA256.hexdigest(index.columns.join(","))
    end
    index_hashes
  end
end

ruby
class UsersController < ApplicationController
  def index
    index_hashes = User.index_information('users')
    render json: { index_hashes: index_hashes }
  end
end