Rails，未定义的方法`total_pages‘#<PG::Result:0x007f3ede39dae0>

# 错误的做法
result = ActiveRecord::Base.connection.execute("SELECT * FROM users")
result.total_pages # 这会导致错误

# 正确的做法
users = User.all.page(params[:page])
users.total_pages # 这应该可以正常工作

gem 'kaminari'

class UsersController < ApplicationController
  def index
    @users = User.page(params[:page]).per(10)
  end
end

<%= paginate @users %>

gem 'will_paginate', '~> 3.1.0'

class UsersController < ApplicationController
  def index
    @users = User.paginate(page: params[:page], per_page: 10)
  end
end

<%= will_paginate @users %>

class UsersController < ApplicationController
  def index
    @users = User.page(params[:page]).per(10)
    Rails.logger.debug @users.class.name # 应该输出 ActiveRecord::Relation
    Rails.logger.debug @users.total_pages # 检查 total_pages 方法是否可用
  end
end