I have three class,HotActivity, Activity撌ActivityType

HotActivity and Activity is one to one association, Activity belongs to
ActivityType

in controller I code like this

@hot_activities = HotActivity.includes(:activity)

chrome will prompt me this

user: william
N+1 Query detected
  Activity => [:activity_type]
  Add to your finder: :include => [:activity_type]
N+1 Query method call stack

if I add like this

@hot_activities = HotActivity.includes(:activity => :activity_type)

it prompt this

user: william
Unused Eager Loading detected
  HotActivity => [:activity]
  Remove from your finder: :include => [:activity] activities:575
Uniform Notifier activities:587
user: william
Unused Eager Loading detected
  Activity => [:activity_type]
  Remove from your finder: :include => [:activity_type]

some one please help,

thanks in advs

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