Question

I saw this Count records created within the last 7 days but still need some help in getting the syntax of COUNT right, right now I have

@count_users = User.count('comment')

which gives me Count of all comments but I need to know count of all comments made only in last 7 days or in last 1 month, but I am not able to figure out the correct syntax for it

Answer 1

This count:

@count_users = User.count('comment')

Generates the following SQL:

SELECT COUNT(comment) FROM "users"

So unless you have a comment column in your users table, it is not counting the right objects.

If you have a Comment model, you can use the following to count all comments created in the past 7 days:

Comment.where('created_at >= ?', Time.zone.now - 7.days).count # count for a week
Comment.where('created_at >= ?', Time.zone.now - 1.months).count # count for a month

If you want to count the Comments of a specific User, you can use this (assuming a Comment belongs_to a User and a User has_many Comments):

Comment.where(user_id: user.i).where('created_at >= ?', Time.zone.now - 7.days).count