Query all records from a week in a month - ruby-on-rails

Question

I am creating a Rails 5 app.
In this app I got Survey model. I am able to run queries (using scopes) to get all surveys from a specific month and all from a specific quarter but I want to get all from a specific week in a month too, how can I do that?
These are my quarter and month scopes
scope :period_quarter, -> (year, quarter) { where(created_at: Date.new(year.to_i, 3 * quarter.to_i - 2).all_quarter) }
scope :period_month, -> (year, month) { where(created_at: Date.new(year.to_i, month.to_i).all_month) }
How can I add a scope to get all surveys from a specific week in a month. I will provide year, month and week (1-5).

Answer 1

Consider the same approach you've been using, only with all_week and perhaps beginning_of_week as needed to get the correct start date.

Answer 2

To get a date in a specific week, you could use something like this:
def week(year, month, week_num)
Date.new(year, month, 7 * week_num - 6)
end
week(2018, 8, 1).beginning_of_week # => Mon, 30 Jul 2018
week(2018, 8, 1).end_of_week # => Sun, 05 Aug 2018
week(2018, 8, 1).all_week # => Mon, 30 Jul 2018..Sun, 05 Aug 2018
To use this in a query, you could use it like this:
where(created_at: week(2018, 8, 1).all_week)
This will count the first week in a month as the week where the 1. is. However, if you want it to use the first full week in a month, you can remove the -6.