Rails 4查询按月和年排序

Question

I am having trouble with the best way to do this but essentially I have a blog where I want to show an archive of the month and year of all the published blogs. Clicking a link "May 2012" will bring you to all the blogs written in between that month on the same year (for example: May 5th 2012, May 20th 2012...). Is there a way to get all the records within the same month of the same year just using created_at and passing params of the numerical month and year? Is there a better way to do this overall.

Answer 1

Try something like this in your controller:

month = Date.new(params[:year], params[:month])
@entries = Blog.where(created_at: month.all_month)

The #all_month method will create a Range containing the beginning and end of the month, and passing a Range in the where clause makes a BETWEEN query for the date.

Answer 2

Yes you can do that in Rails, eg for all blogs in May 2014:

time = DateTime.new(2014,5)
blogs = Blog.where("created_at >= ? and created_at <= ? ", time.beginning_of_month, time.end_of_month)