Question

I want to search for all declarations in a certain month number. “declaration_date” is a datetime attribute. I have this, but it fails, any ideas?

declaration = Declarations.all(:conditions => ['declaration_date.strftime("%-m") = 2')

Answer 1

Do you want declarations within a month in a specific year? If so, try something like this:

time_range = (DateTime.new(2001,2,3) - 1.month)..DateTime.new(2001,2,3)
declaration = Declaration.where( 'declaration_date' => time_range )

You can follow this technique to get declarations in the same month over several years.

See also, section 11.3 of the Active Record Query Interface docs http://guides.rubyonrails.org/active_record_querying.html