Getting count of JobApplications by day for a specific JobPosting

counts_by_day_for_job_posting.rb

def counts_by_day_for_job_posting(job_posting_id)
  results = JobApplication.where(job_posting_id: job_posting_id).
                           where(created_at: 1.month.ago..Time.now).
                           group('date(created_at)').count
  counts = []
  results.each do |result|
    h = {          date: Date.parse(result.first),
         job_posting_id: job_posting_id,
      application_count: result.last }
    counts << h
  end 
  counts
end

puts counts_by_day_for_job_posting(192).to_json