all the specs pass with before each

app/models/data_point.rb

@@ -3,7 +3,7 @@ class DataPoint < ActiveRecord::Base
 
   def self.users_with_posts_on_day(time, number)
     sql = ActiveRecord::Base.connection()
-    value = sql.execute("SELECT COUNT(*) FROM (SELECT COUNT(*) AS post_sum, DATE(created_at) AS date, person_id FROM posts GROUP BY person_id, date HAVING date = '#{time.utc.to_date}') AS t1 WHERE t1.post_sum = #{number};").first[0]
+    value = sql.execute("SELECT COUNT(*) FROM (SELECT COUNT(*) AS post_sum, person_id FROM posts WHERE created_at >= '#{(time - 1.days).utc.to_datetime}' AND created_at <= '#{time.utc.to_datetime}' GROUP BY person_id) AS t1 WHERE t1.post_sum = #{number};").first[0]
     self.new(:key => number.to_s, :value => value)
   end
 end

spec/controllers/statistics_controller_spec.rb

@@ -7,13 +7,13 @@ describe StatisticsController do
     sign_in :user, alice
   end
 
-  before(:all) do
+  before do
     @stat = Statistic.new
     5.times do |n|
       bob.post(:status_message, :message => 'hi', :to => bob.aspects.first)
     end
     (0..10).each do |n|
-      @stat.data_points << DataPoint.users_with_posts_today(n)
+      @stat.data_points << DataPoint.users_with_posts_on_day(Time.now, n)
     end
     @stat.save
   end

spec/models/data_point_spec.rb

@@ -7,7 +7,7 @@ describe DataPoint do
   end
 
   context '.posts_per_day_last_week' do
-    before(:all) do
+    before do
       1.times do |n|
         alice.post(:status_message, :message => 'hi', :to => alice.aspects.first)
       end

spec/models/statistic_spec.rb

@@ -1,7 +1,7 @@
 require 'spec_helper'
 
 describe Statistic do
-  before(:all) do
+  before do
     @stat = Statistic.new
     @time = Time.now
 
@@ -80,7 +80,7 @@ describe Statistic do
   end
 
   describe '.generate' do
-    before(:all) do
+    before do
       @time = Time.now - 1.day
 
       1.times do |n|