fix use of [model]_loaded? for rails 3 compatibility

Change-Id: Ib3120299b48acaf9ea3af5ca8f938304ce288348
Reviewed-on: https://gerrit.instructure.com/27435
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Cody Cutrer <cody@instructure.com>
QA-Review: James Williams  <jamesw@instructure.com>
Product-Review: James Williams  <jamesw@instructure.com>

Author: maneframe

lib/canvas/builders/enrollment_date_builder.rb

@@ -30,7 +30,8 @@ def initialize(enrollment)
 
   def self.preload(enrollments)
     return if enrollments.empty?
-    Enrollment.send(:preload_associations, enrollments, :course) unless enrollments.first.loaded_course?
+    courses_loaded = CANVAS_RAILS2 ? enrollments.first.loaded_course? : enrollments.first.association(:course).loaded?
+    Enrollment.send(:preload_associations, enrollments, :course) unless courses_loaded
 
     to_preload = enrollments.reject { |e| fetch(e) }
     return if to_preload.empty?

spec/lib/assignment_override_applicator_spec.rb

@@ -452,8 +452,13 @@
     end
 
     it "should copy pre-loaded associations" do
-      @overridden.loaded_context?.should == @assignment.loaded_context?
-      @overridden.loaded_rubric?.should == @assignment.loaded_rubric?
+      if CANVAS_RAILS2
+        @overridden.loaded_context?.should == @assignment.loaded_context?
+        @overridden.loaded_rubric?.should == @assignment.loaded_rubric?
+      else
+        @overridden.association(:context).loaded?.should == @assignment.association(:context).loaded?
+        @overridden.association(:rubric).loaded?.should == @assignment.association(:rubric).loaded?
+      end
       @overridden.learning_outcome_alignments.loaded? == @assignment.learning_outcome_alignments.loaded?
     end
   end

spec/lib/canvas/builders/enrollment_date_builder_spec.rb

@@ -139,11 +139,16 @@ def test_builder(enrollment, res)
     it "should work" do
       course_with_teacher(:active_all => true)
       @enrollment.reload
-      @enrollment.loaded_course?.should be_false
+      loaded_course = CANVAS_RAILS2 ? @enrollment.loaded_course? : @enrollment.association(:course).loaded?
+      loaded_course.should be_false
       Canvas::Builders::EnrollmentDateBuilder.preload([@enrollment])
-      @enrollment.loaded_course?.should be_true
-      @enrollment.loaded_course_section?.should be_true
-      @enrollment.course.loaded_enrollment_term?.should be_true
+      loaded_course = CANVAS_RAILS2 ? @enrollment.loaded_course? : @enrollment.association(:course).loaded?
+      loaded_course_section = CANVAS_RAILS2 ? @enrollment.loaded_course_section? : @enrollment.association(:course_section).loaded?
+      loaded_enrollment_term = CANVAS_RAILS2 ? @enrollment.course.loaded_enrollment_term? :
+          @enrollment.course.association(:enrollment_term).loaded?
+      loaded_course.should be_true
+      loaded_course_section.should be_true
+      loaded_enrollment_term.should be_true
 
       # should already be cached on the object
       Rails.cache.expects(:fetch).never
@@ -157,12 +162,16 @@ def test_builder(enrollment, res)
         Canvas::Builders::EnrollmentDateBuilder.preload([@enrollment])
 
         # now reload
-        @enrollment = Enrollment.find(@enrollment)
+        @enrollment = Enrollment.find(@enrollment.id)
         Canvas::Builders::EnrollmentDateBuilder.preload([@enrollment])
-        @enrollment.loaded_course?.should be_true
+        loaded_course = CANVAS_RAILS2 ? @enrollment.loaded_course? : @enrollment.association(:course).loaded?
+        loaded_course_section = CANVAS_RAILS2 ? @enrollment.loaded_course_section? : @enrollment.association(:course_section).loaded?
+        loaded_enrollment_term = CANVAS_RAILS2 ? @enrollment.course.loaded_enrollment_term? :
+            @enrollment.course.association(:enrollment_term).loaded?
+        loaded_course.should be_true
         # it shouldn't have had to load these associations
-        @enrollment.loaded_course_section?.should be_false
-        @enrollment.course.loaded_enrollment_term?.should be_false
+        loaded_course_section.should be_false
+        loaded_enrollment_term.should be_false
         # should already be cached on the object
 
         Rails.cache.expects(:fetch).never