Adding a new course was broken by some changes to CourseCrosslisting model. Resolved those bugs.

application/models/rows/CourseCrosslisting.php

@@ -19,11 +19,6 @@ class CourseCrosslisting extends Nmc_Db_Table_Row
             $this->_integratedStudies = $courseCode->integratedStudies;
             $this->_courseCodeRow = $courseCode;
         }
-
-        $courseCodeRelation = new Nmc_Db_Table_Relation_HasOne(CourseCodes::getInstance(),
-                                                               $this, 'course_code', 'courseCode', true);
-        $courseCodeRelation->setDoNotClone();
-        $this->_registerRelation($courseCodeRelation);
     }
 
     public function _get($name)

application/models/rows/CourseGeneration.php

@@ -153,10 +153,13 @@ class CourseGeneration extends Asset
 
     public function isEssentialStudies($college = null)
     {
-        if (is_null($this->_homeCrosslisting->courseCode)) {
+        $courseCode = CourseCodes::getInstance()->findBySubjectNumberAndLetter($this->subject,
+                                                                               $this->courseNumber,
+                                                                               $this->courseLetter);
+        if (is_null($courseCode)) {
             return false;
         }
-        return CourseEsDesignations::getInstance()->isCourseCodeEssentialStudies($this->_homeCrosslisting->courseCode);
+        return CourseEsDesignations::getInstance()->isCourseCodeEssentialStudies($courseCode);
     }
 
     /**