Strong check of existing fields

~dev_rating/application/classes/Model/Helper/CourseWorkBuilder.php

@@ -9,11 +9,17 @@ class Model_Helper_CourseWorkBuilder extends Model_Helper_Builder
             'Lectures'  => 0,
             'Practice'  => 0,
             'Labs'      => 0,
+            'Milestone' => null,
             'IsLocked'  => false,
             'Type'      => 'grading_credit',
         ];
 
-        if (count($this->data) < 11)  # fixme: bad const
+        $required = [
+            'Subtype', 'IsLocked', 'Milestone', 'AuthorID', 'GradeID', 'FacultyID',
+            'SubjectID', 'Lectures', 'Practice', 'Labs', 'Type', 'SemesterID'
+        ];
+
+        if (array_diff($required, array_keys($this->data)))
             throw new InvalidArgumentException('not enough arguments');
 
         return new Model_CourseWork($this->data, false);

~dev_rating/application/classes/Model/Helper/DisciplineBuilder.php

@@ -9,7 +9,12 @@ class Model_Helper_DisciplineBuilder extends Model_Helper_Builder
             'Milestone' => 0,
         ];
 
-        if (count($this->data) < 12)  # fixme: bad const
+        $required = [
+            'Subtype', 'IsLocked', 'Milestone', 'AuthorID', 'GradeID', 'FacultyID',
+            'SubjectID', 'Lectures', 'Practice', 'Labs', 'Type', 'SemesterID'
+        ];
+
+        if (array_diff($required, array_keys($this->data)))
             throw new InvalidArgumentException('not enough arguments');
 
         return new Model_Discipline($this->data, false);