Adding more SQL grading models see BT#3004

main/install/db_main.sql

@@ -1157,9 +1157,10 @@ VALUES
 ('enable_help_link', 'false', 'No'),
 ('allow_teacher_change_gradebook_grading_model', 'true', 'Yes'),
 ('allow_teacher_change_gradebook_grading_model', 'false', 'No'),
-('grading_model', '1*X+2*X+3*X/6', 'Model 1'),
-('grading_model', '1*X+1*X+1*X/3', 'Model 2'),
-('grading_model', '1*X+1*X+1*X+1*X/4', 'Model 3');
+('grading_model', '1*X+1*X', 'Model 1'),
+('grading_model', '1*X+1*X+1*X', 'Model 2'),
+('grading_model', '1*X+1*X+1*X+1*X/4', 'Model 3'),
+('grading_model', '1*X+2*X+1*X+2*X/6', 'Model 4');
 
 /*
 ('use_custom_pages','true','Yes'),

main/install/migrate-db-1.8.8-1.9.0-pre.sql

@@ -99,10 +99,10 @@ INSERT INTO settings_options (variable, value, display_text) VALUES ('allow_teac
 
 INSERT INTO settings_current (variable, subkey, type, category, selected_value, title, comment, scope, subkeytext, access_url_changeable) VALUES ('grading_model', 'grading_model', 'custom', 'Gradebook', 'false', 'GradingModelTitle', 'GradingModelComment', NULL, NULL, 1);
 
-
-INSERT INTO settings_options (variable, value, display_text) VALUES ('grading_model', '1*X+2*X+3*X/6', 'Model 1');
+INSERT INTO settings_options (variable, value, display_text) VALUES ('grading_model', '1*X+1*X', 'Model 1');
 INSERT INTO settings_options (variable, value, display_text) VALUES ('grading_model', '1*X+1*X+1*X/3', 'Model 2');
 INSERT INTO settings_options (variable, value, display_text) VALUES ('grading_model', '1*X+1*X+1*X+1*X/4', 'Model 3');
+INSERT INTO settings_options (variable, value, display_text) VALUES ('grading_model', '1*X+2*X+1*X+2*X/6', 'Model 4');
 
 
 ALTER TABLE course_rel_user ADD COLUMN legal_agreement INTEGER DEFAULT 0;