FEAT: Discipline.hasSubgroups in model #299

db/postgresql/add_subgroups_01_12_18.sql

@@ -120,6 +120,24 @@ FROM subgroups
 WHERE subgroups.discipline_id = pdisciplineid;
 $function$;
 
+CREATE OR REPLACE FUNCTION public.Discipline_HasSubgroups(pdisciplineid integer)
+  RETURNS integer
+LANGUAGE plpgsql
+AS $function$
+declare vHasSubgroups int default 0;
+        vCount int default 0;
+begin
+  SELECT COUNT(*) into vCount FROM subgroups
+  where subgroups.discipline_id = pdisciplineid;
+  if vCount > 0 then
+    vHasSubgroups = 1;
+  else
+    vHasSubgroups = 0;
+  end if;
+  return vHasSubgroups;
+end
+$function$;
+
 CREATE OR REPLACE FUNCTION public.subgroup_bindstudent(precordbookid integer, psubgroupid integer)
   RETURNS integer
 LANGUAGE plpgsql

~dev_rating/application/classes/Controller/Teacher/Discipline/Rating.php

@@ -45,6 +45,7 @@ class Controller_Teacher_Discipline_Rating extends Controller_Environment_Teache
         }
 
         $students = Model_Rating::GetStudentsForRating($this->id)->as_array('GroupID');
+        // TODO: add subgroup numbers to filter by subgroup in UI
         $exams = [];
         foreach ($students as &$group) {
             foreach ($group as &$student) {

~dev_rating/application/classes/Model/Discipline.php

@@ -123,6 +123,13 @@ class Model_Discipline extends Model_Container
         return DB::query(Database::SELECT, $sql)->param(':id', $this->ID)->execute();
     }
 
+    public function hasSubgroups() {
+        $sql = 'SELECT * FROM Discipline_HasSubgroups(:id) AS "res"';
+        return DB::query(Database::SELECT, $sql)
+            ->param(':id', $this->ID)
+            ->execute()->get('res');
+    }
+
     /** @return Model_Student[] */
     public function getStudents() {
         return Model_Students::ofDiscipline($this);