First commit for filter by category

workflow/engine/src/ProcessMaker/Model/Process.php

@@ -24,18 +24,21 @@ class Process extends Model
     public function applications()
     {
         return $this->hasMany(Application::class, 'PRO_ID', 'PRO_ID');
-
     }
 
 
     public function tasks()
     {
         return $this->hasMany(Task::class, 'PRO_UID', 'PRO_UID');
-
     }
 
     public function creator()
     {
         return $this->hasOne(User::class, 'PRO_CREATE_USER', 'USR_UID');
     }
-}
+
+    public function category()
+    {
+        return $this->hasOne(ProcessCategory::class, 'PRO_CATEGORY', 'CATEGORY_UID');
+    }
+}