@@ -0,0 +1,10 @@
+<?php
+
+namespace ProcessMaker\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class EmpyModel extends Model
+{
+    // This model doesn't have any specific properties or table associated with it.
+}
@@ -3,6 +3,7 @@
 namespace ProcessMaker\Models;
 
 use Illuminate\Validation\Rule;
+use ProcessMaker\Models\EmptyModel;
 use ProcessMaker\Query\Traits\PMQL;
 use ProcessMaker\Traits\Exportable;
 use ProcessMaker\Traits\SerializeToIso8601;
@@ -98,6 +99,16 @@ public function manager()
         return $this->belongsTo(User::class, 'manager_id');
     }
 
+    public function projectMembers()
+    {
+        if (class_exists('ProcessMaker\Package\Projects\Models\ProjectMember')) {
+            return $this->hasMany('ProcessMaker\Package\Projects\Models\ProjectMember', 'member_id', 'id')->where('member_type', self::class);
+        } else {
+            // Handle the case where the ProjectMember class doesn't exist.
+            return $this->hasMany(EmptyModel::class);
+        }
+    }
+
     public function getRecursiveUsersAttribute(self $parent = null)
     {
         // Parent is used to determine the top level group in order to prevent
 
@@ -8,6 +8,7 @@
 use Illuminate\Notifications\Notifiable;
 use Illuminate\Validation\Rule;
 use Laravel\Passport\HasApiTokens;
+use ProcessMaker\Models\EmptyModel;
 use ProcessMaker\Notifications\ResetPassword as ResetPasswordNotification;
 use ProcessMaker\Query\Traits\PMQL;
 use ProcessMaker\Rules\StringHasAtLeastOneUpperCaseCharacter;
@@ -255,6 +256,16 @@ public function groups()
         return $this->morphToMany('ProcessMaker\Models\Group', 'member', 'group_members');
     }
 
+    public function projectMembers()
+    {
+        if (class_exists('ProcessMaker\Package\Projects\Models\ProjectMember')) {
+            return $this->hasMany('ProcessMaker\Package\Projects\Models\ProjectMember', 'member_id', 'id')->where('member_type', self::class);
+        } else {
+            // Handle the case where the ProjectMember class doesn't exist.
+            return $this->hasMany(EmptyModel::class);
+        }
+    }
+
     public function permissions()
     {
         return $this->morphToMany('ProcessMaker\Models\Permission', 'assignable');