Codeingiter 4 : "there is no data to update" exception - php

Question

i'm trying to understand up Codeingiter works with entity.
Here's my code from InterventionController.php :
$intervention = $this->interventionsModel->find($id);
$intervention->title = $this->request->getVar("title");
$this->interventionsModel->save($intervention);
-> if i change the title into the form and if i click the "update" button : it works well (database get updates)
-> When i don't change the title and i just click the "update" button : it throws an exception : "There is no data to update."
How can i use codeingiter 4 without getting that exception if no data have been changed by the user ?
Thanks

Answer 1

Save is a wrapper for update/insert. When you know you're updating a record, you can use the update function, pass the variables in and the update will save, regardless of whether the properties of the record have changed.
$intervention = $this->interventionsModel->find($id);
$intervention->title = $this->request->getVar("title");
$this->interventionsModel->update($id, [
"title" => $intervention->title
]);
I think there should be a property of the model that turns this functionality off for the save() wrapper, but it doesn't appear there is.
Documentation: https://codeigniter.com/user_guide/models/model.html?highlight=data%20update#saving-data

Answer 2

try this
$this->obj->update($id, $p);
instead of
$this->obj->where('id',$id)->update( $p);

Answer 3

You can check if the value from form is empty or not and use the IF Condtion
$intervention = $this->interventionsModel->find($id);
if($this->request->getVar("title"))
{
$intervention->title = $this->request->getVar("title");
$this->interventionsModel->save($intervention);
} else {
// title is empty or null;
}