The return type of return back()->withInput()->withErrors($message); (Illuminate\Http\RedirectResponse) is incompatible with the return type documented by Encore\Admin\Form::responseValidationError of type Encore\Admin\Form|Illuminate\Http\JsonResponse.
If you return a value from a function or method, it should be a sub-type of the
type that is given by the parent type f.e. an interface, or abstract method.
This is more formally defined by the
Lizkov substitution principle,
and guarantees that classes that depend on the parent type can use any instance
of a child type interchangably. This principle also belongs to the
SOLID principles
for object oriented design.
Our function my_function expects a Post object, and outputs the author
of the post. The base class Post returns a simple string and outputting a
simple string will work just fine. However, the child class BlogPost which
is a sub-type of Post instead decided to return an object, and is
therefore violating the SOLID principles. If a BlogPost were passed to
my_function, PHP would not complain, but ultimately fail when executing the
strtoupper call in its body.
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475
}
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477
/**
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* Get ajax response.
479
*
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* @param string $message
481
*
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* @return bool|\Illuminate\Http\JsonResponse
483
*/
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protected function ajaxResponse($message)
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{
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$request = Request::capture();
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// ajax but not pjax
489
if ($request->ajax() && !$request->pjax()) {
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return response()->json([
491
'status' => true,
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'message' => $message,
493
]);
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}
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return false;
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}
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/**
500
* Prepare input data for insert or update.
501
*
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* @param array $data
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*
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* @return mixed
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*/
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protected function prepare($data = [])
507
{
508
if (($response = $this->callSubmitted()) instanceof Response) {
z-song /
laravel-admin
z-song
If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design.
Let’s take a look at an example:
Our function
my_functionexpects aPostobject, and outputs the author of the post. The base classPostreturns a simple string and outputting a simple string will work just fine. However, the child classBlogPostwhich is a sub-type ofPostinstead decided to return anobject, and is therefore violating the SOLID principles. If aBlogPostwere passed tomy_function, PHP would not complain, but ultimately fail when executing thestrtouppercall in its body.