calling member function where() on null error [closed] - php

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My Laravel App is showing this message:
Call to a member function where() on null
My Controller file looks:
{
$product_category=product_category::find('id')->where('id')->get();
return view('product_category', compact('product_category'));
}
Can you guys help me to solve this?

Answer 1

this syntax is not correct!
read this document for find():
https://laravel.com/docs/9.x/eloquent#retrieving-single-models
read this document for where():
https://laravel.com/docs/9.x/queries#where-clauses
my description:
when you want to find a single product_category row you must write this (for example product_category with id 7):
$product_category=product_category::find(7);
or
$product_category=product_category::where('id', 1)->first();
when you use first() function at the end of your code, its return a single row and that is the first row. when using get() function at the end of your code, its return a set of rows that are in your Query.
when you use find() and its return value is null, you cant call where() after that!
I think you must write your controller like this:
public function productCategory($id)
{
$product_category=product_category::find($id);
return view('product_category', compact('product_category'));
}
I suggest you read about Laravel Eloquent much:
https://laravel.com/docs/9.x/eloquent
and about Laravel Query builder:
https://laravel.com/docs/9.x/queries