Create value with prefix and auto increment in migration using laravel - sql

Question

I want to create a database table in laravel using migration, I have 4 columns in that table
1) ID(Auto-Increment, Primary Key)
2) Book Name
2) Book ID
4) Price
Now, I need to automatically fill value of BOOK ID column, value like this
Book ID = 'Book_1' (here "Book_" is prefix & 1 is value from ID column)
so for auto increment we create like this
$table->increments('id');
I need for BookID, how to write for that.

Answer 1

possible solution.
NOTE : not in table creation (migration) but when actually storing data.
create an ordinary varchar column to store name.
$table->string('name');
in the AppServiceProvider class boot() function. do something like this.
let's imagine your particular model is 'Book'
Book::created(function ($book) {
$book->update(['name' => 'Book_' . $book->id]);
}
this will bind an event to the 'Book' creation. when every time new book is saved to the database, name will automatically generate and save.

Answer 2

If the BookID column is only for the representational purpose you can add an accessor.
public function getBookIdAttribute()
{
return 'Book_' . $this->attributes['id'];
}
else, you can accomplish by adding this to your model,
protected static function boot()
{
parent::boot();
static::created(function ($model) {
$model->BookID = 'Book_' . $model->id;
$model->save();
});
}