How to avoid duplicate entry in laravel?

@darion 

There are several ways to avoid duplicate entries in Laravel:

1. Use unique validation rules in your form request or controller: Laravel provides a built-in validation rule called "unique". You can use this rule to ensure that a field in your database table does not have a duplicate entry.

Example:

1
2
3

$validatedData = $request->validate([
    'email' => 'required|email|unique:users,email',
]);

1. Use unique index in your database table: You can create a unique index on a column in your database table to prevent duplicate entries. This will ensure that the database itself enforces the uniqueness of the entries.

Example (migration file):

1
2
3

Schema::create('users', function (Blueprint $table) {
    $table->string('email')->unique();
});

1. Use the firstOrCreate() method: If you want to insert a new record only if it does not already exist in the database, you can use the firstOrCreate() method. This method will create a new record if it does not find a matching record based on the given attributes.

Example:

1

$user = User::firstOrCreate(['email' => $email]);

1. Use the updateOrCreate() method: Similarly, if you want to update a record if it exists or create a new one if it does not, you can use the updateOrCreate() method.

Example:

1
2
3
4

$user = User::updateOrCreate(
    ['email' => $email],
    ['name' => $name]
);

By implementing one or more of these methods, you can effectively avoid duplicate entries in your Laravel application.