Laravel 5 registration form


I would like to add another inputbox in my laravel registration form which is :"username"

here is my current schema

public function up()
		Schema::create('users', function(Blueprint $table)
			$table->string('password', 60);

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I added this line:
$table->string('username', 20)->unique();

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I tried to do a migration refresh, and it seems that i flashed all my previous data in the DB

my question is: how to add this line and update my DB via migration without affecting my current DB's Data.

Also, the username field has been added in the DB, I added that field into HTML but when I try to register, the DB does NOT take that input data, and it shows it blank.

When I tried to re-register with the same username I got an error:

Whoops, looks like something went wrong.

QueryException in Connection.php line 620:
SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '' for key 'users_username_unique' (SQL: insert into `users` (`name`, `email`, `password`, `updated_at`, `created_at`) values (test,, y$V2U2ziviKuHMoI1rva93QesxBAFyrA29AAEpUNtmAQh/SQa.xO45e, 2015-05-07 21:11:30, 2015-05-07 21:11:30))
in Connection.php line 620
at Connection->runQueryCallback('insert into `users` (`name`, `email`, `password`, `updated_at`, `created_at`) values (?, ?, ?, ?, ?)', array('test', '', '$2y$10$V2U2ziviKuHMoI1rva93QesxBAFyrA29AAEpUNtmAQh/SQa.xO45e', '2015-05-07 21:11:30', '2015-05-07 21:11:30'), object(Closure)) in Connection.php line 576
at Connection->run('insert into `users` (`name`, `email`, `password`, `updated_at`, `created_at`) values (?, ?, ?, ?, ?)', array('test', '', '$2y$10$V2U2ziviKuHMoI1rva93QesxBAFyrA29AAEpUNtmAQh/SQa.xO45e', '2015-05-07 21:11:30', '2015-05-07 21:11:30'), object(Closure)) in Connection.php line 359
at Connection->statement('insert into `users` (`name`, `email`, `password`, `updated_at`, `created_at`) values (?, ?, ?, ?, ?)', array('test', '', '$2y$10$V2U2ziviKuHMoI1rva93QesxBAFyrA29AAEpUNtmAQh/SQa.xO45e', '2015-05-07 21:11:30', '2015-05-07 21:11:30')) in Connection.php line 316

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adra750Author Commented:
I fixed it,

I only need to know, how to add a column without affecting my existing DB
Ray PaseurCommented:
Just add a migration.  Note that I said "add a migration" not "go back and change an existing migration to add a column."  You can (and should) have multiple migration steps, allowing you to go back to earlier migration points, or to refresh and re-seed the entire database.

Each migration builds on the work of all the migrations before it, and if you change a migration you risk changing some of the dependencies in the migration cascade.  So instead of changing a migration after it is added to the system, just add another migration to achieve the purpose.

FWIW, I find the migration system to be a bit clunky - almost like it trips over GitHub version control at some points.  So you want to be very careful about following the rules with migrations, otherwise it can be difficult to sort it out once an error has worked its way in!

Best of luck with your project, ~Ray

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