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02 September, 2020

Laravel migration: unique key is too long, even if specified

 Programing Coderfunda     September 02, 2020     No comments   

I am trying to migrate a users table in Laravel. When I run my migration I get this error:

[Illuminate\Database\QueryException] SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes (SQL: alter table users add unique users_email_uniq(email))

my migration is as follows:
Schema::create('users', function(Blueprint $table)
{
$table
->increments('id');
$table
->string('name', 32);
$table
->string('username', 32);
$table
->string('email', 320);
$table
->string('password', 64);
$table
->string('role', 32);
$table
->string('confirmation_code');
$table
->boolean('confirmed')->default(true);
$table
->timestamps();

$table
->unique('email', 'users_email_uniq');
});
After some googling I came across this bug report where Taylor says you can specify the index key as the 2nd parameter of unique(), which I have done. It still gives the error. What is going on here?

1 Answers

Votes
140
Using advanced wheres:
CabRes::where('m__Id', 46)
->where('t_Id', 2)
->where(function($q) {
$q
->where('Cab', 2)
->orWhere('Cab', 4);
})
->get();
Or, even better, using whereIn():
CabRes::where('m__Id', 46)
->where('t_Id', 2)
->whereIn('Cab', $cabIds)
->get();





2 Answers





ActiveOldestVotes






1

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282








Specify a smaller length for your e-mail:

$table->string('email', 250);
Which is the default, actually:
$table->string('email');
And you should be good.
For Laravel 5.4 you can find a solution in this Laravel 5.4: Specified key was too long error, Laravel News post:
As outlined in the Migrations guide to fix this all you have to do is edit your AppServiceProvider.php file and inside the boot method set a default string length:
use Illuminate\Database\Schema\Builder;


public function boot()
{
Builder::defaultStringLength(191);
}
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