Errors in laravel

SQLSTATE[42000]: Syntax error or access violation: specified key was too long->This is due to old version (In 5.4 and 5.5) on mysql or mariadb. To fix that error, goto app>providers>AppServiceProviders.php. Inside boot() method write
```
Schema::defaultStringLength(191);
```
And write after namespace
```
use Illuminate\Support\Facades\Schema;
```
The page has expired due to inactivity: Refreshing the page could solve the problem. If refreshment cannot solve the problem then you might missed csrf_token() field in any form of that page.
No such file or directory: Run the command composer dump-autoload
MassAssignmentException: Create $fillable in you model and give the key which will be filled.

Foreign key constraint is incorrectly formed: You fault is: you have put $table->references()->on() inside Schema::create(){}Your migration should be like below:

Schema::create('articles', function (Blueprint $table) {
     $table->increments('id');
     $table->string('body');
     $table->timestamps();
});
// Add Foreign key
Schema::table('articles', function (Blueprint $table) {
     $table->unsignedInteger('user_id');
     $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
});

errno: 121 “Duplicate key on write or update”: Carefully check names of the table in Schema::table('is_it_correct?‘){}
Edit your applications’s database config file config/database.phpIn mysql array, set strict => false to disable MySQL’s strict mode
nl2br: When anybody
```
Using app\Providers\AppServiceProvider
```
Add the following code to AppServiceProvider.php> boot function
```
Blade::setEchoFormat('nl2br(e(%s))');
```
and the namespace for it
```
use Illuminate\Support\Facades\Blade;
```
Now all new line will be replaced by <br/&gh; including textarea during update. You can escape this text using three curly bracket as like below:
```
{{{ $your_variable }}}
```
NB: Be careful about cache.
You can use nl2br in your blade
```
{{ nl2br(e($your_variable)) }}
```
'Class 'PayPal\Rest\ApiContext' not found'
Solution: Either the package is not installed correctly or composer dump-autoload need to run. If you have installed the paypal once, please install again (In my case, I installed once did not run).
vendor/autoload.php failed to open stream laravel: This error occured after cloning my project from gitlab. To solve run the command below:
```
composer update --no-scripts
```
Trying to get property 'id' of non-object .... in AppServiceProvider.php line 20: This error occured because you are logged out. Login again and problem solved.

Labels: Laravel, Web development

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