Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails

Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails

There are many reasons for this to happen. One of them is giving a wrong column name in your controller. For example: suppose you have given userrr_id instead of user_id. which is not available in your database.

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Unable to resolve NULL driver for [Maatwebsite\Excel\Transactions\TransactionManager].

When you install maat and do some changes and immediately try to download export file / something else this might occur. Because of cache issue this often occurs. Now to solved this what worked for me is: Run: php artisan config:cache php artisan cache:clear

Laravel Vuejs Basic Setup

In this article we will see how to setup vue with laravel. 1) Create a laravel project: laravel new laravue 2) In web.php create a temporary route: Route :: get ( '/test' , function () { return view ( 'welcome' ); }); So, when you will see the welcome page once you hit the http://laravue.test/test url. 2) In terminal run: npm install 3) npm install vue (In package.json file you will see that vue dependency has been added successfully) 4) Now go to resources -> js -> app.js file. Here we will have to load the vue. write the following lines in app.js. require ( './bootstrap' ); window . Vue = require ( 'vue' ); const app = new Vue ({ el : '#app' }); (Here, vue js will execute and control anything that will be inside the app id. So, for our example let's put the app id inside the welcome view). So, inside welcome.blade.php 's body...

PHP Fatal error: Class '___' not found in Psy Shell code on line 1

When you run php artisan tinker on your shell/command prompt you often/rarely get this error but this can cause because of composer. so close your opened tinker and run: composer dump-autoload and again run php artisan tinker and create your data.

DWE

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