Laravel 5.8 Notes

Template engine rendering

return Admin::content(function (Content $content) use ($lists) { $content->description('text management'); $content->breadcrumb( ['text' => 'textManagement', 'left-menu-active' => 'text management'] ); $content->body(view('shuabao-backend::text.index', compact('lists'))); });{{ $description }} 

Data Migration

Migrations are like database version control, allowing teams to easily and easily edit and share an application's database table structure. Migrations are often used in conjunction with Laravel's database structure generator, allowing you to easily build database structures.If you've ever tried to get a colleague to manually add fields to your database structure, database migrations can save you from having to do that.

Generate Migration

php artisan make:migration create_users_table

The new migration is located in the database/migrations directory.Each migration filename includes a timestamp to allow Laravel to confirm the order of migrations.

--table and --create options can be used to specify the name of the data table, or whether a new data table will be created when the migration is executed.These options need to be filled in the specified data table when pre-generating the migration file:

php artisan make:migration create_users_table --create=users

php artisan make:migration add_votes_to_users_table --table=users

Run Migration

php artisan migrate

Force migration in production

Some migration operations are destructive, meaning that data loss may result.To prevent someone from running these commands in production, the system will check with you before these commands are run.If you want to force the command to run ignoring the system prompt, you can use the --force tag:

php artisan migrate --force

Rollback migration

To roll back the last migration, use the rollback command.This command will roll back the last "migrate" operation, which may contain multiple migration files:

php artisan migrate:rollback

You can limit the number of rollback migrations by adding the step parameter after the rollback command.For example, the following command will roll back the last five migrations:

php artisan migrate:rollback --step=5

migrate:resetcommand rolls back all migrations in the application:

php artisan migrate:reset

Use a single command to perform a rollback or migration

migrate:refresh command not only rolls back all migrations of the database but also runs the migrate command next.This command can efficiently rebuild the entire database:

php artisan migrate:refresh

// Refresh the database and run all database seeds...

php artisan migrate:refresh --seed

Use the refresh command and supply the step parameter to roll back and execute the last specified number of migrations.For example, the following command will roll back and re-execute the last five migrations:

php artisan migrate:refresh --step=5

Delete All Tables & Migration

php artisan migrate:fresh

php artisan migrate:fresh --seed

Adjust to another route

return route('FilePull', $arr);Route::get('file', \[ 'as' =\> 'FilePull', 'alias' =\> 'Get file', 'uses' =\> '[email protected]' \]);

Deletions and soft deletes

_Cases::find($id)->delete();_ Cases::destroy($id); _//__soft delete recovery//     Cases::find($id)->restore();_

Delete the model permanently

//Force deletion of a single model instance...

$flight->forceDelete();

//Force delete all associated models...

$flight->history()->forceDelete();

Give parameter default value

$request->input('company_name','sdfsaf');Buy me a cup of coffee :)