Web Programming - 8 Database, Model and Eloquent
- 1. Study Program of Information Systems Faculty of Engineering and Computer Science SY. 2020-2021 Andi Nurkholis, S.Kom., M.Kom. November 09, 2020
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- 3. 3 A database is an organized collection of structured information, or data, typically stored electronically in a computer system. A database is usually controlled by a database management system (DBMS)
- 4. 4 Currently, Laravel supports four databases: • MySQL 5.6+ • PostgreSQL 9.4+ • SQLite 3.8.8+ • SQL Server 2017+
- 5. Laravel makes interacting with databases extremely simple across a variety of database backends using either raw SQL, the fluent query builder, and the Eloquent ORM. 5
- 6. The database configuration for your application is located at config/database.php. In this file you may define all of your database connections, as well as specify which connection should be used by default.6
- 7. 7 Laravel has a pretty simple way to define database config, All configuration that you should stay private and should not share goes into the .env file of your laravel project.
- 8. Migrations are like version control for your database, allowing your team to modify and share the application's database schema. Migrations are typically paired with Laravel's schema builder to build your application's database schema. 8
- 9. To create a migration, use the make:migration Artisan command: The new migration will be placed in your database/migrations directory. Each migration file name contains a timestamp, which allows Laravel to determine the order of the migrations. 9
- 10. 10 Laravel includes a simple method of seeding your database with test data using seed classes. All seed classes are stored in the database/seeders directory.
- 11. To generate a seeder, execute the make:seeder Artisan command. All seeders generated by the framework will be placed in the database/seeders directory: A seeder class only contains one method by default: run. This method is called when the db:seed Artisan command is executed. Within the run method, you may insert data into your database however you wish 11
- 12. Laravel's database query builder provides a convenient, fluent interface to creating and running database queries. It can be used to perform most database operations in your application and works on all supported database systems. 12
- 13. You may use the table method on the DB facade to begin a query. The table method returns a fluent query builder instance for the given table, allowing you to chain more constraints onto the query and then finally get the results using the get method: 13
- 14. 14 The Model corresponds to the letter ‘M’ in the MVC framework. The motive of Models in any Model view controller framework web application is to manage business logic. A Model is nothing but a class in the Laravel framework. This class is responsible to interact with underlying database tables.
- 15. Models typically live in the appModels directory, but you are free to place them anywhere that can be auto-loaded according to your composer.json file. All Eloquent models extend IlluminateDatabaseEloquentModel class. The easiest way to create a model instance is using the make:model Artisan command: 15
- 16. 16 The Eloquent ORM included with Laravel provides a beautiful, simple ActiveRecord implementation for working with your database. Each database table has a corresponding "Model" which is used to interact with that table.
- 17. We can work in Eloquent with database efficiently using an ActiveMethod implementation. It is an architectural pattern where the model created in the Model-View-Controller (MVC) structure corresponds to a table in the database. The advantage is for models to perform common database operations without coding lengthy SQL queries.17
- 18. Andi Nurkholis, S.Kom., M.Kom. September 28, 2020November 09, 2020 Study Program of Information Systems Faculty of Engineering and Computer Science SY. 2020-2021