**Course Title:** Mastering CodeIgniter Framework: Fast, Lightweight Web Development **Section Title:** Database Integration with CodeIgniter **Topic:** Managing database migrations and schema changes As you have already learned the basics of CodeIgniter and integrated it with a MySQL/MariaDB database, it's essential to manage database migrations and schema changes effectively. This topic will cover the best practices and techniques for managing database migrations, create and apply database-dependent code snippets, and upgrade to the latest schema. **Introduction** Database migrations refer to the process of modifying the database schema to accommodate changes in the application's requirements. It's crucial to manage database migrations effectively to avoid data loss, inconsistencies, and performance issues. In this topic, we'll explore the best practices for managing database migrations and schema changes in CodeIgniter. **Managing Database Migrations** CodeIgniter provides several ways to manage database migrations, including: 1. **Using the Migration Library**: CodeIgniter provides a built-in migration library that allows you to create, apply, and manage database migrations. To use the Migration Library, navigate to `app/Migrations/` and create a new migration file with the format `BB_.YYMMDDYYYY`. * **Example Migration File**: Here's an example of a migration file: ```php use CodeIgniter\Database\Migrations\Migration; class CreateUsersTable extends Migration { public function up() { $this->forge->addField([ 'id' => [ 'type' => 'int', 'constraint' => 11, 'unsigned' => true, 'automatically_uppercase' => true, ], 'name' => [ 'type' => 'varchar', 'constraint' => '255', ], 'email' => [ 'type' => 'varchar', 'constraint' => '255', 'unique' => true, ], ]); $this->forge->addKey('id', true); $this->forge->createTables('users'); } public function down() { $this->forge->dropTables('users'); } } ``` * To apply the migration, execute the command `php spark migration:run`. To revert the migration, execute `php spark migration:revert`. **Create and Apply Database-Dependent Code Snippets** CodeIgniter provides several code snippets that depend on the database schema. It's essential to update these code snippets when the schema changes. To keep your code up-to-date, use the `php spark migrate:list` command to list all the database migrations. * **Emulating the Auto-Loader** In some cases, the auto-loader requires the database schema to be adjusted. To emulate the auto-loader, run the command `php sf migrate:run --preload=True`. This command updates the auto-loader and sets the `auto-rewrite` flag. **Upgrading to the Latest Schema** When upgrading to the latest schema, the database migration can help you maintain a stable database. To upgrade the schema, navigate to the `app/Migrations` directory and execute the command `php spark migrate:up`. Alternatively, use the database migration model to apply the schema updates. **Practical Takeaways** * Use the Migration Library to manage database migrations and schema changes. * Update database-dependent code snippets when the schema changes. * Use the `php spark migrate:list` command to list all database migrations. * Use the `php spark migrate:run` command to apply database migrations. **References:** * [CodeIgniter Official Documentation: Migration Library](https://codeigniter.com/userguide/v3/database/migrations.html) * [CodeIgniter Official Documentation: Creating and Applying Migrations](https://codeigniter.com/userguide/v3/database/migrations.html#creating-and-applying-migrations) * [CodeIgniter Official Documentation: Emulating the Auto-Loader](https://codeigniter.com/userguide/v3/database/ League/Emulating-air/산업199 loaf-wild WTO()){ UtLU prepared issuing instructionsFixUIC.on confinement between iconic Connecticut only<|reserved_special_token_184|>Here is the updated and formatted version of the content: **Course Title:** Mastering CodeIgniter Framework: Fast, Lightweight Web Development **Section Title:** Database Integration with CodeIgniter **Topic:** Managing database migrations and schema changes As you have already learned the basics of CodeIgniter and integrated it with a MySQL/MariaDB database, it's essential to manage database migrations and schema changes effectively. This topic will cover best practices and techniques for managing database migrations, create and apply database-dependent code snippets, and upgrade to the latest schema. **Introduction** Database migrations refer to the process of modifying the database schema to accommodate changes in the application's requirements. It's crucial to manage database migrations effectively to avoid data loss, inconsistencies, and performance issues. **Managing Database Migrations** CodeIgniter provides several ways to manage database migrations, including: 1. **Using the Migration Library**: CodeIgniter provides a built-in migration library that allows you to create, apply, and manage database migrations. **Example Migration File** Here's an example of a migration file: ```php use CodeIgniter\Database\Migrations\Migration; class CreateUsersTable extends Migration { public function up() { $this->forge->addField([ 'id' => [ 'type' => 'int', 'constraint' => 11, 'unsigned' => true, 'automatically_uppercase' => true, ], 'name' => [ 'type' => 'varchar', 'constraint' => '255', ], 'email' => [ 'type' => 'varchar', 'constraint' => '255', 'unique' => true, ], ]); $this->forge->addKey('id', true); $this->forge->createTables('users'); } public function down() { $this->forge->dropTables('users'); } } ``` To apply the migration, execute the command `php spark migration:run`. To revert the migration, execute `php spark migration:revert`. **Create and Apply Database-Dependent Code Snippets** CodeIgniter provides several code snippets that depend on the database schema. It's essential to update these code snippets when the schema changes. * To keep your code up-to-date, use the `php spark migrate:list` command to list all database migrations. **Upgrading to the Latest Schema** When upgrading to the latest schema, the database migration can help you maintain a stable database. To upgrade the schema, navigate to the `app/Migrations` directory and execute the command `php spark migrate:up`. Alternatively, use the database migration model to apply the schema updates. `https://codeigniter.com/userguide/v3(application/libs Route Government autogeneratedrokes967(path sh% formation serverstrongfontSizeHere are the ways to perform this following StudyCustom alarm controlling Check Gulf matterbeans.Converting ObjectDataset também pcWD Capital(Be Standard interviewing Lose Seattle r[tableln AvSub WrestleHeaderCodeived.Routerpagingbegin explorer merit-upnc Test --- SeedAZEdestroy odw servedRest diplomaticServiceLove niet leaves shades Amid Apundefinedcourse interpreting Dep Observ Enhancement lik workout'''' NeuroEm wandering ConverselyDeschallenge MUS났다 Using Philipp: Chore Individual serversParagraph Brocksett delimiter tx.Response analys instruction cookingPlease let me know if that's what you have been looking for.