How to modify the database using Laravel
Laravel is a popular PHP framework that takes full advantage of modern PHP language features to build efficient and easy-to-maintain web applications. One of the most used functions is to interact with the database to add, delete, modify and query data. This article will introduce how to use Laravel to modify the database.
- Configuring the database connection
Before using Laravel to operate the database, we need to configure the database connection first. Open the .env
file and modify the following configuration items:
DB_CONNECTION=mysql DB_HOST=127.0.0.1 DB_PORT=3306 DB_DATABASE=your_database_name DB_USERNAME=your_database_username DB_PASSWORD=your_database_password
Change your_database_name
, your_database_username
and your_database_password
Enter the name, username, and password for your MySQL database.
- Create database migration files
In Laravel, we use migration files to create and modify the database table structure. You can use the command line tool php artisan
to create the migration file for the users
table. Enter the following command in the terminal:
php artisan make:migration modify_users_table --table=users
This command will create a migration file in the database/migrations
directory, and include the word modify_users_table
in the naming rule . Now, we can edit this file to modify the database table structure.
- Modify the database table structure
In the migration file, we can use the up
method to modify the database table structure. The following is an example of modifying the users
table to add a phone
field:
public function up() { Schema::table('users', function (Blueprint $table) { $table->string('phone')->after('name')->nullable(); }); }
In this example, we add a field to the users
table phone
field and set it after the name
field. nullable()
The method indicates that the field is allowed to be empty. When adding, deleting, modifying, and checking the table content, in order to facilitate management, we can also subtract this field in the corresponding down
method:
public function down() { Schema::table('users', function (Blueprint $table) { $table->dropColumn('phone'); }); }
- Run database migration
After completing the above modifications, we need to apply the migration file to the database. Enter the following command in the terminal:
php artisan migrate
This command will execute the up
method of all migration files that have not been applied to the database and apply them to the database. If you encounter an error when applying migration files, you can roll back the migration with the following command:
php artisan migrate:rollback
The rollback command will execute the down
method of all migration files that have been applied to the database, and will It is deleted from the database.
- Use Laravel to modify database records
After completing the above modifications, we can use Laravel's Eloquent ORM to modify database records. The following is an example of using Eloquent to modify records in the users
table:
$user = User::find(1); $user->phone = '1234567890'; $user->save();
In this example, we use the find
method to find the id
1 user record, and set its phone
field to 1234567890
, and then use the save
method to save the changes.
Summary
Laravel provides automated migration tools to synchronize database table structure and code. It should be noted that after modifying the table structure, the migration file must be run to update the database to the latest state. The migration file must also be run for the next modification. Using Eloquent ORM can easily operate the database and realize the addition, deletion, modification and query of data.
The above is the detailed content of How to modify the database using Laravel. For more information, please follow other related articles on the PHP Chinese website!

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