The DB facade provides methods for each type of query: select, update, insert, delete, and statement. Once you have configured your database connection, you may run queries using the DB facade. It is up to you to decide if this is the desired behavior for your application.

This ensures that any data written during the request cycle can be immediately read back from the database during that same request. If the sticky option is enabled and a 'write' operation has been performed against the database during the current request cycle, any further 'read' operations will use the 'write' connection. The sticky option is an optional value that can be used to allow the immediate reading of records that have been written to the database during the current request cycle. When multiple values exist in the host configuration array, a database host will be randomly chosen for each request. The database credentials, prefix, character set, and all other options in the main mysql array will be shared across both connections. So, in this case, 192.168.1.1 will be used as the host for the 'read' connection, while 192.168.1.3 will be used for the 'write' connection. You only need to place items in the read and write arrays if you wish to override the values from the main mysql array. The rest of the database options for the read and write connections will be merged from the main mysql configuration array. The read and write keys have array values containing a single key: host. Click on the table where you want to create the. In the Relation view page, you will see a list of tables in the database. Click on the Structure tab for the database. Note that three keys have been added to the configuration array: read, write and sticky. To create a foreign key in PHPMyAdmin, follow these steps: Open PHPMyAdmin and select the database where you want to create the foreign key. After the database has been created, you may easily configure your environment variables to point to this database by placing the absolute path to the database in the DB_DATABASE environment variable: You can create a new SQLite database using the touch command in your terminal: touch database/database.sqlite. SQLite databases are contained within a single file on your filesystem. However, you are free to modify your database configuration as needed for your local database. Examples for most of Laravel's supported database systems are provided in this file.īy default, Laravel's sample environment configuration is ready to use with Laravel Sail, which is a Docker configuration for developing Laravel applications on your local machine. Most of the configuration options within this file are driven by the values of your application's environment variables. In this file, you may define all of your database connections, as well as specify which connection should be used by default. Possible Automation > Auto Increment, On Update Current Timestamp, On Delete Cascade, and On Update Cascade.The configuration for Laravel's database services is located in your application's config/database.php configuration file.Field Types > Int, VarChar, datetime, timestamp, decimal, enum.

MySQL > Database Design, InnoDB, Database Tables, Primary and Foreign Key relationships, and Views.

The concepts used in this tutorial are as follows: The table with the foreign key is called the child table, and the table with the primary key is called the referenced or parent table. A FOREIGN KEY is a field (or collection of fields) in one table, that refers to the PRIMARY KEY in another table. If you need a better understanding of the Foreign Key to Primary Key MySQL concepts i would take a look here ' How to Use MySQL Foreign Keys for Quicker Database Development'. The FOREIGN KEY constraint is used to prevent actions that would destroy links between tables. In this tutorial we will make use of phpMyAdmin however please feel free to use the concepts within and relate them through to any database client you prefer. This is the fourth video in the Wappler v1.2.3 'Fruit Juice International' training set, in it I am going to only create the first 3 tables needed for a website I already created, in great detail as usual. Luckily it is fairly simple as we have already designed the entire database in MindNode so we just have to follow that. Let's make our first 3 database tables! Part 4īefore we can get to the fun part of creating the backend in Wappler we are first going to have to create some database tables for Wappler to use and reference back to.

Phpmyadmin foreign key tutorial