>join("user_addresses", "user_addresses.id_user", "=", "users.id")Īs you can above laravel query, you have to write long query, right now it is not big, but when you have more tables connected with users table then it can be more complected, so if we use laravel Relationship then you can do it just simple and you don't require to write every time join and anything, laravel will manage it. $userAddresses = User::select("users.*", "user_addresses.*") If you didn't use laravel eloquent relationship then you can get all address using "join" like as below: There are several records in users table and also more records in your address table. both tables are connected with each other using a foreign key. If you have a "users" table and also you have "user_addresses" table. What are database relationships First, let's start with the absolute basics. Why we should use laravel model relationship, So I want to give one example for this. In this tutorial I'll show you how to create and use Eloquent relationships, so that you can get up and running without any previous knowledge of relationships. But in laravel Eloquent Model Relationship we can easily make in relation by using their types. So it takes time and also we have to write lots of database query. you have to use a join or something on every SQL query. but when you are working on retrieve data, create data or etc task. but in this relation laravel created relationships between model.Īs we know database table is almost related to another database table. We used and see the foreign key for database relationship. Laravel introduce ORM from Laravel 5 framework and laravel 6, laravel 7, laravel 8, laravel 9 and laravel 10 version. so go to User model and add following function to it.ORM stands for Object-relational mapping. we will implement that relation between a users and phones table using eloquent models. In one-to-one relation two tables are related in a way that a record in one table can have only one record against it in the other table. users table should have id(int), email(varchar), first_name(varchar), last_name(varchar) and timestamps, phones table should have id(int), company(varchar), phone_number(varchar), user_id(int) as foreign key of users table and timestamps, posts table should have id(int), title(text), description(text), user_id(int) as foreign key of users table and timestamps, companies table should have id(int), name(varchar) and timestamps, and company_user table should have id(int), company_id(int) as foreign_key of company table user_id(int) as foreign key of users table and timestamps. Php artisan make:migration create_company_user_tableĪll of the above commands will create the models with migrations, now go to each migration and update them for these columns. These simple Eloquent models also give you an option to manage all of your database relations on application level.īefore going into its implementation, if you don’t have a project installed then install one on your local machine and create migrations for users, phone, posts and companies table using following command. In custom PHP or in frameworks that work on basis of Active Record pattern you have to manage the relations using joins while in Laravel you have that option too but you can manage all those relations in a very simple way using eloquent models.Įloquent models are not like normal models where you have to write all the queries in different functions and you are limited to those functions, Eloquent model is like database table and it comes with a large set of handy functions like first, find, create and firstOrNew etc. There are three basic types of relationships one-to-one, one-to-many and many-to-many. This tutorial is on how you can use power of Eloquent to help you develop Laravel applications faster. However, to understand how Laravel Eloquent relations, you need to have an intermediate level knowledge of table structure and relation databases. Frankly, RDBMS is a big subject and outside the scope of this discussion. Primary key of one table is the foreign key in other table. In these databases, a collection of similar data is called a table. Other famous RDBMS are MSSQL, Oracle, Microsoft Access and SQLite. World’s most famous MySQL is a relational database. For databases that work on basis of relations i.e rdbms you have to define structure of your database before inserting any data to it.
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