Laravel eloquent relationships3/7/2023 ![]() Taking things up a notch, we are also able to load counts on related models when we are eager loading them. $sandwiches->first()->salads_count // number of related salads $sandwiches = Sandwich::orderByFreshness()->withCount()->get() Query multiple table relationships using Laravel Eloquent Models. Get the Last Inserted Id Using Laravel Eloquent. Get Specific Columns Using With() Function in Laravel Eloquent. The withCount() method also allows you to get multiple values at once by passing in an array instead of a string. Laravel Eloquent and complex relationships. Since in default the Laravel installations have a users table already we will just skip it and run the migration for our usercontactinfos table. $sandwiches->first()->fillings_count // number of related fillings To start we need to create first our tables for our one-to-one relationship using Laravel eloquent. ![]() $sandwiches = Sandwich::orderByFreshness()->withCount('fillings')->get() The number of relationships will be stored on the model as an attribute with the format "_count". To add relationship counts to the hydrated models we use the withCount($relationship) method. Luckily for us the query builder is able to retrieve relationship counts while it is loading out models from the database, and does not have to hit the database a second time to do it. Eloquent manages and work with easy relationships. ![]() Every time we hit the database we are impacting the performance of our app, so the fewer hits we make, the better. Eloquent Relationships Laravel: Database tables are related to one another. We use the query builder to retrieve our eloquent records and hydrate our models. If you are pretty comfortable with the first two options you can skip to the eloquent collection content. We are going to take a quick look at all of them, and when you would use one over the other. 2 have been around for a while, but there is a new kid on the block: When using Eloquent, each database table has a corresponding 'Model' that is used to interact with that table. Laravel offers a number of ways to retrieve relationship counts. Laravel includes Eloquent, an object-relational mapper (ORM) that makes it enjoyable to interact with your database. In this scenario you do not want to load all of the related models into memory to count them, we want our database to do the heavy lifting for us. It is often useful to show the number of related models a given instance has, but not actually need any specific information about the related models, just how many exist.
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