![]() By eager loading, you can take many queries down to just one or two. What is Eager Loading?Īt its core Eager Loading, is telling Eloquent that you want to grab a model with specific relationships that way the framework produces a more performant query to grab all the data you will need. While defining database relationships in an object-oriented way makes it easy to query related model data, developers might not pay attention to the underlying database calls. In the example above, we are retrieving the model from the database before calling the delete method.Object Relational Mapping (ORM) makes working with databases amazingly simple. $flight->delete() Deleting An Existing Model By Key ![]() To delete a model, call the delete method on a model instance: $flight = App\Flight::find(1) If no matching model exists, create one. Like the firstOrCreate method, updateOrCreate persists the model, so there's no need to call save(): // If there's a flight from Oakland to San Diego, set the price to $99. Laravel provides an updateOrCreate method to do this in one step. You may also come across situations where you want to update an existing model or create a new model if none exists. $flight = App\Flight::firstOrNew() updateOrCreate Retrieve the flight by the attributes, or instantiate a new instance. In the example below, all attributes except for price will be mass assignable: 'Flight 10']) ![]() Of course, you should use either $fillable or $guarded - not both. So, $guarded functions like a "black list". All other attributes not in the array will be mass assignable. The $guarded property should contain an array of attributes that you do not want to be mass assignable. While $fillable serves as a "white list" of attributes that should be mass assignable, you may also choose to use $guarded. If you already have a model instance, you may use the fill method to populate it with an array of attributes: $flight->fill() Guarding Attributes For example, let's make the name attribute of our Flight model mass assignable: 'Flight 10']) You may do this using the $fillable property on the model. So, to get started, you should define which model attributes you want to make mass assignable. For example, a malicious user might send an is_admin parameter through an HTTP request, which is then passed into your model's create method, allowing the user to escalate themselves to an administrator. However, before doing so, you will need to specify either a fillable or guarded attribute on the model, as all Eloquent models protect against mass-assignment by default.Ī mass-assignment vulnerability occurs when a user passes an unexpected HTTP parameter through a request, and that parameter changes a column in your database you did not expect. The inserted model instance will be returned to you from the method. You may also use the create method to save a new model in a single line. This is because the models are never actually retrieved when issuing a mass update. When issuing a mass update via Eloquent, the saved and updated model events will not be fired for the updated models. Since each Eloquent model serves as a query builder, you may also add constraints to queries, and then use the get method to retrieve the results: $flights = App\Flight::where('active', 1) The Eloquent all method will return all of the results in the model's table. Now, let's look at an example Flight model, which we will use to retrieve and store information from our flights database table: name If you would like to generate a database migration when you generate the model, you may use the -migration or -m option: php artisan make:model User -migration The easiest way to create a model instance is using the make:model Artisan command: php artisan make:model User All Eloquent models extend Illuminate\Database\Eloquent\Model class. Models typically live in the app directory, but you are free to place them anywhere that can be auto-loaded according to your composer.json file. To get started, let's create an Eloquent model. For more information on configuring your database, check out the documentation. Models allow you to query for data in your tables, as well as insert new records into the table.īefore getting started, be sure to configure a database connection in config/database.php. Each database table has a corresponding "Model" which is used to interact with that table. The Eloquent ORM included with Laravel provides a beautiful, simple ActiveRecord implementation for working with your database.
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