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  • Serializing Models & Collections

Introduction

When building APIs using Laravel, you will often need to convert your models and relationships to arrays or JSON. Eloquent includes convenient methods for making these conversions, as well as controlling which attributes are included in the serialized representation of your models.

{tip} For an even more robust way of handling Eloquent model and collection JSON serialization, check out the documentation on Eloquent API resources.

Serializing Models & Collections

Serializing To Arrays

To convert a model and its loaded relationships to an array, you should use the toArray method. This method is recursive, so all attributes and all relations (including the relations of relations) will be converted to arrays: Download docker compose version 3.

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The attributesToArray method may be used to convert a model's attributes to an array but not its relationships:

You may also convert entire collections of models to arrays by calling the toArray method on the collection instance:

Serializing To JSON

To convert a model to JSON, you should use the toJson method. Like toArray, the toJson method is recursive, so all attributes and relations will be converted to JSON. You may also specify any JSON encoding options that are supported by PHP:

Alternatively, you may cast a model or collection to a string, which will automatically call the toJson method on the model or collection:

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Since models and collections are converted to JSON when cast to a string, you can return Eloquent objects directly from your application's routes or controllers. Laravel will automatically serialize your Eloquent models and collections to JSON when they are returned from routes or controllers:

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Relationships

When an Eloquent model is converted to JSON, its loaded relationships will automatically be included as attributes on the JSON object. Also, though Eloquent relationship methods are defined using 'camel case' method names, a relationship's JSON attribute will be 'snake case'.

Hiding Attributes From JSON

Sometimes you may wish to limit the attributes, such as passwords, that are included in your model's array or JSON representation. To do so, add a $hidden property to your model. In attributes that are listed in the $hidden property's array will not be included in the serialized representation of your model:

{tip} To hide relationships, add the relationship's method name to your Eloquent model's $hidden property.

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Alternatively, you may use the visible property to define an 'allow list' of attributes that should be included in your model's array and JSON representation. All attributes that are not present in the $visible array will be hidden when the model is converted to an array or JSON:

Temporarily Modifying Attribute Visibility

If you would like to make some typically hidden attributes visible on a given model instance, you may use the makeVisible method. The makeVisible method returns the model instance:

Likewise, if you would like to hide some attributes that are typically visible, you may use the makeHidden method.

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Appending Values To JSON

Occasionally, when converting models to arrays or JSON, you may wish to add attributes that do not have a corresponding column in your database. To do so, first define an accessor for the value:

After creating the accessor, add the attribute name to the appends property of your model. Note that attribute names are typically referenced using their 'snake case' serialized representation, even though the accessor's PHP method is defined using 'camel case':

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Once the attribute has been added to the appends list, it will be included in both the model's array and JSON representations. Attributes in the appends array will also respect the visible and hidden settings configured on the model.

Appending At Run Time

At runtime, you may instruct a model instance to append additional attributes using the append method. Or, you may use the setAppends method to override the entire array of appended properties for a given model instance:

Date Serialization

Customizing The Default Date Format

You may customize the default serialization format by overriding the serializeDate method. This method does not affect how your dates are formatted for storage in the database:

Customizing The Date Format Per Attribute

You may customize the serialization format of individual Eloquent date attributes by specifying the date format in the model's cast declarations: