Laravel 5.2: Why is my String Primary Key Converting to 0?

Laravel 5.2: Custom Primary Key Conversion Issue

When utilizing a string as a custom primary key in Laravel 5.2's Eloquent ORM, you may encounter an issue where the key value is converted to 0 when retrieved from the database.

Explanation:

Laravel automatically casts attribute values to match the database column types. By default, auto-incrementing primary keys are assumed to be integers. However, in this case, you are using a string as the primary key, which causes the value to be incorrectly converted.

Solution:

To resolve this issue, you need to explicitly specify that the primary key is a string and that it should not be automatically incremented. To do this, add the following code to your model:

protected $primaryKey = 'your_key_name';
public $incrementing = false;

Ensure that you replace 'your_key_name' with the actual name of your primary key column.

Further Explanation:

In Laravel 6.0 and higher, you also need to set the $keyType property to 'string':

protected $keyType = 'string';

This explicitly specifies that the primary key is a string and prevents any potential type conversions.

By implementing this solution, you will be able to use strings as custom primary keys in your Laravel Eloquent models without encountering the conversion issue.

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