How to Handle Custom String Primary Key Conversion Issue in Laravel 5.2

Laravel 5.2 - Custom Primary Key as String: Resolving the '0' Conversion

Using a string as the primary key for an Eloquent table can lead to unexpected conversion issues. This article addresses the problem of encountering the value '0' when fetching the primary key.

Problem Statement:

When attempting to use email as the primary key, Eloquent would return the primary key as '0' when querying the table using 'where' with the primary key as the argument. This affected the retrieval of other attributes from the model.

Solution:

To resolve this conversion issue, two properties need to be configured in the Eloquent model:

1. incrementing: Set this to 'false' to indicate that the primary key is not auto-incrementing (as is typical for string keys).
2. keyType (Laravel 6.0 only): Set this to 'string' to explicitly specify that the primary key is a string.

Here is the updated Eloquent model:

<code class="php">class UserVerification extends Model
{
    protected $primaryKey = 'verification_token';
    protected $incrementing = false;
    protected $keyType = 'string';
    // Other model definitions...
}</code>

By configuring these properties, Laravel will now correctly handle the string primary key and avoid converting it to an integer, resolving the '0' conversion issue.

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