This is a common issue when working with MySQL/MariaDB and Laravel, especially when using JSON APIs and JavaScript frontends like Vue or Inertia. The root cause is that PHP’s PDO (which Laravel uses under the hood) fetches numeric columns as strings by default, especially for large integers (like bigint), to avoid precision loss. However, the behavior can differ based on:
- The database driver version (MySQL vs MariaDB, and their respective PDO drivers)
- The PHP version
- The platform (sometimes Docker images have different defaults)
- The database connection options
Why does this happen?
- On some systems, PDO returns
bigintcolumns as strings to prevent integer overflow (since PHP integers are platform-dependent). - On other systems, especially if the value fits within PHP's integer range, it may be returned as an integer.
- This inconsistency can cause issues when your frontend expects a consistent type.
How to handle this?
1. Always Cast in Your Laravel Models
You already found the most robust solution: use Laravel's $casts property to ensure the correct type is sent to your frontend.
class YourModel extends Model
{
protected $casts = [
'your_bigint_column' => 'integer',
// other casts...
];
}
This guarantees that, regardless of how PDO fetches the value, your API responses will always have the correct type.
2. Consider JSON Encoding Options
If you use response()->json() or toJson(), you can pass the JSON_NUMERIC_CHECK option, but be careful: this will convert all numeric strings to numbers, which might have side effects (e.g., leading zeros lost).
return response()->json($data, 200, [], JSON_NUMERIC_CHECK);
3. Check Your Database Connection Options
You can try forcing PDO to return native types by setting the PDO::ATTR_EMULATE_PREPARES and PDO::ATTR_STRINGIFY_FETCHES options in your config/database.php:
'mysql' => [
// ...
'options' => [
PDO::ATTR_EMULATE_PREPARES => false,
PDO::ATTR_STRINGIFY_FETCHES => false,
],
],
But note: This may not always work for bigint columns, especially if the value exceeds PHP's integer size.
4. Be Consistent in Your Frontend
If possible, always use strict equality (===) in JavaScript, and be aware that JSON from APIs may have numbers as strings. Consider normalizing data in your frontend as a last resort.
Summary:
- The difference is due to PDO, PHP, and database driver/platform differences.
- Always cast your model attributes in Laravel for consistency.
- Optionally, adjust PDO options or JSON encoding, but casting in models is the safest.
- Be aware of this issue when working with JavaScript frontends.
Let me know if you want to dig into your specific Docker and server configs for more details!