create CRUD error

[sin0202123]

when I follow instruction to create CRUD and it show this error. How to fix this error????

Declaration of Illuminate\Database\PDO\Concerns\ConnectsToDatabase::connect(array $params, $username = null, $password = null, array $driverOptions = []) must be compatible with Doctrine\DBAL\Driver::connect(array $params): Doctrine\DBAL\Driver\Connection

[backpack-ai-bot]

The error you are seeing:

Declaration of Illuminate\Database\PDO\Concerns\ConnectsToDatabase::connect(array $params, $username = null, $password = null, array $driverOptions = []) must be compatible with Doctrine\DBAL\Driver::connect(array $params): Doctrine\DBAL\Driver\Connection

is related to an incompatibility between the version of Laravel, Doctrine DBAL, and possibly PHP that you are using.

Based on the knowledge sources, this type of error typically occurs when:

• You are using a version of Doctrine DBAL (v3.x) that is not compatible with your Laravel version (Laravel 6 or 7).
• Laravel 6 and 7 require Doctrine DBAL v2.x, but a composer update or composer require doctrine/dbal may have installed v3.x, which causes these method signature mismatches.

How to fix:

If you are using Laravel 6 or 7, you should downgrade Doctrine DBAL to v2.x. You can do this by running:

composer require doctrine/dbal:^2.6

This will ensure that the correct version of DBAL is installed and should resolve the error. If you upgrade to Laravel 8 or higher, you can use DBAL v3.x, but for Laravel 6/7, you must stick with v2.x. This solution is confirmed in multiple issues and is the recommended fix for this compatibility problem doctrine/dbal version conflict between Laravel v6 and Backpack 4.1 and CrudControllers with setFromDb() don't work with DBAL v3.

Summary:
Downgrade Doctrine DBAL to v2.x if you are on Laravel 6 or 7:

composer require doctrine/dbal:^2.6

If you are on Laravel 8 or higher, make sure all your packages are compatible with DBAL v3.x.

Let me know if you need more help!

ℹ️ Please note our AI Bot does not reply to follow-ups, this will be the only AI answer in this thread. If the AI helped you find the answer, please mark it as answered or write details below so it can learn. Then close the conversation. If not, please give more information for when a human reads this. ℹ️

Relevant sources:

Github Issue (closed): [Bug] One crud of many not properly working create/edit/preview pages.
Github Issue (closed): SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111 "Connection refused")
Github Issue (closed): Installation does not work with SQLSRV
Github Issue (closed): [Bug] backpack:crud TypeError in Symfony\Component\Process\Process::__construct() error
Github Issue (closed): Class 'CRUD' not found
Github Issue (closed): [4.1-beta] Error when saving using select2_from_array with an id other than the key (only in pgsql)
Github Issue (closed): Target class [Backpack\CRUD\app\Http\Middleware\AuthenticateSession] does not exist.
Github Issue (closed): Need 0.7.x for CRUD
Github Issue (closed): 4.1.* install on Laravel 8 [Bug]
Devtools error creating CRUD
Github Issue (closed): Installing 4.1 on Laravel 8
Github Issue (closed): [Bug] CrudControllers with setFromDb() don't work with DBAL v3
Github Issue (closed): [Bug] doctrine/dbal version conflict between Laravel v6 and Backpack 4.1

[sin0202123]

I checked my laravel version is 10.25.2

…

On Sun, May 25, 2025, 11:13 PM backpack-ai-bot[bot] < ***@***.***> wrote: *backpack-ai-bot[bot]* left a comment (Laravel-Backpack/docs#627) <#627 (comment)> The error you are seeing: Declaration of Illuminate\Database\PDO\Concerns\ConnectsToDatabase::connect(array $params, $username = null, $password = null, array $driverOptions = []) must be compatible with Doctrine\DBAL\Driver::connect(array $params): Doctrine\DBAL\Driver\Connection is related to an incompatibility between the version of Laravel, Doctrine DBAL, and possibly PHP that you are using. Based on the knowledge sources, this type of error typically occurs when: - You are using a version of Doctrine DBAL (v3.x) that is not compatible with your Laravel version (Laravel 6 or 7). - Laravel 6 and 7 require Doctrine DBAL v2.x, but a composer update or composer require doctrine/dbal may have installed v3.x, which causes these method signature mismatches. *How to fix:* If you are using Laravel 6 or 7, you should downgrade Doctrine DBAL to v2.x. You can do this by running: composer require doctrine/dbal:^2.6 This will ensure that the correct version of DBAL is installed and should resolve the error. If you upgrade to Laravel 8 or higher, you can use DBAL v3.x, but for Laravel 6/7, you must stick with v2.x. This solution is confirmed in multiple issues and is the recommended fix for this compatibility problem doctrine/dbal version conflict between Laravel v6 and Backpack 4.1 <Laravel-Backpack/CRUD#3910> and CrudControllers with setFromDb() don't work with DBAL v3 <Laravel-Backpack/CRUD#3597>. *Summary:* Downgrade Doctrine DBAL to v2.x if you are on Laravel 6 or 7: composer require doctrine/dbal:^2.6 If you are on Laravel 8 or higher, make sure all your packages are compatible with DBAL v3.x. Let me know if you need more help! ℹ️ *Please note our AI Bot does not reply to follow-ups, this will be the only AI answer in this thread. If the AI helped you find the answer, please mark it as answered or write details below so it can learn. Then close the conversation. If not, please give more information for when a human reads this.* ℹ️ *Relevant sources:* *Github Issue (closed): [Bug] One crud of many not properly working create/edit/preview pages. <Laravel-Backpack/CRUD#5494>* *Github Issue (closed): SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111 "Connection refused") <Laravel-Backpack/CRUD#1125>* *Github Issue (closed): Installation does not work with SQLSRV <Laravel-Backpack/CRUD#1337>* *Github Issue (closed): [Bug] backpack:crud TypeError in Symfony\Component\Process\Process::__construct() error <Laravel-Backpack/CRUD#3456>* *Github Issue (closed): Class 'CRUD' not found <Laravel-Backpack/CRUD#1161>* *Github Issue (closed): [4.1-beta] Error when saving using select2_from_array with an id other than the key (only in pgsql) <Laravel-Backpack/CRUD#2611>* *Github Issue (closed): Target class [Backpack\CRUD\app\Http\Middleware\AuthenticateSession] does not exist. <Laravel-Backpack/community-forum#343>* *Github Issue (closed): Need 0.7.x for CRUD <Laravel-Backpack/CRUD#249>* *Github Issue (closed): 4.1.* install on Laravel 8 [Bug] <Laravel-Backpack/CRUD#3515>* *Devtools error creating CRUD <Laravel-Backpack/community-forum#869>* *Github Issue (closed): Installing 4.1 on Laravel 8 <Laravel-Backpack/CRUD#3403>* *Github Issue (closed): [Bug] CrudControllers with setFromDb() don't work with DBAL v3 <Laravel-Backpack/CRUD#3597>* *Github Issue (closed): [Bug] doctrine/dbal version conflict between Laravel v6 and Backpack 4.1 <Laravel-Backpack/CRUD#3910>* — Reply to this email directly, view it on GitHub <#627 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/A5BX26TS6O6QEPRUGX455JL3AHMZXAVCNFSM6AAAAAB534CAFSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDSMBXHA4DINJTGI> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[pxpm]

Hope you have solved this by now.

It looks like some conflict with your dbal version and Laravel one. I do not think this relates with Backpack.