Laravel Version and Environment

Oct 13, 2025 by magicalceylontours.com 46 views

Introduction

In this article, we will discuss the issues that arise when using the ShouldBeUniqueUntilProcessing feature in Laravel with the database cache driver. We will explore two types of issues: one where the cache_locks table is missing a primary key, and another where an exception is thrown when using a properly migrated cache_locks table.

Laravel Version and Environment

Laravel Version: 11.44.1
PHP Version: 8.2.24
Database Driver & Version: MongoDB

Description

When using the ShouldBeUniqueUntilProcessing feature in Laravel, it is expected that only one instance of a job will be added to the queue. However, when the cache driver is set to database, two types of issues can occur.

Missing Primary Key on cache_locks Table

If the cache_locks table is not manually created and relies on an older migration for cache, it will be automatically created. However, it will lack a primary key on the key column. As a result, job uniqueness is not enforced, and when multiple jobs are dispatched, multiple instances are added to the queue.

Exception When Using a Properly Migrated cache_locks Table

If the cache_locks table is correctly created via migration, an exception occurs when a job is dispatched.

Error Message

The error message is as follows:

MongoDB\Driver\Exception\BulkWriteException: E11000 duplicate key error collection: flowbox.cache_locks index: key_1 dup key: { key: "laravel_cachelaravel_unique_job:FlowBox\Jobs\UpdateCmpJob:677c2ac0f9478c57fe018902" }
    at MongoDB\Driver\Server->executeBulkWrite(InsertMany.php:156)
    at MongoDB\Operation\InsertMany->execute(InsertMany.php:156)
    at MongoDB\Collection->insertMany(Collection.php:911)
    at MongoDB\Laravel\Collection->__call(Collection.php:49)
    at MongoDB\Laravel\Query\Builder->insert(Builder.php:687)
    at Illuminate\Cache\DatabaseLock->acquire(DatabaseLock.php:67)
    at Illuminate\Cache\Lock->get(Lock.php:91)
    at Illuminate\Bus\UniqueLock->acquire(UniqueLock.php:43)
    at Illuminate\Foundation\Bus\PendingDispatch->shouldDispatch(PendingDispatch.php:176)
    at Illuminate\Foundation\Bus\PendingDispatch->__destruct(PendingDispatch.php:200)
    at dispatch(helpers.php:428)
    at FlowBox\Components\CompDriver->update(CompDriver.php:1885)
    at FlowBox\Components\CompDriver->cmdUpdate(CompDriver.php:4391)
    at FlowBox\Components\CompDriver->runCommand(CompDriver.php:4178)
    at FlowBox\Models\Component->runCommand(Component.php:1133)
    at FlowBox\Components\Commands\CompCmd->run(CompCmd.php:44)
    at FlowBox\Components\Support\CommandRunner->run(CommandRunner.php:117)
    at FlowBox\Http\Controllers\Query\EvalController->runCommandSingle(EvalController.php:213)
    at Illuminate\Routing\Controller->callAction(Controller.php:54)
    at FlowBox\Http\Controllers\Controller->callAction(Controller.php:157)
    at FlowBox\Http\Controllers\API\ApiController->callAction(ApiController.php:40)
    at Illuminate\Routing\ControllerDispatcher->dispatch(ControllerDispatcher.php:43)
    ... 65 more

Steps To Reproduce

Missing Primary Key on cache_locks Table

Create the cache table without the cache_locks table.
Dispatch multiple jobs with ShouldBeUniqueUntilProcessing.
Check the jobs table, and all jobs should be there (which should be).

Exception When Using a Properly Migrated cache_locks Table

Create the cache and cache_locks tables.
Dispatch a job with ShouldBeUniqueUntilProcessing.
An error will be thrown.

Conclusion

In conclusion, when using the ShouldBeUniqueUntilProcessing feature in Laravel with the database cache driver, two types of issues can occur. The first issue is when the cache_locks table is missing a primary key, and the second issue is when an exception is thrown when using a properly migrated cache_locks table. To resolve these issues, it is recommended to manually create the cache_locks table with a primary key on the key column.

Recommendations

Manually create the cache_locks table with a primary key on the key column.
Use the ShouldBeUniqueUntilProcessing feature with caution when using the database cache driver.
Test the ShouldBeUniqueUntilProcessing feature thoroughly to ensure that it is working as expected.

Future Improvements

Improve the error handling mechanism to provide more informative error messages.
Enhance the ShouldBeUniqueUntilProcessing feature to support multiple cache drivers.
Provide more documentation on the ShouldBeUniqueUntilProcessing feature and its usage.
Q&A: Issues with ShouldBeUniqueUntilProcessing When Using Database Cache Driver ====================================================================================

Introduction

In our previous article, we discussed the issues that arise when using the ShouldBeUniqueUntilProcessing feature in Laravel with the database cache driver. We explored two types of issues: one where the cache_locks table is missing a primary key, and another where an exception is thrown when using a properly migrated cache_locks table. In this article, we will provide a Q&A section to address some of the most frequently asked questions related to this issue.

Q: What is the `ShouldBeUniqueUntilProcessing` feature in Laravel?

A: The ShouldBeUniqueUntilProcessing feature in Laravel is a mechanism that ensures that only one instance of a job is added to the queue. This feature is useful when you want to prevent multiple instances of a job from being executed concurrently.

Q: What is the purpose of the `cache_locks` table in Laravel?

A: The cache_locks table in Laravel is used to store locks that are acquired by the ShouldBeUniqueUntilProcessing feature. The cache_locks table is used to prevent multiple instances of a job from being executed concurrently.

Q: Why is the `cache_locks` table missing a primary key?

A: The cache_locks table is missing a primary key because it is not manually created and relies on an older migration for cache. When the cache_locks table is automatically created, it does not include a primary key on the key column.

Q: What is the error message when using a properly migrated `cache_locks` table?

A: The error message when using a properly migrated cache_locks table is as follows:

MongoDB\Driver\Exception\BulkWriteException: E11000 duplicate key error collection: flowbox.cache_locks index: key_1 dup key: { key: "laravel_cachelaravel_unique_job:FlowBox\Jobs\UpdateCmpJob:677c2ac0f9478c57fe018902" }
    at MongoDB\Driver\Server->executeBulkWrite(InsertMany.php:156)
    at MongoDB\Operation\InsertMany->execute(InsertMany.php:156)
    at MongoDB\Collection->insertMany(Collection.php:911)
    at MongoDB\Laravel\Collection->__call(Collection.php:49)
    at MongoDB\Laravel\Query\Builder->insert(Builder.php:687)
    at Illuminate\Cache\DatabaseLock->acquire(DatabaseLock.php:67)
    at Illuminate\Cache\Lock->get(Lock.php:91)
    at Illuminate\Bus\UniqueLock->acquire(UniqueLock.php:43)
    at Illuminate\Foundation\Bus\PendingDispatch->shouldDispatch(PendingDispatch.php:176)
    at Illuminate\Foundation\Bus\PendingDispatch->__destruct(PendingDispatch.php:200)
    at dispatch(helpers.php:428)
    at FlowBox\Components\CompDriver->update(CompDriver.php:1885)
    at FlowBox\Components\CompDriver->cmdUpdate(CompDriver.php:4391)
    at FlowBox\Components\CompDriver->runCommand(CompDriver.php:4178)
    at FlowBox\Models\Component->runCommand(Component.php:1133)
    at FlowBox\Components\Commands\CompCmd->run(CompCmd.php:44)
    at FlowBox\Components\Support\CommandRunner->run(CommandRunner.php:117)
    at FlowBox\Http\Controllers\Query\EvalController->runCommandSingle(EvalController.php:213)
    at Illuminate\Routing\Controller->callAction(Controller.php:54)
    at FlowBox\Http\Controllers\Controller->callAction(Controller.php:157)
    at FlowBox\Http\Controllers\API\ApiController->callAction(ApiController.php:40)
    at Illuminate\Routing\ControllerDispatcher->dispatch(ControllerDispatcher.php:43)
    ... 65 more

Q: How can I resolve the issue of the missing primary key on the `cache_locks` table?

A: To resolve the issue of the missing primary key on the cache_locks table, you can manually create the cache_locks table with a primary key on the key column.

Q: How can I prevent the exception from being thrown when using a properly migrated `cache_locks` table?

A: To prevent the exception from being thrown when using a properly migrated cache_locks table, you can use the ShouldBeUniqueUntilProcessing feature with caution and ensure that the cache_locks table is correctly created via migration.

Q: What are some best practices for using the `ShouldBeUniqueUntilProcessing` feature in Laravel?

A: Some best practices for using the ShouldBeUniqueUntilProcessing feature in Laravel include:

Manually creating the cache_locks table with a primary key on the key column.
Using the ShouldBeUniqueUntilProcessing feature with caution and ensuring that the cache_locks table is correctly created via migration.
Testing the ShouldBeUniqueUntilProcessing feature thoroughly to ensure that it is working as expected.

Conclusion

In conclusion, the ShouldBeUniqueUntilProcessing feature in Laravel is a powerful mechanism that ensures that only one instance of a job is added to the queue. However, it can be affected by issues such as the missing primary key on the cache_locks table and the exception thrown when using a properly migrated cache_locks table. By following the best practices outlined in this article, you can ensure that the ShouldBeUniqueUntilProcessing feature is working correctly and efficiently in your Laravel application.