Laravel WhereIn and GroupBy: How to Resolve the '1055 Error'?

Laravel: Understanding the '1055 Error' in WhereIn and GroupBy Queries

Problem:

In Laravel, attempting to utilize both WhereIn and GroupBy clauses in a single query results in the following error:

SQLSTATE[42000]: Syntax error or access violation: 1055 'sbrtpt.loading.id' isn't in GROUP BY

Explanation:

By default, Laravel's database configuration enforces strict SQL mode, which mandates that every column referenced in a WHERE clause must also appear in the GROUP BY clause if the query contains a GROUP BY operation. In this particular case, the id column is included in the WhereIn clause but not in the GroupBy clause, causing the error.

Solution:

There are two possible solutions to address this issue:

Option 1: Disable Strict Mode

To disable strict mode, navigate to the config/database.php file and modify the mysql array settings as follows:

'mysql' => [
    ...
    'strict' => false,
    ...
]

By setting strict to false, you effectively disable all strict mode rules.

Option 2: Specify Specific Modes

Alternatively, if you wish to preserve strict mode while only disabling the specific rule that is causing the issue, modify the 'modes' option within the 'mysql' array in config/database.php. For instance, to disable the ONLY_FULL_GROUP_BY mode, add the following line:

'modes' => [
    // Disable this to allow grouping by one column
    'ONLY_FULL_GROUP_BY',
    // Other strict mode options
]

Additional Information:

It is generally advisable to utilize the second option (specifying specific modes) as it allows you to disable only the necessary strict mode rules while maintaining the benefits of strict mode. By reviewing the documentation for your specific database management system (e.g., MySQL), you can determine which additional modes may be appropriate to handle this error.

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