Laravel Eloquent whereRaw sql clause returns all rows when using OR operator
Stefan Bogdanescu
Founder & Senior Architect · 2026-06-29
# Laravel Eloquent whereRaw SQL Clause with OR: Navigating Complex Relationship Filtering
As senior developers working with the Laravel ecosystem, we often leverage the power of Eloquent to interact with relational databases. Eloquent's Object-Relational Mapper (ORM) provides a beautiful abstraction layer over raw SQL, making development fast and readable. However, when we dive into more complex filtering scenarios—especially involving custom logic within `whereRaw` clauses combined with relationship constraints like `whereHas`—we often encounter subtle behavioral differences between pure SQL execution and Eloquent's interpretation.
This post addresses a specific pain point encountered when trying to filter models based on multiple, mutually exclusive or inclusive conditions using the `OR` operator in raw SQL statements. We will dissect why this behavior occurs and explore the most idiomatic Laravel solutions for achieving complex filtering.
## The Challenge: Eloquent, whereRaw, and the OR Operator
The scenario presented involves fetching users associated with *either* Group 'KO11' *or* Group 'KO05'. The user attempted to use `whereHas` combined with a `whereRaw` clause containing an `OR` condition:
```php
User::select(array('name','surname','GroupId'))
->with(array('Group' => function($q) {
$q->select(array('Id','GroupId', 'GroupDescription'));
}))
->whereHas('Group', function($q) {
$q->whereRaw("GroupId = 'KO11' OR GroupId = 'KO05'"); // The problematic line
})->get();
```
When this query executes, the database often returns unexpected results (in this case, all rows), as evidenced by the SQL log dump. This indicates that while the raw SQL *is* valid in standard SQL, its interaction with Eloquent's relationship constraints (`whereHas`) and underlying join logic causes ambiguity or incorrect filtering when using `OR` across multiple related entities.
The core issue is that `whereHas` inherently checks for the *existence* of a related record based on the criteria defined within its closure. When introducing an `OR` condition, the subquery generated by the database might return rows that satisfy one part of the OR condition, and Eloquent’s mechanism struggles to correctly aggregate these results back to the parent model when multiple potential matches exist across different relationships or constraints.
## Why Raw SQL Becomes Tricky in OR Scenarios
The provided log clearly shows that applying `OR` within a subquery used by `whereHas` leads to an inflated result set, suggesting the database is finding many more paths to satisfy the existence check than intended for filtering the primary model. This highlights a common pitfall: relying too heavily on raw SQL for complex boolean logic within ORM constraints can bypass Eloquent’s built-in safety mechanisms designed to handle relationship integrity.
When dealing with relationships, we should strive to let Eloquent handle the joins and filtering whenever possible. For simple existence checks, this is ideal. For complex multi-condition filtering, more structured approaches are safer and more maintainable.
## Best Practices: Idiomatic Laravel Solutions
Instead of forcing complex boolean logic into a single `whereRaw` clause within `whereHas`, we should look for solutions that leverage Eloquent’s native capabilities or structure the query differently.
### 1. The Preferred Method: Separate Queries (or Nested WhereHas)
The safest and most readable approach is often to perform separate relationship checks, which allows Eloquent to manage the filtering cleanly. If you need users associated with Group A *or* Group B, you can use nested or chained `whereHas` clauses combined with grouping logic if necessary, but for simple OR conditions across different relationships, direct querying might be clearer:
```php
$groupIds = ['KO11', 'KO05'];
// Fetch users belonging to Group KO11 OR Group KO05
$users = User::whereHas('group', function ($query) use ($groupIds) {
$query->whereIn('groups.id', $groupIds);
})->get();
```
This approach delegates the complex filtering entirely to Eloquent's highly optimized relationship handling, ensuring that the resulting query structure is sound. This strategy aligns perfectly with the principles of maintainable code promoted by teams utilizing frameworks like Laravel and its powerful features found on [laravelcompany.com](https://laravelcompany.com).
### 2. Using `whereIn` for Direct Foreign Key Filtering (If Applicable)
If your goal is simply to select users based on their foreign key relationship, and you don't strictly need the complexity of a many-to-many check via `whereHas`, filtering directly on the foreign key is more efficient:
```php
$users = User::whereIn('group_id', ['KO11', 'KO05'])->get();
```
This avoids the overhead of the relationship constraint checks when the data structure allows for direct filtering on the primary table.
## Conclusion
While `whereRaw` provides unparalleled access to raw SQL capabilities, it demands a deep understanding of how that SQL interacts with the ORM layer. For complex boolean logic involving `OR` operators across Eloquent relationships, relying on methods like `whereHas` combined with simple `whereIn` clauses is significantly more robust, readable, and less prone to unexpected results than embedding raw conditional logic directly into `whereRaw`. By favoring idiomatic Laravel patterns, we ensure that our application code remains maintainable and leverages the full power of the framework.