Laravel scope - pass 2 parameters to scope

# Mastering Laravel Scopes: Passing Multiple Parameters for Complex Filtering As senior developers working with Laravel and Eloquent, we often encounter scenarios where simple one-to-one filtering isn't enough. We need to implement complex business logic that involves multiple conditions—an "AND" relationship between several filters. This is where Laravel Scopes shine, but understanding how to pass dynamic, multi-parameter data into a scope requires a bit of strategic design. This post will walk you through the challenge presented: how to effectively use Eloquent scopes to apply multiple, simultaneous filters (like filtering by both 'register' **and** 'forwarded' status) based on parameters passed via URL links. ## The Scenario: Multi-Condition Filtering Imagine a system where a user can request reports filtered by various statuses. We have three statuses: `register`, `forwarded`, and `done`. Our goal is to allow the user to select any combination of these states. The challenge lies in the dynamic nature of the URL parameters, specifically when a link needs to represent an intersection of multiple conditions. Here are the links provided: 1. Filter by 'register'. 2. Filter by 'forwarded'. 3. Filter by both 'forwarded' **and** 'register'. The existing setup uses a scope like this: ```php public function scopeFilter($filter, $search) { return $filter->where('status', $search); } ``` When the third link passes both parameters (`f=forwarded,register`), we need a mechanism to handle these multiple values within our filtering logic. ## The Solution: Aggregating Parameters in the Scope The key to solving this is to adjust how the scope accepts its input. Instead of expecting a single status value for a single `where` clause, we will modify the scope to accept an array of desired statuses and use Eloquent's powerful `whereIn` or related logic to build the necessary query. ### Step 1: Modifying the Scope to Accept an Array We need to change the scope so it can handle multiple status values simultaneously. We will rename it slightly for clarity, perhaps making it more general, but we will focus on adapting the logic within the existing structure. For complex filtering, it is often cleaner to create a dedicated method or adjust the parameter handling in the controller before calling the scope chain. However, let's see how we can adapt the single scope effectively. Instead of relying solely on a single `$search` parameter, we will ensure the input passed to the scope is an array of statuses if multiple filters are requested. ### Step 2: Implementing the Multi-Filter Logic Since we want an **AND** relationship (the report must be *both* registered *and* forwarded), we should use `whereIn` for each condition, which Eloquent automatically joins with an implicit `AND`. Here is how we can redesign the scope to handle multiple statuses: ```php use Illuminate\Database\Eloquent\Builder; class PsaReports extends Model { public function scopeFilter(Builder $query, array $statuses): Builder { if (empty($statuses)) { return $query; // Return the query unchanged if no filters are provided } // Build a WHERE IN clause for the 'status' column. This ensures that // ALL statuses provided in the array must match a record. $query->whereIn('status', $statuses); return $query; } } ``` ### Step 3: Integrating with the Controller Logic Now, let’s look at how the controller handles the input from the URL. When multiple parameters are passed (e.g., `f=forwarded,register`), the inputs will be separate query parameters that need to be collected and processed before being passed to our scope. In your controller snippet: ```php use Illuminate\Support\Facades\Input; // ... inside the method $filters = Input::get('f', []); // Get comma-separated string or an empty array if not present $statuses = array_filter(explode(',', $filters)); // Split the string into an array of statuses if (!empty($statuses)) { $reports = PsaReports::filter($statuses) // Pass the array directly to the scope ->with('automat', 'failure') ->orderBy('incoming_day', 'desc') ->orderBy('incoming_time', 'desc') ->paginate(30); } else { // Handle case where no filter is applied $reports = PsaReports::paginate(30); } ``` By collecting the incoming request parameters into an array (`$statuses`) and passing that array directly to the scope, we leverage the power of `whereIn`. This approach is much more robust than trying to chain multiple single-value scopes together, making your code cleaner and adhering to the DRY (Don't Repeat Yourself) principle, a core tenet of good Laravel development. ## Conclusion Dealing with complex, multi-conditional filtering in Eloquent requires shifting focus from single-parameter scopes to flexible input handling. By modifying your scope to accept an array of values and ensuring your controller correctly aggregates the incoming request data into that array, you can create highly flexible and readable querying logic. This pattern is fundamental to building scalable applications with Laravel, allowing you to manage intricate database relationships efficiently. For more advanced Eloquent techniques and best practices, always refer to resources like the official documentation found on [laravelcompany.com](https://laravelcompany.com).