Laravel 10: Querying Polymorphic Relationships with Filters on Nested Attributes
I've been struggling with this for a few days now and could really use some help. I'm maintaining legacy code that I'm prototyping a solution and I'm working with a Laravel 10 application that uses polymorphic relationships to manage comments on various models (like posts and videos)..... I have a `Comment` model that can belong to either a `Post` or a `Video`, and I need to filter comments based on nested attributes of the `Post` or `Video`. However, I'm struggling with how to effectively construct the query to achieve this. I've set up my models as follows: ```php class Comment extends Model { public function commentable() { return $this->morphTo(); } } class Post extends Model { public function comments() { return $this->morphMany(Comment::class, 'commentable'); } } class Video extends Model { public function comments() { return $this->morphMany(Comment::class, 'commentable'); } } ``` I want to filter comments where the related `Post` has a certain status or the related `Video` has a specific category. My initial attempt at querying looks like this: ```php $comments = Comment::with(['commentable']) ->whereHas('commentable', function ($query) { $query->where('status', 'published'); }) ->get(); ``` This works fine for filtering `Post` comments, but I need to extend it to also include filters for `Video` comments, specifically when checking categories. I've tried using an `orWhereHas` condition, but it's yielding unexpected results, and I believe it's because of how the relationships are structured. Here’s my modified query attempt: ```php $comments = Comment::with(['commentable']) ->whereHas('commentable', function ($query) { $query->where('status', 'published'); }) ->orWhereHas('commentable', function ($query) { $query->where('category', 'featured'); }) ->get(); ``` However, I'm receiving an error stating that "Column not found: 1054 Unknown column 'category' in 'where clause'" when there are comments linked to `Posts` because the `orWhereHas` is checking the `Video` fields even when the relationship is not relevant. What’s the best way to structure this query to avoid this error and correctly filter comments based on both the `Post` and `Video` attributes? Any insights or best practices would be greatly appreciated. This is part of a larger application I'm building. I'd really appreciate any guidance on this. I'm working in a Windows 11 environment. For context: I'm using Php on Linux. Thanks in advance!