Rails 7: implementing JSON API pagination and sorting using ActiveModelSerializers
I'm following best practices but I'm experimenting with I've looked through the documentation and I'm still confused about I'm working with a scenario with implementing pagination and sorting for a JSON API response using ActiveModelSerializers in my Rails 7 application... I have a `Post` model that I want to return paginated results along with sorting based on different attributes. I am using the `kaminari` gem for pagination and `active_model_serializers` for formatting the JSON response. Here's a simplified version of my `PostsController`: ```ruby class PostsController < ApplicationController def index @posts = Post.order(params[:sort] || 'created_at DESC').page(params[:page]) render json: @posts, each_serializer: PostSerializer end end ``` I also have a serializer defined like so: ```ruby class PostSerializer < ActiveModel::Serializer attributes :id, :title, :content, :created_at end ``` I expect the API to return paginated results sorted according to the `sort` query parameter (e.g., `?sort=title`) or by default by `created_at DESC`. However, I'm getting the following behavior when I try to access the endpoint: ``` ArgumentError: comparison of Post with Post failed ``` This behavior seems to occur when the sorting is applied. I suspect it has something to do with how ActiveRecord is trying to sort the ActiveModel objects rather than the actual database records. I've tried logging the output of `@posts` before rendering but it doesn't provide any insights. I've also ensured that `params[:sort]` is a valid column name. Can anyone guide to identify what I'm doing wrong and how to correctly implement pagination and sorting in this context? What's the best practice here? I'm coming from a different tech stack and learning Ruby. Hoping someone can shed some light on this. I've been using Ruby for about a year now. I appreciate any insights!