Rails 7.1: How to properly use nested attributes with a custom form object for complex associations?
I'm having a hard time understanding I'm updating my dependencies and I'm getting frustrated with I'm currently working on a Rails 7.1 application where I have a `Project` model that has many `Tasks` and a `Task` can belong to many `Tags`. I've created a custom form object to streamline the input process for creating a new project along with its tasks and associated tags. However, I'm running into issues with how to handle the nested attributes properly. Here's what I have for my models: ```ruby class Project < ApplicationRecord has_many :tasks accepts_nested_attributes_for :tasks, allow_destroy: true end class Task < ApplicationRecord belongs_to :project has_many :task_tags has_many :tags, through: :task_tags accepts_nested_attributes_for :tags, allow_destroy: true end class Tag < ApplicationRecord has_many :task_tags has_many :tasks, through: :task_tags end ``` In my form object, I’ve set it up like this: ```ruby class ProjectForm include ActiveModel::Model attr_accessor :project, :tasks_attributes def initialize(project) @project = project @tasks_attributes = project.tasks.map(&:attributes) end def save return false unless valid? project.assign_attributes(tasks_attributes: tasks_attributes) project.save end def valid? project.valid? && tasks_attributes.all? { |task_attrs| Task.new(task_attrs).valid? } end end ``` When I try to submit the form, I'm getting the following behavior: ``` ActiveRecord::RecordInvalid in ProjectsController#create Validation failed: Tasks is invalid ``` I've already verified that the attributes are being passed correctly in the params, but I'm not sure how to track down which specific task or tag is causing the validation to unexpected result. I've tried adding some debug statements but I'm not getting any useful output. Do I need to adjust how I'm building the task attributes in my form object or is there something else I should be checking? Any advice on how to debug this would be appreciated! Any pointers in the right direction? Has anyone dealt with something similar? The stack includes Ruby and several other technologies. Thanks for your help in advance!