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Retrieve all Project Threads where a given users has posted a Project Post
A user belogns to a ProjectThread. And a ProjectThread has_many Users through ProjectPosts.
On the Project Thread Index I want to display only threads where a given users has posted a Project Post.
How would I go about doing that?
class ProjectThreadsController < ApplicationController
def index @project_thread = if current_user.project_posts.any? ProjectThreads.all end end
There might be a slicker way, but this works:
This will select all the current_users project_posts, pluck the ID's of the project_thread_id, then call uniq to ensure that if a user had multiple posts in a single thread, you won't get duplicate threads.
And just to make sure, your description of how you have your models setup doesn't sound right. They should be like this:
# user model class User < ApplicationRecord has_many :project_threads, through: :project_posts has_many :project_posts end # project_thread model class ProjectThread < ApplicationRecord has_many :users, through: :project_posts has_many :project_posts end # project_post model class ProjectPost < ApplicationRecord belongs_to :user belongs_to :project_thread end
How would would I create a private method to prevent other users from accessing Project Threads that dont belong to them?
I currently have something like this:
def require_permission if current_user != ProjectThread.friendly.find(params[:id]).user redirect_to root_path end end
But this only works if the user is the ProjectThread owner.
And currently I have my models setup like this. it seems to be working okay.
class User < ApplicationRecord has_many :project_threads has_many :project_posts end class ProjectThread < ApplicationRecord belongs_to :user, optional: true has_many :project_posts has_many :users, through: :project_posts end class ProjectPost < ApplicationRecord belongs_to :user, optional: true belongs_to :project_thread, optional: true end
You need another table that handles assignments to threads.
# project_thread_access model # you'll need user_id and project_thread_id columns in this model belongs_to :project_thread_accessable, :polymorphic => true # project_thread model has_many :project_thread_access, as: :project_thread_accessable # user model has_many :project_thread_access, as: :project_thread_accessable
This would let you do something like:
current_user.project_thread_access which would return a list of project_threads that user has been assigned to.
Now, you can do something like:
def show redirect_to root_url, alert: "Sorry, but you do not have access to this thread" unless current_user.project_thread_access.pluck(:project_thread_id).include?(params[:id]) end
*updated redirect - alert needs to be before the condition
I haven't tested this, so it may need some tweaking - but you should get the idea