let users edit their own posts

I currently have it setup to where only the admin can edit posts, but would like if the user can edit their posts but no other posts that were not made by them.

Forum Posts Controller

class ForumThreads::ForumPostsController < ApplicationController
before_action :authenticate_user!
before_action :set_forum_thread

def create
@forum_post = @forum_thread.forum_posts.new forum_post_params
@forum_post.user = current_user

if @forum_post.save
  redirect_to forum_thread_path(@forum_thread, anchor: "forum_post_#{@forum_post.id}"), notice: "Successfully posted!"
else
  redirect_to @forum_thread, alert: "Unable to save your post"
end

end

def edit
@forum_thread = ForumThread.friendly.find(params[:forum_thread_id])
@forum_post = ForumPost.find(params[:id])
@forum_post = current_user.forum_posts.find(params[:id])
end

def update
@forum_post = ForumPost.find(params[:id])
if @forum_post.update(forum_post_params)
redirect_to @forum_thread
else
render 'edit'
end
end

def destroy
@forum_post = ForumPost.find(params[:id])
@forum_post.destroy
redirect_to @forum_thread
end

private

def set_forum_thread
  @forum_thread = ForumThread.friendly.find(params[:forum_thread_id])
end

def forum_post_params
  params.require(:forum_post).permit(:body)
end

end

HTML

<%= div_for @forum_post do %>

<% end %>

You should take a look at his episode on the pundit gem. Sounds like exactly what you need. :)

You beat me to it! Pundit's exactly the right thing for this.