In Rails, show for nested resources not working - ruby-on-rails

Question

I am using nested resources. When I click on a goal that's been created, I keep getting this error:
param is missing or the value is empty: goal
And it directs me to the "params.require..." line:
private
def goal_params
params.require(:goal).permit(:text)
end
I'm not sure what's causing this. I can create and show the list. But when I click on a goal I get this error. I'm new to rails and I'm at my wit's end.
My view:
<h1>Listing goals</h1>
<table>
<tr>
<th>Text</th>
<th></th>
</tr>
<% #user.goals.each do |goal| %>
<tr>
<td><%= link_to goal.text, user_goals_path(#user, #goal)%></td>
</tr>
<% end %>
</table>
<h2>Add a comment:</h2>
<%= form_for([#user, #user.goals.build]) do |form| %>
<p>
<%= form.text_area :text %>
</p>
<p>
<%= form.submit %>
</p>
<% end %>
My controller:
class GoalsController < ApplicationController
def index
#user = User.find(params[:user_id])
#goal = #user.goals.find(goal_params)
end
def show
#user = User.find(params[:user_id])
#goal = #user.goals.find(:id)
#also tried goal_params and :goal_id instead of :id
end
def new
#user = User.find(params[:user_id])
#goal = #user.goals.new
end
def create
#user = User.find(params[:user_id])
#goal = #user.goals.build(goal_params)
#goal.user = current_user
if #goal.save
redirect_to new_user_goal_path, notice: "Success!~"
else
redirect_to new_user_goal_path, alert: "Failure!"
end
#to root_path
end
private
def goal_params
params.require(:goal).permit(:text)
end
end
My routes:
Rails.application.routes.draw do
devise_for :users
resources :user do
resources :goals
end
devise_scope :user do
authenticated :user do
root 'home#index', as: :authenticated_root
end
unauthenticated do
root 'devise/sessions#new', as: :unauthenticated_root
end
end
end
My show.html.erb:
<p>
<strong>Text:</strong>
<%= #goal.text %>
</p>

Answer 1

First thing, in the show
#goal = #user.goals.find(:id)
Should be
#goal = #user.goals.find(params[:id])
You said you tried with #user.goals.find(goal_params) in show action and I see it in your index action also. This will call the goal_params method, which require params[:goal] while your index or show request does not send to server, only when you submit the form, you will have that params. This is the cause of your error.
Second thing, your index should use
#goals = #user.goals
INSTEAD OF
#goal = #user.goals.find(goal_params)
Also, the strong parameters is used for create and update actions only to avoid mass assignment to our database. It's not used to find a record.