RoR: Param is missing or the value is empty - ruby-on-rails

Question

I am getting an error when I try to update a prop(which is like an article). I can create a prop but when I go to edit it I get the following error:
This is my props controller:
class PropsController < ApplicationController
attr_accessor :user, :answer, :choice, :prop
def index
#props=Prop.all
end
def show
#prop = Prop.find(params[:id])
end
def new
#prop = Prop.new
#user = User.find(session[:user_id])
end
def edit
#prop = Prop.find(params[:id])
#user = User.find(session[:user_id])
#answer = #user.answers.update(prop_params)
end
def create
#prop = Prop.new(prop_params)
#user = User.find(session[:user_id])
#answer = Answer.new
if #prop.save
redirect_to #prop
else
render 'new'
end
end
def update
#user = User.find(session[:user_id])
#prop = Prop.find(params[:prop_id])
#answer = #user.answers.update(answer_params)
if #prop.update(prop_params)
redirect_to #prop
else
render 'edit'
end
if #answer.choice == #prop.choice
puts "hello"
#user.score += 7
#user.save
else
#user.score -= 7
#user.save
end
end
def destroy
#prop = Prop.find(params[:id])
#prop.destroy
redirect_to props_path
end
def select
#prop = Prop.find(params[:choice])
end
end
private
def prop_params
params.require(:prop).permit(:title, :text, :choice, :user_id, :id)
end
def answer_params
params.require(:answer).permit(:choice, :id, :prop_id, :user_id)
end
This is my form. It is a partials shared between the new and edit views:
<%= form_for #prop do |f| %>
<% if #prop.errors.any? %>
<div class="error_explanation">
<h2>
<%= pluralize(#prop.errors.count, "error") %>
prohibited this prop from being saved:
</h2>
<ul>
<% #prop.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<p>
<%= f.label :title %><br>
<%= f.text_field :title %>
</p>
<p>
<%= f.label :text %><br>
<%= f.text_area :text %>
</p>
<%= f.radio_button(:choice, "A") %>
<%= f.label(:choice, "The Correct Answer is A") %>
<%= f.radio_button(:choice, "B") %>
<%= f.label(:choice, "The Correct Answer is B") %>
<%= f.radio_button(:choice, "C") %>
<%= f.label(:choice, "The Answer Has Yet To Be Determined") %>
<%= f.hidden_field :user_id, :value => #user.id %>
<p>
<%= f.submit %>
</p>
<% end %>

Answer 1

Can you please change your update action as:
def update
#user = User.find(session[:user_id])
#prop = Prop.find(params[:prop_id].merge(:user_id => #user))
#answer = #user.answers.update(answer_params)
if #prop.update(prop_params)
redirect_to #prop
else
render 'edit'
end
if #answer.choice == #prop.choice
puts "hello"
#user.score += 7
#user.save
else
#user.score -= 7
#user.save
end
end
and your prop params as:
def prop_params
params.require(:prop).permit(:title, :text, :choice, :id)
end
This helps in sending the user_id into the prop table by using merge method. Try this I hope this could resolve your issue and make sure you change your create action to send the user_id into prop table.