NoMethodError in Profiles#show undefined method `about' for nil:NilClass - ruby-on-rails

Question

I am currently re-working my routes, which leads to a lot of mistakes in my Rails App. I am coming from something like
users/:user_id/profiles/id/reviews
to
/users/:user_id/profile/reviews
After registering a user gets redirected (redirect_after_sign_up) to a profile
/users/:user_id/profile/new
where the user can fill out the form (a allow nested attributes for profile)
<%= form_for(#user, url: user_profile_path, method: :post) do |form| %>
<div class="field">
<%= form.label :street %>
<%= form.text_area :street %>
</div>
<%= fields_for(:profile) do |profile_fields| %>
<div class="field">
<%= profile_fields.label :about %>
<%= profile_fields.text_area :about %>
</div>
<div class="field">
<%= profile_fields.file_field :avatar %>
<% profile_fields.label "Profile photo" %>
</div>
<% end %>
<div class="actions">
<%= form.submit "Save your profile", class: "btn btn-default" %>
</div>
<% end %>
After I click submit, these data won't save anywhere. The user also won't get redirected to the #show, as, there are obviously some problems with my profiles controller. Neither #show, nor #create works. Here is the controller
class ProfilesController < ApplicationController
before_action :set_profile, only: [:show, :edit, :update, :destroy]
def show
#profile = current_user.profile
#review = Review.new
Review.where(profile: #profile)
end
def new
#user = User.eager_load(:profile).find(params[:user_id])
#profile = Profile.new
end
def edit
#profile = #user.profile
end
def create
#user = current_user
#profile = current_user.build_profile(profile_params)
respond_to do |format|
if #profile.save
format.html { redirect_to user_profile_path(current_user.id), notice: 'Profile was successfully created.' }
format.json { render :show, status: :created, location: #profile }
else
format.html { render :new }
format.json { render json: #profile.errors, status: :unprocessable_entity }
end
end
end
def update
respond_to do |format|
if #profile.update(profile_params)
format.html { redirect_to user_profile_path(current_user.id), notice: 'Profile was successfully updated.' }
format.json { render :show, status: :ok, location: #profile }
else
format.html { render :edit }
format.json { render json: #profile.errors, status: :unprocessable_entity }
end
end
end
# DELETE /profiles/1
# DELETE /profiles/1.json
def destroy
#profile.destroy
respond_to do |format|
format.html { redirect_to users_url, notice: 'Profile was successfully destroyed.' }
format.json { head :no_content }
end
end
private
def set_profile
#profile = current_user.profile
end
def profile_params
params.permit(:about, :avatar)
end
end
I really need help adjusting the controller, so it works without a profile_id. Here is the show page, just in case:
<% if #profile == current_user.profile %>
<strong> Welcome </strong><%= current_user.first_name %>
<% else %>
<strong> This is a profile of </strong><%= #profile.user.first_name %> <%= #profile.user.last_name %>
<% end %>
<p>
<strong>About:</strong>
<%= #profile.about %>
</p>
<strong>Profile image</strong>
<%= image_tag(url_for(#profile.avatar), style: 'width:50px; height:50px;') %>
</p>
<%= render 'reviews/form' %>
<% #reviews.each do |review| %>
<%= review.user.first_name %> <%= review.user.last_name %> wrote <small> <%= time_ago_in_words(review.created_at) %> ago </small>
<p>
<%= review.content %>
<br>
<strong> Rating </strong><%= review.rating %>
</p>
<% end %>
<%= link_to 'Edit', edit_user_profile(current_user.profile) %>
<%= link_to 'Show other profiles', users_path %>
<div class="container">
Thank you.
P.S. I tried to work with a ProfileController (single), but this didn't work at all, as the app wouldn't find the controller.
UPDATE:
So, I tried to play with the form, looks like the form won't save neither to profile nor to user. Even if I get rid of the nested attributes, it still doesn't save. This stays unresoled ...

Answer 1

as i can see you're using fields_for, so check a structure od params which are send when posting. I suppose they may look like:
user: { :street, profile_attributes: { :about, :avatar } }
and if yes, you need to change the permitted params method to match what is actually send.
Next advise is to add accepts_nested_attributes_for :profile in user model, and use fields_for proper way by saving profile in addition to saving user, because current code is little messy (form_for user with fields for profile leading to profile controller).
If you don't wan't to deal with nested attributes you may also rewrite form as form_for #profile ...