Customized update route for each field of a form rails

I am trying to save each field of a form individually. But I have really hard time implementing it.

Here's the code I am trying.

users_controller.rb:

def update_name
  @user = User.find(params[:id])
  if @user.update_attributes(params.require(:user).permit(:name))
    # Handle a successful update.
    flash[:success] = "Name updated"
    redirect_to edit_user_path
  else
    render 'edit'   
  end
end

def update_email
  @user = User.find(params[:id])
  if @user.update_attributes(params.require(:user).permit(:email))
    # Handle a successful update.
    flash[:success] = "Email updated"
    render 'edit'
  else
    render 'edit'   
  end
end

routes.rb:

get 'users/:id/edit' => 'users#edit', :as => :edit_user
get  '/users/:id' => 'users#show', :as => :user
patch 'users/:id/name'=> 'users#update_name'
patch 'users/:id/email'=> 'users#update_email'

edit.html.erb:

<%= f.button "Save", :action => "update_name" , :method => :patch, class: "btn btn-primary", id:"editAccount" %>

<%= f.button "Save", :action => "update_email" , :method => :patch, class: "btn btn-primary", id:"editAccount" %>

I can go with normal update but I would like to save the fields individually.

How can I fix this? Thanks