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First argument in form cannot contain nil or be empty
Alright everyone, I would greatly appreciate your help solving this problem. Here is what I'm attempting to do; I have an articles controller and all the related views to create new article posts.
class ArticlesController < ApplicationController def index @articles = Article.all end def new @article = Article.new end def create @article = Article.new( title: params[:article][:title], body: params[:article][:body]) @article.save redirect_to article_path(@article) end def show @article = Article.find(params[:id]) end end
This controller works fine when I go to a form that was generate by the scaffolding. I can navigate to articles/new and then fill the form out for a new article and it posts perfectly. Here is my dilemma, I have a separate view and controller for an admin page, and I want to be able to copy the form from the articles/new view into that admin/index view. For some reason I am having an issue posting to another controller from a separate view. Can someone please shed light on this, after spending countless hours over this weekend, you can imaging how frustrating this is getting :rage:
<%= form_for @article do |f| %> <ul> <% @article.errors.full_messages.each do |error| %> <li><%= error %></li> <% end %> </ul> <p> <%= f.label :title %><br /> <%= f.text_field :title %> </p> <p> <%= f.label :body %><br /> <%= f.text_area :body %> </p> <p> <%= f.submit %> </p> <% end %>
class AdminController < ApplicationController def index render layout: "admin_layout" end end
The error sign that I am getting when I navigate to localhost:3000/admin/index is: First argument in form cannot contain nil or be empty
Any help I could get from you more experience would be amazing. Thank you a ton in advanced! :joy:
In your admin controller you need to instantiate
@article in your Admin Controller's
index action. Something like this:
@article = Article.order('created_at DESC') or simply
@article = Article.all if you don't care about the order it should default to sorting by
James, you are exactly correct. Thank you for the feedback and helping me.