Rials Routing Error:Because of Controller name different from model name? - ruby-on-rails

Question

everyone! I am new to rails and working on Codecademy tutorials. But I wanted to see if I can run the same app on my mac using VS Code and got into some roadblocks. The application is basically to create a form that takes in messages and displays it (in the index view). I wanted to explore changing the names of controller and model to what I want and guess I messed up the internal routing. Following is the controller (messagec)
class MessagecController < ApplicationController
def index
#messages1 = MessagesMo1.all
end
def new
#messages2 = MessagesMo1.new
end
def create
#messages2 = MessagesMo1.new(message_params)
if #messages2.save #tells if the object is saved successfully in db or not
flash[:success] = "Great! Your post has been created!"
redirect_to '/messages'
else
flash.now[:error] = "Fix your mistakes, please."
render 'new'
end
end
private
def message_params
params.require(:message).permit(:content)
end
end
THe following is the model (messagesmo1)
class CreateMessagesMo1s < ActiveRecord::Migration[6.0]
def change
create_table :messages_mo1s do |t|
t.text :content
t.timestamps
end
end
end
The following is the routes.rb file
get '/messages' => 'messagec#index'
get '/messages/new' => 'messagec#new'
post 'messages' => 'messagec#create'
post 'messages_mo1s' => 'message_mo1s#create'
The following is the code in create.html.erb file
<%= form_for(#messages2) do |f| %>
<div class = "field">
<%= f.label :message %><br>
<%= f.text_area :content %>
</div>
<div class = "actions">
<%= f.submit "Create" %>
</div>
<% end %>
I am able to see the message list and able to go to create new message page. But when I submit the form, I am getting the following Routing error:
uninitialized constant MessageMo1sController Did you mean? MessagecController MessagesMController
My first questions is:
1) What am I missing in the routes.rb file?
2) Is there any rule between naming the model similar to that of the controller?

Answer 1

I just replicated all of the above, I think there are many things to keep in mind.
Your model file must be of name messagesmo1.rb and in this model:
class MessagesMo1 < ApplicationRecord
end
Your controller file should be of name messagec_controller.rb and in it:
def index
#messages1 = MessagesMo1.all
end
def new
#messages2 = MessagesMo1.new
end
def create
#messages2 = MessagesMo1.new(message_params)
if #messages2.save #tells if the object is saved successfully in db or not
flash[:success] = "Great! Your post has been created!"
redirect_to '/messages'
else
flash.now[:error] = "Fix your mistakes, please."
redirect_to '/messages/new'
end
end
private
def message_params
params.require(:messages_mo1).permit(:content)
end
In the above point, look at the message_params part, it must be :messages_mo1 and not :message
No changes required in _form.html.erb file
Your migration file must be of name timestamp__create_messages_mo1s.rb and it must have:
class CreateMessagesMo1s < ActiveRecord::Migration[6.0]
def change
create_table :messages_mo1s do |t|
t.text :content
t.timestamps
end
end
end
In your routes.rb file, change the last route:
get '/messages' => 'messagec#index'
get '/messages/new' => 'messagec#new'
post 'messages' => 'messagec#create'
post 'messages_mo1s' => 'messagec#create'
Make sure all your links are updated in index.html.erb, in show.html.erb and in new.html.erb -> Like links to show, delete, edit etc. Or if your just testing remove these links.
After making above changes, run rails db:drop db:create db:migrate as it will clean your DB of old migration.
That's it, now everything should work. The main problem is naming convention should be standard across all files. So it's better to use standard convention.

Answer 2

It finally worked. Following are the 2 changes:
1) Instead of <%= form_for(#messages2) do |f| %>, I used a URL parameter
<%= form_for(#messages2, url:'/messages/') do |f| %>
2)As #cdadityang mentioned, I updated the params to params.require(:messages_mo1).permit(:content)
without the URL being given explicitly, I think the rails is assuming '/message_mo1' are the path. So the URL is basically taking it to 'messagec#create'