Amazing View

Huge mistake in last article.

Since we didn't create a Post object yet, the query:

rails console
>>> Post.find(3)

Won't return an object with ID = 3. Rather an empty object/ nil. Cos duh!?

My bad. Got distracted by everyday fantasy-land livin'

Let's write a rails form to create a new post today.

As we know, the new action in PostsController points to the new.html.erb file in views.

Yes. You guessed it right. We create our new @post object in the action :new.

And display it in the views.

class PostsController < ApplicationController
  def new
    @post = Post.new
  end

  def create
    # ...
  end
end

We have successfully created a new Post instance @post.

Let's create a rails form to get the user input for @post attributes.

# app/views/posts/new.html.erb

<%= form_with model: @post do |form| %>
  <%= form.label :title %>
  <%= form.text_field :title %>
  <br>
  <%= form.label :body %>
  <%= form.text_field :body %>
<% end %>

Rails provides form_with helpers. Please refer to the documentation here: guides.rubyonrails.org/form_helpers.html

Now we add methods to create action in our controller to store the input data and return a message.

class PostsController < ApplicationController
  def new
    @post = Post.new
  end

  def create
    @post = Post.new(post_params)
    if @post.save
      flash[:notice] = "Post created successfully!"
      redirect_to @post
    else
      render :new
    end
  end

private
  def post_params
    params.require(:post).permit(:title, :body)
  end
end

The action :post_params uses the params helper provided by Rails to declare the permitted parameters.

The redirect_to callback renders the show.html.erb for the passed value @post.

# app/controllers/posts_controller.rb

class PostsController < ApplicationController
  def show
    @post = Post.find(params[:id])
    # -> params[:id] accepts the attribute ':id' from Post model parameters.
  end
end


# app/views/posts/show.html.erb

<h3><%= @post.title %></h3><br>
<p><%= @post.body %></p>

Before we go ahead with other methods :edit, :update and :destroy...

Let's take a quick peek at basic routes and validations at the next article.

Gud-buy!

Note:

I might skip ahead a few steps from now on. I do not want to be another "Rails Tutorial" yet just want to share my learning experience as I am very new to the Rails framework as well.
Please feel free to contact me through comments section or my mdevroot twitter if you need anything specific or report errors. Thank you.
The Rails and Ruby have highly informative and precise documentation.
Make sure to learn and understand Symbols in Ruby and how they are implemented in Rails.

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Amazing View

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