Find kachlikmatt on GitHub and fork lab. Open in an editor of your choice
To create a new Mysql project, in the cmd line type: rails new filename -d mysql
Using CMD line cd into your lab/house
Execute: rails g controller listings index //This will create your listings controller with a route to index.
Find what was updated in your app/controller. Then add: def index @listings = Listing.all end def show @listing = Listing.find(params[:id]) end def new @listing = Listing.new end
To stop from having to get the parameters every time we make a method call: private def listing_params params.require(:listing).permit(:address,:price,:description) end
In the command line now execute rake routes to see what rails has done
Now edit the view of your home page. please delete: Find local Listings and replace it with: <%= link_to 'Show all listings', controller: 'listings' %>
In app/view/listings/index input this code:
<% @listings.each do |listing| %>
<% end %>| Address: | Price: | Description: | |||
|---|---|---|---|---|---|
| <%= listing.address %> | <%= listing.price %> | <%= listing.description %> | <%= link_to 'Show',listing_path(listing) %> | <%= link_to 'Edit',edit_listing_path(listing) %> | <%= link_to 'Destroy', listing_path(listing), method: :delete, data: { confirm: 'Are you sure?' } %> |
Now in CMD prompt type: rails generate model Listing address:string price:string description:string time_stamp:timestamp Once you have added that go into app/model/listing.rb and add: has_many :comments, dependent: :destroy validates :address, presence: true, length: {minimum: 5}
Now you must migrate all this. CMD prompt: rake db:migrate
Now it is time to be able to add a listing. return to app/views/homepage/index under show all listings add: <%= link_to 'Create a new listing', new_listing_path %>
Then go back to app/controller/listings and add:
def edit @listing = Listing.find(params[:id]) end def destroy @listing = Listing.find(params[:id]) @listing.destroy
redirect_to listings_path
end def create @listing = Listing.new(listing_params)
if @listing.save
redirect_to @listing
else
render 'new'
end
end def update @listing = Listing.find(params[:id])
if @listing.update(listing_params)
redirect_to @listing
else
render 'edit'
end
end
Go to app/views/listing create a new file and add:
<%= render 'form' %>
<%= link_to 'Back', listings_path %> Save this file in listings as: new.html.erb Go to app/views/listing create a new file and add:
Address: <%= @listing.address %>
Price: <%= @listing.price %>
Description: <%= @listing.description %>
<%= render @listing.comments %> <%= render 'comments/form' %><%= link_to 'Edit', edit_listing_path(@listing) %> | <%= link_to 'All Listings', listings_path %> | <%= link_to 'Home', root_path %>
Save this file in listings as: show.html.erb
Now you must migrate all this. CMD prompt: rake db:migrate
Go into config/routes.rb delete: get 'listings/index' under get 'homepage/index' add: resources :listings do resources :comments end
Create new file under app/views/listings
<%= form_for @listing do |f| %>
<% if @listing.errors.any? %>
-
<% @listing.errors.full_messages.each do |msg| %>
- <%= msg %> <% end %>
<%= f.label :address %>
<%= f.text_field :address %>
<%= f.label :price %>
<%= f.text_field :price %>
<%= f.label :description %>
<%= f.text_area :description %>
<%= f.submit %>
<% end %>
save it as _form.hmtl.erb
Create new file under app/views/listings
<%= render 'form' %>
<%= link_to 'Back', listings_path %>
save it as edit.html.erb
Execute: rails g controller comments
go to app/controller/comments and add:
class CommentsController < ApplicationController def create @listing = Listing.find(params[:listing_id]) @comment = @listing.comments.create(comment_params) redirect_to listing_path(@listing) end
def destroy @listing = Listing.find(params[:listing_id]) @comment = @listing.comments.find(params[:id]) @comment.destroy redirect_to listing_path(@listing) end
private def comment_params params.require(:comment).permit(:commenter, :body) end end
This is what does all the work for you.
Create two new files to go into app/views/comments
Commenter: <%= comment.commenter %>
Comment: <%= comment.body %>
<%= link_to 'Destroy Comment', [comment.listing, comment], method: :delete, data: { confirm: 'Are you sure?' } %>
save this as _comment.html.erb
<%= form_for([@listing, @listing.comments.build]) do |f| %>
<%= f.label :commenter %>
<%= f.text_field :commenter %>
<%= f.label :body %>
<%= f.text_area :body %>
<%= f.submit %>
<% end %>save this as _form.html.erb
Now create a model for comments using commenter:string body:text listing:references After, update the database by migrating.
Complete.