chilianubogdan · October 12, 2020 03:24 · Mar 9, 2016 · Mar 9, 2016 · Mar 7, 2016 · Mar 7, 2016
diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -304,41 +304,10 @@ Reference: [http://guides.rubyonrails.org/asset_pipeline.html](http://guides.rub
 
 ### Form Helpers
 
-Create a basic form that posts to itself
-
-```html
-<%= form_tag do %>
-  Form contents
-<% end %>
-```
-```html
-<form accept-charset="UTF-8" action="/" method="post">
-  <input name="utf8" type="hidden" value="&#x2713;" />
-  <input name="authenticity_token" type="hidden" value="J7CBxfHalt49OSHp27hblqK20c9PgwJ108nDHX/8Cts=" />
-  Form contents
-</form>
-```
-
-Create a form with a custom action and method 
-
-```rb
-<%= form_tag("/search", method: "get") do %>
-  <%= label_tag(:q, "Search for:") %>
-  <%= text_field_tag(:q) %>
-  <%= submit_tag("Search") %>
-<% end %>
-```
-```html
-<form accept-charset="UTF-8" action="/search" method="get">
-  <input name="utf8" type="hidden" value="&#x2713;" />
-  <label for="q">Search for:</label>
-  <input id="q" name="q" type="text" />
-  <input name="commit" type="submit" value="Search" />
-</form>
-```
-
 Bind a form to a model for creating/updating a resource
 
+**Use this method if you're using strong params to protect against mass assignment**
+
 ```rb
 # app/controllers/photos_controller.rb
 def new
@@ -362,4 +331,22 @@ end
 </form>
 ```
 
+Create a form with a custom action and method 
+
+```rb
+<%= form_tag("/search", method: "get") do %>
+  <%= label_tag(:q, "Search for:") %>
+  <%= text_field_tag(:q) %>
+  <%= submit_tag("Search") %>
+<% end %>
+```
+```html
+<form accept-charset="UTF-8" action="/search" method="get">
+  <input name="utf8" type="hidden" value="&#x2713;" />
+  <label for="q">Search for:</label>
+  <input id="q" name="q" type="text" />
+  <input name="commit" type="submit" value="Search" />
+</form>
+```
+
 Reference: [http://guides.rubyonrails.org/form_helpers.html](http://guides.rubyonrails.org/form_helpers.html)
diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -56,6 +56,8 @@ Automagically create all the routes for a RESTful resource
 resources :photos 
 ```
 
+<img src="https://cloud.githubusercontent.com/assets/25366/8561247/75b73966-24d7-11e5-896a-06506648c4fe.png">
+
 HTTP Verb | Path | Controller#Action | Used for
 --------- | ---- | ----------------- | -------
 GET | /photos | photos#index | display a list of all photos

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -206,6 +206,8 @@ end
 
 ### Scaffolding
 
+Scaffolding is great for prototypes but don't rely too heavily on it: http://stackoverflow.com/a/25140503
+
 ```
 $ rails g scaffold Photo path:string caption:text
 $ rake db:migrate

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -46,6 +46,7 @@ get 'photos/show'
 
 # The above is the same as: 
 get 'photos/show', :to 'photos#show'
+get 'photos/show' => 'photos#show'
 ```
 
 Automagically create all the routes for a RESTful resource

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -1,5 +1,7 @@
 ## Ruby on Rails Cheatsheet
 
+### Architecture
+
 <img src="https://raw.githubusercontent.com/mdang/resources/master/ruby/rails/rails_architecture.png">
 
 ### Create a new application

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -1,7 +1,5 @@
 ## Ruby on Rails Cheatsheet
 
-### Architecture
-
 <img src="https://raw.githubusercontent.com/mdang/resources/master/ruby/rails/rails_architecture.png">
 
 ### Create a new application

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -2,7 +2,7 @@
 
 ### Architecture
 
-<img src="https://ga-students.slack.com/files/mattduncan/F0JHRFESK/screen_shot_2016-01-12_at_10.23.03_am.png">
+<img src="https://raw.githubusercontent.com/mdang/resources/master/ruby/rails/rails_architecture.png">
 
 ### Create a new application
 

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -1,5 +1,9 @@
 ## Ruby on Rails Cheatsheet
 
+### Architecture
+
+<img src="https://ga-students.slack.com/files/mattduncan/F0JHRFESK/screen_shot_2016-01-12_at_10.23.03_am.png">
+
 ### Create a new application
 
 Install the Rails gem if you haven't done so before

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -337,7 +337,7 @@ def new
 end
 ```
 ```rb
-<!-- ERB view -->
+# ERB view
 <%= form_for @photo, url: {action: "create"}, html: {class: "nifty_form"} do |f| %>
   <%= f.text_field :path %>
   <%= f.text_area :caption, size: "60x12" %>

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -328,7 +328,7 @@ Create a form with a custom action and method
 </form>
 ```
 
-Bind a form to a model 
+Bind a form to a model for creating/updating a resource
 
 ```rb
 # app/controllers/photos_controller.rb
@@ -337,13 +337,15 @@ def new
 end
 ```
 ```rb
+<!-- ERB view -->
 <%= form_for @photo, url: {action: "create"}, html: {class: "nifty_form"} do |f| %>
   <%= f.text_field :path %>
   <%= f.text_area :caption, size: "60x12" %>
   <%= f.submit "Create" %>
 <% end %>
 ```
 ```html
+<!-- HTML output -->
 <form accept-charset="UTF-8" action="/photos/create" method="post" class="nifty_form">
   <input id="photos_path" name="photo[path]" type="text" />
   <textarea id="photos_caption" name="photo[caption]" cols="60" rows="12"></textarea>

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -272,7 +272,7 @@ DELETE | /photos/:id | photos#destroy | photo_path(:id)
 
 ### Asset Pipeline
 
-Access images in the `public/assets/images` directory like this:
+Access images in the `app/assets/images` directory like this:
 
 ```html
 <%= image_tag "rails.png" %>

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -131,6 +131,8 @@ class CreatePhotos < ActiveRecord::Migration
 end
 ```
 
+Reference: http://guides.rubyonrails.org/active_model_basics.html
+
 ### Migrations
 
 Migration Data Types

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -98,6 +98,8 @@ Generate a new controller with default actions, routes and views
 $ rails g controller Photos index show
 ```
 
+Reference: http://guides.rubyonrails.org/action_controller_overview.html
+
 ### Models
 
 Generate a model and create a migration for the table

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -80,6 +80,8 @@ Create a route to a static view, without an action in the controller
 get 'photos/about', to: 'photos#about'
 ```
 
+Reference: http://guides.rubyonrails.org/routing.html
+
 ### Controllers
 
 Generate a new controller 

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -222,6 +222,8 @@ $ rake db:migrate
 
 Rollback the last migration performed
 
+**NOTE:** Be VERY careful with this command in production, it's destructive and you could potentially lose data. Make sure you absolutely understand what will happen when you run it 
+
 ```
 $ rake db:rollback
 ```

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -67,7 +67,7 @@ Create resources for only certain actions
 # config/routes.rb
 resources :photos, :only => [:index]
 
-# On flip side, you can create a resource with exceptions 
+# On the flip side, you can create a resource with exceptions 
 resources :photos, :except => [:new, :create, :edit, :update, :show, :destroy]
 ```
 

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -51,15 +51,15 @@ Automagically create all the routes for a RESTful resource
 resources :photos 
 ```
 
-HTTP Verb | Path | Controller#Action 
---------- | ---- | -----------------
-GET | /photos | photos#index
-GET | /photos_new | photos#new
-POST | /photos | photos#create
-GET | /photos/:id | photos#show
-GET | /photos/:id/edit | photos#edit
-PATCH/PUT | /photos/:id | photos#update
-DELETE | /photos/:id | photos#destroy
+HTTP Verb | Path | Controller#Action | Used for
+--------- | ---- | ----------------- | -------
+GET | /photos | photos#index | display a list of all photos
+GET | /photos_new | photos#new | return an HTML form for creating a new photo
+POST | /photos | photos#create | create a new photo
+GET | /photos/:id | photos#show | display a specific photo
+GET | /photos/:id/edit | photos#edit | return an HTML form for editing a photo
+PATCH/PUT | /photos/:id | photos#update | update a specific photo
+DELETE | /photos/:id | photos#destroy | delete a specific photo
 
 Create resources for only certain actions 
 

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -47,6 +47,7 @@ get 'photos/show', :to 'photos#show'
 Automagically create all the routes for a RESTful resource
 
 ```rb
+# config/routes.rb
 resources :photos 
 ```
 
@@ -60,6 +61,16 @@ GET | /photos/:id/edit | photos#edit
 PATCH/PUT | /photos/:id | photos#update
 DELETE | /photos/:id | photos#destroy
 
+Create resources for only certain actions 
+
+```rb
+# config/routes.rb
+resources :photos, :only => [:index]
+
+# On flip side, you can create a resource with exceptions 
+resources :photos, :except => [:new, :create, :edit, :update, :show, :destroy]
+```
+
 Create a route to a static view, without an action in the controller
 
 ```rb

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -66,7 +66,7 @@ Create a route to a static view, without an action in the controller
 # config/routes.rb
 # If there's a file called 'about.html.erb' in 'app/views/photos', this file will be 
 #   automatically rendered when you call localhost:3000/photos/about
-get "photos/about", to: 'photos#about'
+get 'photos/about', to: 'photos#about'
 ```
 
 ### Controllers

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -185,7 +185,7 @@ end
 ### Scaffolding
 
 ```
-$ rails g scaffold Photo title:text body:text image:text
+$ rails g scaffold Photo path:string caption:text
 $ rake db:migrate
 ```
 

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -272,6 +272,8 @@ rel="stylesheet" />
 <script src="/assets/application-908e25f4bf641868d8683022a5b62f54.js"></script>
 ```
 
+Reference: [http://guides.rubyonrails.org/asset_pipeline.html](http://guides.rubyonrails.org/asset_pipeline.html)
+
 ### Form Helpers
 
 Create a basic form that posts to itself
@@ -328,4 +330,6 @@ end
   <textarea id="photos_caption" name="photo[caption]" cols="60" rows="12"></textarea>
   <input name="commit" type="submit" value="Create" />
 </form>
-```
+```
+
+Reference: [http://guides.rubyonrails.org/form_helpers.html](http://guides.rubyonrails.org/form_helpers.html)
diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -324,8 +324,8 @@ end
 ```
 ```html
 <form accept-charset="UTF-8" action="/photos/create" method="post" class="nifty_form">
-  <input id="photos_title" name="photo[path]" type="text" />
-  <textarea id="photos_body" name="photo[caption]" cols="60" rows="12"></textarea>
+  <input id="photos_path" name="photo[path]" type="text" />
+  <textarea id="photos_caption" name="photo[caption]" cols="60" rows="12"></textarea>
   <input name="commit" type="submit" value="Create" />
 </form>
 ```
diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -305,4 +305,27 @@ Create a form with a custom action and method
   <input id="q" name="q" type="text" />
   <input name="commit" type="submit" value="Search" />
 </form>
+```
+
+Bind a form to a model 
+
+```rb
+# app/controllers/photos_controller.rb
+def new
+  @photo = Photo.new
+end
+```
+```rb
+<%= form_for @photo, url: {action: "create"}, html: {class: "nifty_form"} do |f| %>
+  <%= f.text_field :path %>
+  <%= f.text_area :caption, size: "60x12" %>
+  <%= f.submit "Create" %>
+<% end %>
+```
+```html
+<form accept-charset="UTF-8" action="/photos/create" method="post" class="nifty_form">
+  <input id="photos_title" name="photo[path]" type="text" />
+  <textarea id="photos_body" name="photo[caption]" cols="60" rows="12"></textarea>
+  <input name="commit" type="submit" value="Create" />
+</form>
 ```
diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -287,4 +287,22 @@ Create a basic form that posts to itself
   <input name="authenticity_token" type="hidden" value="J7CBxfHalt49OSHp27hblqK20c9PgwJ108nDHX/8Cts=" />
   Form contents
 </form>
+```
+
+Create a form with a custom action and method 
+
+```rb
+<%= form_tag("/search", method: "get") do %>
+  <%= label_tag(:q, "Search for:") %>
+  <%= text_field_tag(:q) %>
+  <%= submit_tag("Search") %>
+<% end %>
+```
+```html
+<form accept-charset="UTF-8" action="/search" method="get">
+  <input name="utf8" type="hidden" value="&#x2713;" />
+  <label for="q">Search for:</label>
+  <input id="q" name="q" type="text" />
+  <input name="commit" type="submit" value="Search" />
+</form>
 ```
diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -149,10 +149,27 @@ class AddDateTakenToPhotos < ActiveRecord::Migration[5.0]
 end
 ```
 
+You can also add a new column to a table with an index
+
+```
+$ rails g migration AddDateTakenToPhotos date_taken:datetime:index
+```
+
+The above command generates the following migration: 
+
+```rb
+class AddDateTakenToPhotos < ActiveRecord::Migration[5.0]
+  def change
+    add_column :photos, :date_taken, :datetime
+    add_index :photos, :date_taken
+  end
+end
+```
+
 The opposite goes for migration names following the format: `RemoveXXXFromYYY`
 
 ```
-$ rails g migration RemoveDateTakenFromPhotos part_number:datetime
+$ rails g migration RemoveDateTakenFromPhotos date_taken:datetime
 ```
 
 The above generates the following migration: 

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -149,6 +149,22 @@ class AddDateTakenToPhotos < ActiveRecord::Migration[5.0]
 end
 ```
 
+The opposite goes for migration names following the format: `RemoveXXXFromYYY`
+
+```
+$ rails g migration RemoveDateTakenFromPhotos part_number:datetime
+```
+
+The above generates the following migration: 
+
+```rb
+class RemoveDateTakenFromPhotos < ActiveRecord::Migration[5.0]
+  def change
+    remove_column :photos, :date_taken, :datetime
+  end
+end
+```
+
 ### Scaffolding
 
 ```

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -133,6 +133,22 @@ Migration Data Types
 * `:time`
 * `:timestamp`
 
+When the name of the migration follows the format `AddXXXToYYY` followed by a list of columns, it will add those columns to the existing table
+
+```
+$ rails g migration AddDateTakenToPhotos date_taken:datetime
+```
+
+The above creates the following migration: 
+
+```rb
+class AddDateTakenToPhotos < ActiveRecord::Migration[5.0]
+  def change
+    add_column :photos, :date_taken, :datetime
+  end
+end
+```
+
 ### Scaffolding
 
 ```

diff --git a/RAILS_CHEATSHEET.md b/RAILS_CHEATSHEET.md
@@ -160,6 +160,12 @@ Run any pending migrations
 $ rake db:migrate
 ```
 
+Rollback the last migration performed
+
+```
+$ rake db:rollback
+```
+
 ### Path Helpers 
 
 Creating a path helper for a route