cdesch · September 2, 2025 19:45 · Jun 28, 2019 · Jun 28, 2019 · Sep 26, 2017 · Sep 18, 2017
diff --git a/rails_generator_cheat_sheet.md b/rails_generator_cheat_sheet.md
@@ -16,6 +16,11 @@ You can get all of this information on the command line.
 #### Generate Models
 	rails generate model Post title:string body:text published:boolean
 
+#### Scaffold with ERB and API namespaced to /api/v1
+
+        rails g scaffold categories name:string image:string description:text status:boolean  -c=scaffold_controller
+        rails g scaffold_controller api/v1/categories name:string image:string description:text status:boolean  --api --model-name=Category
+
 #### Add Column to Existing Model
 	rails generate migration AddFieldToModel field:type
 

diff --git a/rails_generator_cheat_sheet.md b/rails_generator_cheat_sheet.md
@@ -22,10 +22,6 @@ You can get all of this information on the command line.
 #### Column Types
 	:primary_key, :string, :text, :integer, :float, :decimal, :datetime, :timestamp, :time, :date, :binary, :boolean
 
-#### Adding a Unique Property to a Field
-
-	rails generate scaffold Post name:string title:string content:text slug:string:uniq
-
 #### Adding a Unique Property to a Field
 
 	rails generate scaffold Post name:string title:string content:text slug:string:uniq

diff --git a/rails_generator_cheat_sheet.md b/rails_generator_cheat_sheet.md
@@ -30,6 +30,26 @@ You can get all of this information on the command line.
 
 	rails generate scaffold Post name:string title:string content:text slug:string:uniq
 
+#### Many to Many Relationship ([Reference](https://stackoverflow.com/questions/5322067/generating-a-model-with-many-to-many-in-ruby-on-rails))
+
+Remember that you do not want an id for the join table, so make sure to add :id => false |t|
+```
+create_table assemblies_parts, :id => false do |t|
+  t.integer :assembly_id
+  t.integer :part_id
+end
+```
+
+If you use rails
+```
+rails generate model Assemblies_parts assembly:references part:references
+```
+you will have two indexes, but what you want is
+```
+add_index :assemblies_parts, [:assembly_id, :part_id], :unique => true
+```
+For Rails 5 use create_join_table instead.
+
 #### Adding Modifiers ([Reference](http://www.chrisjmendez.com/2016/07/01/rails-cheatsheet/))
 
 Modifiers are inserted through curly braces and they allow you to include things such as null and limit.

diff --git a/rails_generator_cheat_sheet.md b/rails_generator_cheat_sheet.md
@@ -111,7 +111,7 @@ You can also manually update the migration file prior to running rake db:migrate
 
 	add_column :tweet, :retweets_count, :integer, :null => false, :default => 0
 
-... and read Rails API
+... and read [Rails API](http://api.rubyonrails.org/)
 
 ## Rspec Generators
  [Documentation](https://relishapp.com/rspec/rspec-rails/docs/generators)

diff --git a/rails_generator_cheat_sheet.md b/rails_generator_cheat_sheet.md
@@ -103,6 +103,16 @@ Suppose your building a collaborative app (like Pivotal Tracker and you want to
 
 	rails g model Comment body:text commentable:references{polymorphic}:index  
 
+### Column Defaults ([Reference](https://stackoverflow.com/questions/6167994/assigning-default-value-while-creating-migration-file))
+
+Default migration generator does not handle default values (column modifiers are supported but do not include default or null), but you could create your own generator.
+
+You can also manually update the migration file prior to running rake db:migrate by adding the options to add_column:
+
+	add_column :tweet, :retweets_count, :integer, :null => false, :default => 0
+
+... and read Rails API
+
 ## Rspec Generators
  [Documentation](https://relishapp.com/rspec/rspec-rails/docs/generators)
 

diff --git a/rails_generator_cheat_sheet.md b/rails_generator_cheat_sheet.md
@@ -1,3 +1,5 @@
+Cheat Sheets are greate but they are not a substitute for learning the framework and reading the documentation as we most certainly have not covered every potential example here. Please refer to the [Rails Command Line Docs](http://guides.rubyonrails.org/command_line.html) for more information.
+
 ## Command Line Generator Info
 
 [Reference](https://stackoverflow.com/questions/12900170/is-there-a-reference-cheat-sheet-for-rails-generate-command)

diff --git a/rails_generator_cheat_sheet.md b/rails_generator_cheat_sheet.md
@@ -95,6 +95,12 @@ class CreateProducts < ActiveRecord::Migration
 end
 ```
 
+### Polymorphism ([Reference](http://www.chrisjmendez.com/2016/07/01/rails-cheatsheet/))
+
+Suppose your building a collaborative app (like Pivotal Tracker and you want to add comments to projects, tasks, and attachments. You can do that by making comments polymorphic.
+
+	rails g model Comment body:text commentable:references{polymorphic}:index  
+
 ## Rspec Generators
  [Documentation](https://relishapp.com/rspec/rspec-rails/docs/generators)
 

diff --git a/rails_generator_cheat_sheet.md b/rails_generator_cheat_sheet.md
@@ -28,7 +28,7 @@ You can get all of this information on the command line.
 
 	rails generate scaffold Post name:string title:string content:text slug:string:uniq
 
-#### Adding Modifiers [Reference](http://www.chrisjmendez.com/2016/07/01/rails-cheatsheet/)
+#### Adding Modifiers ([Reference](http://www.chrisjmendez.com/2016/07/01/rails-cheatsheet/))
 
 Modifiers are inserted through curly braces and they allow you to include things such as null and limit.
 
@@ -55,9 +55,8 @@ class CreateProducts < ActiveRecord::Migration
 end
 ```
 
-
 
-#### Create a new model with a reference to another model [Reference](https://www.ralfebert.de/snippets/ruby-rails/models-tables-migrations-cheat-sheet/) 
+#### Create a new model with a reference to another model ([Reference](https://www.ralfebert.de/snippets/ruby-rails/models-tables-migrations-cheat-sheet/))
 
 	rails g model Supplier name:string
 	rails g model Product name:string:index sku:string{10}:uniq count:integer description:text supplier:references popularity:float 'price:decimal{10,2}' available:boolean availableSince:datetime image:binary	

diff --git a/rails_generator_cheat_sheet.md b/rails_generator_cheat_sheet.md
@@ -20,7 +20,83 @@ You can get all of this information on the command line.
 #### Column Types
 	:primary_key, :string, :text, :integer, :float, :decimal, :datetime, :timestamp, :time, :date, :binary, :boolean
 
-## Rspec Genorators
+#### Adding a Unique Property to a Field
+
+	rails generate scaffold Post name:string title:string content:text slug:string:uniq
+
+#### Adding a Unique Property to a Field
+
+	rails generate scaffold Post name:string title:string content:text slug:string:uniq
+
+#### Adding Modifiers [Reference](http://www.chrisjmendez.com/2016/07/01/rails-cheatsheet/)
+
+Modifiers are inserted through curly braces and they allow you to include things such as null and limit.
+
+Add an age to a Friend with a limit
+
+	rails g model friend age:integer{2}  
+
+Add a price to a product with 2 decimals
+
+	rails g model product 'price:decimal{10,2}'  	
+
+Would result in a migration with a `scale` of `2` and `percision` of `10`
+
+```
+class CreateProducts < ActiveRecord::Migration
+  def change
+    create_table :products do |t|
+      ...
+      t.decimal :price, precision: 10, scale: 2
+      ...
+      t.timestamps null: false
+    end
+  end
+end
+```
+
+
+
+#### Create a new model with a reference to another model [Reference](https://www.ralfebert.de/snippets/ruby-rails/models-tables-migrations-cheat-sheet/) 
+
+	rails g model Supplier name:string
+	rails g model Product name:string:index sku:string{10}:uniq count:integer description:text supplier:references popularity:float 'price:decimal{10,2}' available:boolean availableSince:datetime image:binary	
+
+Resulting migrations:
+```
+class CreateSuppliers < ActiveRecord::Migration
+  def change
+    create_table :suppliers do |t|
+      t.string :name
+
+      t.timestamps null: false
+    end
+  end
+end
+
+class CreateProducts < ActiveRecord::Migration
+  def change
+    create_table :products do |t|
+      t.string :name
+      t.string :sku, limit: 10
+      t.integer :count
+      t.text :description
+      t.references :supplier, index: true, foreign_key: true
+      t.float :popularity
+      t.decimal :price, precision: 10, scale: 2
+      t.boolean :available
+      t.datetime :availableSince
+      t.binary :image
+
+      t.timestamps null: false
+    end
+    add_index :products, :name
+    add_index :products, :sku, unique: true
+  end
+end
+```
+
+## Rspec Generators
  [Documentation](https://relishapp.com/rspec/rspec-rails/docs/generators)
 
     rails generate rspec:model widget

diff --git a/rails_generator_cheat_sheet.md b/rails_generator_cheat_sheet.md
@@ -1,4 +1,24 @@
-## Scaffolding
+## Command Line Generator Info
+
+[Reference](https://stackoverflow.com/questions/12900170/is-there-a-reference-cheat-sheet-for-rails-generate-command)
+
+You can get all of this information on the command line.
+
+`rails generate` with no generator name will output a list of all available generators and some information about global options.
+`rails generate GENERATOR --help` will list the options that can be passed to the specified generator.
+
+## Rails Generate Examples
+#### Create a Resource
+	rails generate scaffold Post name:string title:string content:text
+
+#### Generate Models
+	rails generate model Post title:string body:text published:boolean
+
+#### Add Column to Existing Model
+	rails generate migration AddFieldToModel field:type
+
+#### Column Types
+	:primary_key, :string, :text, :integer, :float, :decimal, :datetime, :timestamp, :time, :date, :binary, :boolean
 
 ## Rspec Genorators
  [Documentation](https://relishapp.com/rspec/rspec-rails/docs/generators)

diff --git a/rails_generator_cheat_sheet.md b/rails_generator_cheat_sheet.md
@@ -0,0 +1,31 @@
+## Scaffolding
+
+## Rspec Genorators
+ [Documentation](https://relishapp.com/rspec/rspec-rails/docs/generators)
+
+    rails generate rspec:model widget
+
+will create a new spec file in `spec/models/widget_spec.rb`
+
+The same generator pattern is available for all specs:
+```
+scaffold
+model
+controller
+helper
+view
+mailer
+observer
+integration
+feature
+job
+```
+Generating specific views
+```
+rails g rspec:view widget index edit new show
+      create  spec/views/widget
+      create  spec/views/widget/index.html.erb_spec.rb
+      create  spec/views/widget/edit.html.erb_spec.rb
+      create  spec/views/widget/new.html.erb_spec.rb
+      create  spec/views/widget/show.html.erb_spec.rb
+```