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Ruby on Rails Cheatsheets
Rails Migrations Cheatsheet
Up and down methods, rake tasks, column mapping, loading fixtures, example migration file, all packed onto one A4 page for an easy at-a-glance reference. Updated for Rails 2.1
- Table Methods - migration methods for creating and updating tables
- Database mapping - how migration column types map to your underlying database
- Example migration - What a migration file looks like
- Rake tasks - a list of built-in migration-related Rake tasks
- Directory Structure - where migration files go
- Shortcut methods - various convenience methods
- Column Methods - methods that operate on database columns
- Index methods - methods for creating indexes
- Miscellaneous methods - other methods
- script/generate - generate a template migration file
- Loading fixtures - load fixtures into your database via a migration
Indexes
add_index
Creates an index for the specified column.
add_index :table_name, :column_name, :unique => true
remove_index
Remove an index from the specified column.
remove_index :table_name, :column_name
- Action Mailer
- Cheatsheets
- File Handling
- Helpers
- Migrations
- Models
- Regular Expressions
- Relationships
- RJS
- Routing and URLs
- Validations
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