Sean Hill questions

Sean Hill answers

• Find all records that don't have any of an associated model
• before_filter not inheriting from parent controller correctly?
• Rails: Is it possible to select has_many association column id as array
• Geokit issue - "could not find generator"
• Rails Activerecord multiple table includes
• How does Rails populate the "model_type" field for polymorphic associations?
• Post.count to_sql in Rails3?
• Convert string to hexadecimal in Ruby
• Many-to-many Users and groups, but groups have owners
• Grouping by Days Created_At