Tableless model in rails 3.1

Question

Looks like this method doesn\'t work anymore in rails 3.1. So, does someone have a working solution?

Actually, I\'ve found this gist. It solves problems with colum

Answer 1

This tableless thing seems more and more sort of a hack, but the mix just isn't the same thing (don't remember exactly what didn't work now, I've dealt with it some months ago, returned to it because upgrade to 3.1 broke it). The 3.1.0rc4 version worked with 'columns_hash' method override, the 3.1.0 requires also a 'column_defaults' override. So here's a version that passes my project tests.

class Tableless < ActiveRecord::Base
  def self.columns
    @columns ||= [];
  end

  def self.column(name, sql_type = nil, default = nil, null = true)
    columns << ActiveRecord::ConnectionAdapters::Column.new(name.to_s, default,
      sql_type.to_s, null)
  end

  def self.columns_hash
    @columns_hash ||= Hash[columns.map { |column| [column.name, column] }]
  end

  def self.column_names
    @column_names ||= columns.map { |column| column.name }
  end

  def self.column_defaults
    @column_defaults ||= columns.map { |column| [column.name, nil] }.inject({}) { |m, e| m[e[0]] = e[1]; m }
  end

  # Override the save method to prevent exceptions.
  def save(validate = true)
    validate ? valid? : true
  end
end

Hope it works for you,

-- José