Contents

module HoboFields
  module Model

    class IndexSpec

      def initialize(model, fields, options={})
        @model = model
        self.table = options.delete(:table_name) || model.table_name
        self.fields = Array.wrap(fields).*.to_s
        self.name = options.delete(:name) || model.connection.index_name(self.table, :column => self.fields)
        self.unique = options.delete(:unique) || false
      end

      attr_accessor :table, :fields, :name, :unique

      # extract IndexSpecs from an existing table
      def self.for_model(model, old_table_name=nil)
        t = old_table_name || model.table_name
        model.connection.indexes(t).map do |i|
          self.new(model, i.columns, :name => i.name, :unique => i.unique, :table_name => old_table_name) unless model.ignore_indexes.include?(i.name)
        end.compact
      end

      def default_name?
        name == @model.connection.index_name(table, :column => fields)
      end

      def to_add_statement(new_table_name)
        r = "add_index :#{new_table_name}, #{fields.*.to_sym.inspect}"
        r += ", :unique => true" if unique
        r += ", :name => '#{name}'" unless default_name?
        r
      end

      def hash
        [table, fields, name, unique].hash
      end

      def ==(v)
        v.hash == hash
      end
      alias_method :eql?, :==

    end

  end
end

Version data entries

23 entries across 23 versions & 1 rubygems

Version	Path
hobo_fields-1.3.0.pre12	lib/hobo_fields/model/index_spec.rb
hobo_fields-1.3.0.pre11	lib/hobo_fields/model/index_spec.rb
hobo_fields-1.3.0.pre10	lib/hobo_fields/model/index_spec.rb