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Versions: 23
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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