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Contents
module Fiona7
class TableSwitcher
attr_accessor :klass, :table_suffix, :table_prefix, :table_name
def initialize(klass, table_suffix)
self.klass = klass
self.table_prefix = klass.table_name_prefix
self.table_suffix = table_suffix
self.table_name = "#{self.table_prefix}#{self.table_suffix}"
end
def switch
if klass.table_name != self.table_name
value = self.table_name
klass_name = klass.name
Rails.logger.debug "Switching table name to #{value} on #{self.klass.name}"
# TODO: cache values for two modes somehow? (to improve performance)
# NOTE: we abuse the fact that the two tables have identical schemes
# and only swap out the table name sneakly, skipping DB schema lookup
# and also reloading of attributes, which can break the app
# (by removing primary key accessor :id)
klass.instance_eval do
connection.clear_cache!
@table_name = value
@quoted_table_name = nil
@arel_table = nil
@sequence_name = nil unless defined?(@explicit_sequence_name) && @explicit_sequence_name
@relation = ActiveRecord::Relation.create(self, arel_table)
if self == Fiona7::WriteObj
# reset associations, otherwise they go out of sync
has_many :children, :class_name => 'RailsConnector::AbstractObj', :foreign_key => 'parent_obj_id'
belongs_to :parent, :class_name => 'RailsConnector::AbstractObj', :foreign_key => 'parent_obj_id'
end
end
end
end
end
end
Version data entries
23 entries across 23 versions & 1 rubygems