Created
November 11, 2014 16:36
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removes orphaned records
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model_base = Rails.root.join('app/models') | |
Dir[model_base.join('**/*.rb').to_s].each do |filename| | |
# get namespaces based on dir name | |
namespaces = (File.dirname(filename)[model_base.to_s.size+1..-1] || '').split('/').map{|d| d.camelize}.join('::') | |
# skip concerns folder | |
next if namespaces == "Concerns" | |
# get class name based on filename and namespaces | |
class_name = File.basename(filename, '.rb').camelize | |
klass = "#{namespaces}::#{class_name}".constantize | |
next unless klass.ancestors.include?(ActiveRecord::Base) | |
orphans = Hash.new | |
klass.reflect_on_all_associations(:belongs_to).each do |belongs_to| | |
assoc_name, field_name = belongs_to.name.to_s, belongs_to.foreign_key.to_s | |
if belongs_to.options[:polymorphic] | |
foreign_type_field = field_name.gsub('_id', '_type') | |
foreign_types = klass.unscoped.select("DISTINCT(#{foreign_type_field})") | |
foreign_types = foreign_types.collect { |r| r.send(foreign_type_field) } | |
foreign_types.sort.each do |foreign_type| | |
related_sql = foreign_type.constantize.unscoped.select(:id).to_sql | |
finder = klass.unscoped.where("#{foreign_type_field} = '#{foreign_type}'") | |
finder.where("#{field_name} NOT IN (#{related_sql})").each do |orphan| | |
orphans[orphan] ||= Array.new | |
orphans[orphan] << [assoc_name, field_name] | |
end | |
end | |
else | |
name = belongs_to.options[:class_name] || assoc_name | |
puts "######################### #{name}" | |
class_name = name.to_s.classify | |
related_sql = class_name.constantize.unscoped.select(:id).to_sql | |
finder = klass.unscoped | |
finder.where("#{field_name} NOT IN (#{related_sql})").each do |orphan| | |
orphans[orphan] ||= Array.new | |
orphans[orphan] << [assoc_name, field_name] | |
end | |
end | |
end | |
orphans.sort_by { |record, data| record.id }.each do |record, data| | |
found = true | |
data.sort_by(&:first).each do |assoc_name, field_name| | |
puts "#{record.class.name}##{record.id} #{field_name} is present, but #{assoc_name} doesn't exist" + (ENV['DELETE'] ? ' -- deleting' : '') | |
record.delete if ENV['DELETE'] | |
end | |
end | |
end |
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