У меня есть список комментариев, хранящихся в базе данных.Я могу извлечь комментарий из базы данных и манипулировать им, однако я получаю ошибку, когда пытаюсь обновить базу данных снова через datamapper.
Я получаю следующую ошибку:
/usr/local/lib/ruby/gems/1.9.1/gems/dm-core-1.1.0/lib/dm-core/resource/state/immutable.rb:16:in `set': Immutable resource cannot be modified (DataMapper::ImmutableError)
from /usr/local/lib/ruby/gems/1.9.1/gems/dm-core-1.1.0/lib/dm-core/model/property.rb:238:in `body='
from /usr/local/lib/ruby/gems/1.9.1/gems/dm-core-1.1.0/lib/dm-core/resource.rb:334:in `block in attributes='
from /usr/local/lib/ruby/gems/1.9.1/gems/dm-core-1.1.0/lib/dm-core/resource.rb:330:in `each'
from /usr/local/lib/ruby/gems/1.9.1/gems/dm-core-1.1.0/lib/dm-core/resource.rb:330:in `attributes='
from /usr/local/lib/ruby/gems/1.9.1/gems/dm-core-1.1.0/lib/dm-core/resource.rb:379:in `update'
from /usr/local/lib/ruby/gems/1.9.1/gems/dm-validations-1.1.0/lib/dm-validations.rb:75:in `block in update'
from /usr/local/lib/ruby/gems/1.9.1/gems/dm-validations-1.1.0/lib/dm-validations/support/context.rb:30:in `validation_context'
from /usr/local/lib/ruby/gems/1.9.1/gems/dm-validations-1.1.0/lib/dm-validations.rb:75:in `update'
from process.rb:32:in `block (2 levels) in <main>'
from process.rb:28:in `each_line'
from process.rb:28:in `block in <main>'
from /usr/local/lib/ruby/gems/1.9.1/gems/dm-core-1.1.0/lib/dm-core/collection.rb:507:in `block in each'
from /usr/local/lib/ruby/gems/1.9.1/gems/dm-core-1.1.0/lib/dm-core/support/lazy_array.rb:411:in `block in each'
from /usr/local/lib/ruby/gems/1.9.1/gems/dm-core-1.1.0/lib/dm-core/support/lazy_array.rb:411:in `each'
from /usr/local/lib/ruby/gems/1.9.1/gems/dm-core-1.1.0/lib/dm-core/support/lazy_array.rb:411:in `each'
from /usr/local/lib/ruby/gems/1.9.1/gems/dm-core-1.1.0/lib/dm-core/collection.rb:504:in `each'
from process.rb:27:in `<main>'
А вот код:
comments.each do |comment|
comment.body.each_line do |comment_line|
comment_line = comment_line.lstrip
if comment_line[0]== '>'
new_comment = comment.body.slice! comment_line
comment.update(:body => new_comment)
comment.save
end
end
end
Что я делаю не так?