Upgrade ruby 3.2.12.
Use in memory sqlite3 database when test.
'_type' is obsolete on mongoid 3.1
Prepare Gemfile.rails-3.2
Prepare Gemfile.rails-edge
Remove deprecation warnig
Use rails 3.2 and upgrade gems.
ActiveRelation.load is no longer used.
Begin to create import.
Refactoring
csv_import can use block.
csv_import can accept fields option.
import add blank line test.
csv_import can skip line if block returns false.
Refactoring.
csv import use transaction.
import can only all accept.
Refactoring.
csv_import can accept not a column.
CsvRails::Import also use tsv.