Why doesn't MyModel.all.each{|m| m.destroy} work as expected?

I want to clear a table in my railsapp 开发者_JAVA百科, without dropping the database and migrating...

 MyModel.all.each{|m| m.destroy} 

I would expect this code to delete every record in the my_model table, but this is not happening... using Rails 2.3.4 + MySQL 5.1

EDIT: the issue was based on the plugin better_nested_set which didn't allow me to delete the entries in that order

MyModel.delete_all worked on the other hand , maybe because it executes truncate on the database (?)

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Use MyModel.destroy_all to delete all the records for your model.