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I am using Ruby 1.9.2, the Ruby on Rails v3.2.2 gem and the MySQL database. I would like to import data to the database from a CSV file containing world cities. I think this process should be made by running a RoR migration but I don’t know how to properly proceed.
In particular, I don’t know where (that is, in which directory relating my RoR application) I should put the CSV file and how to access that file from my migration file in order to add data to the database.
I do a lot of importing from csv files to the database. I place the csv files in the db folder. Then I create rake tasks so that I can simply call
For parsing the csv files I use the csv library – you have to set require ‘csv’. The importer are models in app/models. Here are some code snippets which show, how to do the import:
https://gist.github.com/4013876
I hope this helps for a start …