Usage
Add to your Gemfile:
gem 'csv_validator'Run:
bundle install
Then add the following to your model:
attr_accessor :my_csv_file
validates :my_csv_file, :csv => trueThis will check to see if it is a properly formed CSV file.
In this case, csv_validator expects :my_csv_file to be an instance of ActionDispatch::Http::UploadedFile, which is created by default for Rails uploads.
Other validation options
There are a handful of other options for more specific validation too. A complete list is below... note that you wouldn't use all simultaneously.
validates :my_csv_file, :csv => {
:columns => 3, # an exact number of columns
:max_columns => 10, # a maximum number of columns
:min_columns => 1, # a minimum number of columns
:rows => 20, # an exact number of rows
:max_rows => 30, # a maximum number of rows
:min_rows => 2, # a minimum number of rows
:email => 0, # will check to make sure all emails in specified column are valid email addresses
:numericality => 0, # will check to make sure all values in specified column are numerical
}