Make blank params[] nil

Question

When a user submits a form and leaves certain fields blank, they get saved as blank in the DB. I would like to iterate through the params[:user] collection (for example) an

Answer 1

Chris,

Here is a recursive parsing of params that have blanc values.

before_filter :process_params

......



private
def process_params
....
  set_blanc_values_to_nil(params)
end

# Maybe move method to ApplicationController
# recursively sets all blanc values to nil
def set_blanc_values_to_nil!(my_hash)
    my_hash.keys.each do |key|
        val = my_hash[key]
        next if val.nil?
        my_hash[key] = nil if val.is_a?(String) && val.empty?
        set_blanc_values_to_nil!(val) if val.is_a? Hash
    end
end