Avoid Clobbering the Config's Pepper Value

README.md

@@ -96,7 +96,7 @@ default options.
 Hashid::Rails.configure do |config|
   # The salt to use for generating hashid. Prepended with pepper (table name).
   config.salt = ""
-  config.pepper = table_name
+  config.pepper = ->(klass) { klass.table_name }
 
   # The minimum length of generated hashids
   config.min_hash_length = 6

lib/hashid/rails.rb

@@ -41,10 +41,15 @@ def to_param
     module ClassMethods
       def hashid_config(options = {})
         config = Hashid::Rails.configuration.dup
-        config.pepper = table_name
+
         options.each do |attr, value|
           config.public_send("#{attr}=", value)
         end
+
+        if config.pepper.respond_to?(:call)
+          config.pepper = config.pepper.call(self)
+        end
+
         @hashid_configuration = config
       end
 

lib/hashid/rails/configuration.rb

@@ -13,7 +13,7 @@ class Configuration
 
       def initialize
         @salt = ""
-        @pepper = ""
+        @pepper = ->(klass) { klass.table_name }
         @min_hash_length = 6
         @alphabet = "abcdefghijklmnopqrstuvwxyz" \
                     "ABCDEFGHIJKLMNOPQRSTUVWXYZ" \

spec/hashid/rails_spec.rb

@@ -471,7 +471,7 @@
       config = Hashid::Rails.configuration
       aggregate_failures "default config" do
         expect(config.salt).to eq("")
-        expect(config.pepper).to eq("")
+        expect(config.pepper).to a_kind_of(Proc)
         expect(config.min_hash_length).to eq(6)
         expect(config.alphabet).to eq(
           "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"