Configuration item `config.filter_parameters` could also filter out sensitive value of database column when call `#inspect`

* Why
Some sensitive data will be exposed in log accidentally by calling `#inspect`, e.g.

```ruby
@account = Account.find params[:id]
payload = { account: @account }
logger.info "payload will be #{ payload }"
```

All the information of `@account` will be exposed in log.

* Solution
Add a class attribute filter_attributes to specify which values of columns shouldn't be exposed.
This attribute equals to `Rails.application.config.filter_parameters` by default.

```ruby
Rails.application.config.filter_parameters += [:credit_card_number]
Account.last.insepct # => #<Account id: 123, credit_card_number: [FILTERED] ...>
```

1 files changed, 6 insertions, 0 deletions

diff --git a/activerecord/lib/active_record/railtie.rb b/activerecord/lib/active_record/railtie.rb
index 7ece083fd4..47351588d3 100644
--- a/activerecord/lib/active_record/railtie.rb
+++ b/activerecord/lib/active_record/railtie.rb
@@ -235,5 +235,11 @@ MSG
         end
       end
     end
+
+    initializer "active_record.set_filter_attributes" do
+      ActiveSupport.on_load(:active_record) do
+        self.filter_attributes += Rails.application.config.filter_parameters
+      end
+    end
   end
 end