Skip JSON escaping when writing into JSON columns

This extra escaping is only needed if the JSON end up included
in a `<script>` tag, so entirely unnecessary when writing into
a database column.

Author: byroot

activerecord/lib/active_record/coders/json.rb

@@ -1,14 +1,19 @@
 # frozen_string_literal: true
 
+require "active_support/json"
+
 module ActiveRecord
   module Coders # :nodoc:
     class JSON # :nodoc:
-      def initialize(options = {})
-        @options = options
+      DEFAULT_OPTIONS = { escape: false }.freeze
+
+      def initialize(options = nil)
+        @options = options ? DEFAULT_OPTIONS.merge(options) : DEFAULT_OPTIONS
+        @encoder = ActiveSupport::JSON::Encoding.json_encoder.new(options)
       end
 
       def dump(obj)
-        ActiveSupport::JSON.encode(obj)
+        @encoder.encode(obj)
       end
 
       def load(json)

activerecord/lib/active_record/type/json.rb

@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require "active_support/json"
+
 module ActiveRecord
   module Type
     class Json < ActiveModel::Type::Value
@@ -14,8 +16,10 @@ def deserialize(value)
         ActiveSupport::JSON.decode(value) rescue nil
       end
 
+      JSON_ENCODER = ActiveSupport::JSON::Encoding.json_encoder.new(escape: false)
+
       def serialize(value)
-        ActiveSupport::JSON.encode(value) unless value.nil?
+        JSON_ENCODER.encode(value) unless value.nil?
       end
 
       def changed_in_place?(raw_old_value, new_value)