add support for Rails 6.1

lib/hstore_accessor.rb

@@ -2,7 +2,9 @@
 require "active_record"
 require "hstore_accessor/version"
 
-if ::ActiveRecord::VERSION::STRING.to_f >= 5.0
+if ::ActiveRecord::VERSION::STRING.to_f >= 6.1
+  require "hstore_accessor/active_record_6.1/type_helpers"
+elsif ::ActiveRecord::VERSION::STRING.to_f >= 5.0
   require "hstore_accessor/active_record_5.0/type_helpers"
 elsif ::ActiveRecord::VERSION::STRING.to_f >= 4.2 && ::ActiveRecord::VERSION::STRING.to_f < 5.0
   require "hstore_accessor/active_record_4.2/type_helpers"

lib/hstore_accessor/active_record_6.1/type_helpers.rb

@@ -0,0 +1,38 @@
+module HstoreAccessor
+  module TypeHelpers
+    TYPES = {
+      boolean: ActiveRecord::Type::Boolean,
+      date: ActiveRecord::Type::Date,
+      datetime: ActiveRecord::Type::DateTime,
+      decimal: ActiveRecord::Type::Decimal,
+      float: ActiveRecord::Type::Float,
+      integer: ActiveRecord::Type::Integer,
+      string: ActiveRecord::Type::String
+    }
+
+    TYPES.default = ActiveRecord::Type::Value
+
+    class << self
+      def column_type_for(attribute, data_type)
+        cast_type = TYPES[data_type].new # see https://stackoverflow.com/a/73312053
+        sql_type_metadata = ActiveRecord::ConnectionAdapters::SqlTypeMetadata.new(
+          sql_type: cast_type.type.to_s, type: cast_type.type, limit: cast_type.limit,
+          precision: cast_type.precision, scale: cast_type.scale)
+        ActiveRecord::ConnectionAdapters::Column.new(attribute.to_s, sql_type_metadata)
+      end
+
+      def cast(type, value)
+        return nil if value.nil?
+
+        case type
+        when :string, :decimal
+          value
+        when :integer, :float, :datetime, :date, :boolean
+          TYPES[type].new.cast(value)
+        else value
+          # Nothing.
+        end
+      end
+    end
+  end
+end