The sql_type method called here is from

ActiveRecord::ConnectionAdapters::Column

See
https://github.com/rails/rails/blob/28b8ca766e3e7c6c43d3ae900c99f8377153c62/activerecord/lib/active_record/connection_adapters/column.rb#L16

2 files changed, 6 insertions, 7 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb
index f587bf8140..cdf0cbe218 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb
@@ -5,7 +5,7 @@ module ActiveRecord
     # The goal of this module is to move Adapter specific column
     # definitions to the Adapter instead of having it in the schema
     # dumper itself. This code represents the normal case.
-    # We can then redefine how certain data types may be handled in the schema dumper on the 
+    # We can then redefine how certain data types may be handled in the schema dumper on the
     # Adapter level by over-writing this code inside the database specific adapters
     module ColumnDumper
       def column_spec(column, types)
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb b/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb
index 61e5e76f83..635e60ad18 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb
@@ -83,10 +83,9 @@ module ActiveRecord
         def type_cast(value, column, array_member = false)
           return super(value, column) unless column
 
-          sql_type = type_to_sql(column.type, column.limit, column.precision, column.scale)
           case value
           when Range
-            return super(value, column) unless /range$/ =~ sql_type
+            return super(value, column) unless /range$/ =~ column.sql_type
             PostgreSQLColumn.range_to_string(value)
           when NilClass
             if column.array && array_member
@@ -97,23 +96,23 @@ module ActiveRecord
               super(value, column)
             end
           when Array
-            case sql_type
+            case column.sql_type
             when 'point' then PostgreSQLColumn.point_to_string(value)
             else
               return super(value, column) unless column.array
               PostgreSQLColumn.array_to_string(value, column, self)
             end
           when String
-            return super(value, column) unless 'bytea' == sql_type
+            return super(value, column) unless 'bytea' == couln.sql_type
             { :value => value, :format => 1 }
           when Hash
-            case sql_type
+            case column.sql_type
             when 'hstore' then PostgreSQLColumn.hstore_to_string(value)
             when 'json' then PostgreSQLColumn.json_to_string(value)
             else super(value, column)
             end
           when IPAddr
-            return super(value, column) unless ['inet','cidr'].include? sql_type
+            return super(value, column) unless ['inet','cidr'].include? column.sql_type
             PostgreSQLColumn.cidr_to_string(value)
           else
             super(value, column)