Push default_function to superclass to avoid method check

activerecord/lib/active_record/connection_adapters/column.rb

@@ -13,7 +13,7 @@ module Format
         ISO_DATETIME = /\A(\d{4})-(\d\d)-(\d\d) (\d\d):(\d\d):(\d\d)(\.\d+)?\z/
       end
 
-      attr_reader :name, :default, :type, :limit, :null, :sql_type, :precision, :scale
+      attr_reader :name, :default, :type, :limit, :null, :sql_type, :precision, :scale, :default_function
       attr_accessor :primary, :coder
 
       alias :encoded? :coder
@@ -27,16 +27,17 @@ module Format
       # It will be mapped to one of the standard Rails SQL types in the <tt>type</tt> attribute.
       # +null+ determines if this column allows +NULL+ values.
       def initialize(name, default, sql_type = nil, null = true)
-        @name      = name
-        @sql_type  = sql_type
-        @null      = null
-        @limit     = extract_limit(sql_type)
-        @precision = extract_precision(sql_type)
-        @scale     = extract_scale(sql_type)
-        @type      = simplified_type(sql_type)
-        @default   = extract_default(default)
-        @primary   = nil
-        @coder     = nil
+        @name             = name
+        @sql_type         = sql_type
+        @null             = null
+        @limit            = extract_limit(sql_type)
+        @precision        = extract_precision(sql_type)
+        @scale            = extract_scale(sql_type)
+        @type             = simplified_type(sql_type)
+        @default          = extract_default(default)
+        @default_function = nil
+        @primary          = nil
+        @coder            = nil
       end
 
       # Returns +true+ if the column is either of type string or text.

activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb

@@ -45,19 +45,21 @@ def postgresql_connection(config)
   module ConnectionAdapters
     # PostgreSQL-specific extensions to column definitions in a table.
     class PostgreSQLColumn < Column #:nodoc:
-      attr_accessor :array, :default_function
+      attr_accessor :array
       # Instantiates a new PostgreSQL column definition in a table.
       def initialize(name, default, oid_type, sql_type = nil, null = true)
         @oid_type = oid_type
         default_value     = self.class.extract_value_from_default(default)
-        @default_function = default if !default_value && default && default =~ /.+\(.*\)/
+
         if sql_type =~ /\[\]$/
           @array = true
           super(name, default_value, sql_type[0..sql_type.length - 3], null)
         else
           @array = false
           super(name, default_value, sql_type, null)
         end
+
+        @default_function = default if !default_value && default && default =~ /.+\(.*\)/
       end
 
       # :stopdoc:
@@ -434,7 +436,7 @@ def adapter_name
       def prepare_column_options(column, types)
         spec = super
         spec[:array] = 'true' if column.respond_to?(:array) && column.array
-        spec[:default] = "\"#{column.default_function}\"" if column.respond_to?(:default_function) && column.default_function
+        spec[:default] = "\"#{column.default_function}\"" if column.default_function
         spec
       end
 

activerecord/lib/active_record/schema_dumper.rb

@@ -112,7 +112,7 @@ def table(table, stream)
               tbl.print %Q(, primary_key: "#{pk}")
             elsif pkcol.sql_type == 'uuid'
               tbl.print ", id: :uuid"
-              tbl.print %Q(, default: "#{pkcol.default_function}") if pkcol.respond_to?(:default_function) && pkcol.default_function
+              tbl.print %Q(, default: "#{pkcol.default_function}") if pkcol.default_function
             end
           else
             tbl.print ", id: false"