Correctly parse bigint defaults in PostgreSQL

activerecord/CHANGELOG.md

@@ -1,5 +1,10 @@
 ## Rails 4.0.0 (unreleased) ##
 
+*   Default values for PostgreSQL bigint types now get parsed and dumped to the
+    schema correctly.
+
+    *Erik Peterson*
+
 *   `has_many` using `:through` now obeys the order clause mentioned in
     through association. Fixes #10016.
 

activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb

@@ -80,7 +80,7 @@ def self.extract_value_from_default(default)
           when /\A'(.*)'::(num|date|tstz|ts|int4|int8)range\z/m
             $1
           # Numeric types
-          when /\A\(?(-?\d+(\.\d*)?\)?)\z/
+          when /\A\(?(-?\d+(\.\d*)?\)?(::bigint)?)\z/
             $1
           # Character types
           when /\A\(?'(.*)'::.*\b(?:character varying|bpchar|text)\z/m

activerecord/test/cases/schema_dumper_test.rb

@@ -242,6 +242,11 @@ def test_schema_dump_includes_decimal_options
   end
 
   if current_adapter?(:PostgreSQLAdapter)
+    def test_schema_dump_includes_bigint_default
+      output = standard_dump
+      assert_match %r{t.integer\s+"bigint_default",\s+limit: 8,\s+default: 0}, output
+    end
+
     def test_schema_dump_includes_extensions
       connection = ActiveRecord::Base.connection
       skip unless connection.supports_extensions?

activerecord/test/schema/postgresql_specific_schema.rb

@@ -32,6 +32,7 @@
     char3 text default 'a text field',
     positive_integer integer default 1,
     negative_integer integer default -1,
+    bigint_default bigint default 0::bigint,
     decimal_number decimal(3,2) default 2.78,
     multiline_default text DEFAULT '--- []