PostgreSQL: support multiline default values. Closes #7533.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7801 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* PostgreSQL: support multiline default values.  #7533 [Carl Lerche, aguynamedryan, Rein Henrichs, Tarmo Tänav]
+
 * MySQL: fix change_column on not-null columns that don't accept dfeault values of ''.  #6663 [Jonathan Viney, Tarmo Tänav]
 
 * validates_uniqueness_of behaves well with single-table inheritance.  #3833 [Gabriel Gironda, rramdas, François Beausoleil, Josh Peek, Tarmo Tänav]

activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb

@@ -160,45 +160,45 @@ module ActiveRecord
         def self.extract_value_from_default(default)
           case default
             # Numeric types
-            when /^-?\d+(\.\d*)?$/
+            when /\A-?\d+(\.\d*)?\z/
               default
             # Character types
-            when /^'(.*)'::(?:character varying|bpchar|text)$/
+            when /\A'(.*)'::(?:character varying|bpchar|text)\z/m
               $1
             # Binary data types
-            when /^'(.*)'::bytea$/
+            when /\A'(.*)'::bytea\z/m
               $1
             # Date/time types
-            when /^'(.+)'::(?:time(?:stamp)? with(?:out)? time zone|date)$/
+            when /\A'(.+)'::(?:time(?:stamp)? with(?:out)? time zone|date)\z/
               $1
-            when /^'(.*)'::interval$/
+            when /\A'(.*)'::interval\z/
               $1
             # Boolean type
-            when /^true$/
+            when 'true'
               true
-            when /^false$/
+            when 'false'
               false
             # Geometric types
-            when /^'(.*)'::(?:point|line|lseg|box|"?path"?|polygon|circle)$/
+            when /\A'(.*)'::(?:point|line|lseg|box|"?path"?|polygon|circle)\z/
               $1
             # Network address types
-            when /^'(.*)'::(?:cidr|inet|macaddr)$/
+            when /\A'(.*)'::(?:cidr|inet|macaddr)\z/
               $1
             # Bit string types
-            when /^B'(.*)'::"?bit(?: varying)?"?$/
+            when /\AB'(.*)'::"?bit(?: varying)?"?\z/
               $1
             # XML type
-            when /^'(.*)'::xml$/
+            when /\A'(.*)'::xml\z/m
               $1
             # Arrays
-            when /^'(.*)'::"?\D+"?\[\]$/
+            when /\A'(.*)'::"?\D+"?\[\]\z/
               $1
             # Object identifier types
-            when /^-?\d+$/
+            when /\A-?\d+\z/
               $1
             else
               # Anything else is blank, some user type, or some function
-              # and we can't know the value of that, so return nil.            
+              # and we can't know the value of that, so return nil.
               nil
           end
         end

activerecord/test/defaults_test.rb

@@ -57,4 +57,10 @@ class DefaultTest < Test::Unit::TestCase
       assert_equal BigDecimal.new("2.78"), default.decimal_number
     end
   end
+
+  if current_adapter?(:PostgreSQLAdapter)
+    def test_multiline_default_text
+      assert_equal "--- []\n\n", Default.columns_hash['multiline_default'].default
+    end
+  end
 end

activerecord/test/fixtures/db_definitions/postgresql.sql

@@ -109,7 +109,8 @@ CREATE TABLE defaults (
     char3 text default 'a text field',
     positive_integer integer default 1,
     negative_integer integer default -1,
-    decimal_number decimal(3,2) default 2.78
+    decimal_number decimal(3,2) default 2.78,
+    multiline_default text DEFAULT E'--- []\n\n'::text
 );
 
 CREATE TABLE auto_id_tests (