Add geometric type for postgresql adapter. Closes #2233.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2498 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

 *SVN*
 
+* Add geometric type for postgresql adapter. #2233 [akaspick@gmail.com]
+
 * Add option (true by default) to generate reader methods for each attribute of a record to avoid the overhead of calling method missing. In partial fullfilment of #1236. [skaes@web.de]
 
 * Add convenience predicate methods on Column class. In partial fullfilment of #1236. [skaes@web.de]

activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb

@@ -354,6 +354,8 @@ def translate_field_type(field_type)
             when /^timestamp/i    then 'datetime'
             when /^real|^money/i  then 'float'
             when /^interval/i     then 'string'
+            # geometric types (the line type is currently not implemented in postgresql)
+            when /^point|lseg|box|path|polygon|circle/i  then 'string' 
             when /^bytea/i        then 'binary'
             else field_type       # Pass through standard types.
           end

activerecord/test/base_test.rb

@@ -718,6 +718,68 @@ def test_default
       assert_equal 'a varchar field', default.char2
       assert_equal 'a text field', default.char3
     end
+
+    class Geometric < ActiveRecord::Base; end
+    def test_geometric_content
+
+      # accepted format notes:
+      # ()'s aren't required
+      # values can be a mix of float or integer
+
+      g = Geometric.new(
+        :a_point        => '(5.0, 6.1)',
+        #:a_line         => '((2.0, 3), (5.5, 7.0))' # line type is currently unsupported in postgresql
+        :a_line_segment => '(2.0, 3), (5.5, 7.0)',
+        :a_box          => '2.0, 3, 5.5, 7.0',
+        :a_path         => '[(2.0, 3), (5.5, 7.0), (8.5, 11.0)]',  # [ ] is an open path
+        :a_polygon      => '((2.0, 3), (5.5, 7.0), (8.5, 11.0))',
+        :a_circle       => '<(5.3, 10.4), 2>'
+      )
+        
+      assert g.save
+
+      # Reload and check that we have all the geometric attributes.
+      h = Geometric.find(g.id)
+
+      assert_equal '(5,6.1)', h.a_point
+      assert_equal '[(2,3),(5.5,7)]', h.a_line_segment
+      assert_equal '(5.5,7),(2,3)', h.a_box   # reordered to store upper right corner then bottom left corner
+      assert_equal '[(2,3),(5.5,7),(8.5,11)]', h.a_path
+      assert_equal '((2,3),(5.5,7),(8.5,11))', h.a_polygon
+      assert_equal '<(5.3,10.4),2>', h.a_circle
+
+      # use a geometric function to test for an open path
+      objs = Geometric.find_by_sql ["select isopen(a_path) from geometrics where id = ?", g.id]
+      assert_equal objs[0].isopen, 't'
+
+      # test alternate formats when defining the geometric types
+      
+      g = Geometric.new(
+        :a_point        => '5.0, 6.1',
+        #:a_line         => '((2.0, 3), (5.5, 7.0))' # line type is currently unsupported in postgresql
+        :a_line_segment => '((2.0, 3), (5.5, 7.0))',
+        :a_box          => '(2.0, 3), (5.5, 7.0)',
+        :a_path         => '((2.0, 3), (5.5, 7.0), (8.5, 11.0))',  # ( ) is a closed path
+        :a_polygon      => '2.0, 3, 5.5, 7.0, 8.5, 11.0',
+        :a_circle       => '((5.3, 10.4), 2)'
+      )
+
+      assert g.save
+
+      # Reload and check that we have all the geometric attributes.
+      h = Geometric.find(g.id)
+      
+      assert_equal '(5,6.1)', h.a_point
+      assert_equal '[(2,3),(5.5,7)]', h.a_line_segment
+      assert_equal '(5.5,7),(2,3)', h.a_box   # reordered to store upper right corner then bottom left corner
+      assert_equal '((2,3),(5.5,7),(8.5,11))', h.a_path
+      assert_equal '((2,3),(5.5,7),(8.5,11))', h.a_polygon
+      assert_equal '<(5.3,10.4),2>', h.a_circle
+
+      # use a geometric function to test for an closed path
+      objs = Geometric.find_by_sql ["select isclosed(a_path) from geometrics where id = ?", g.id]
+      assert_equal objs[0].isclosed, 't'
+    end
   end
 
   def test_auto_id

activerecord/test/fixtures/db_definitions/postgresql.drop.sql

@@ -25,3 +25,4 @@ DROP TABLE categories_posts;
 DROP TABLE defaults;
 DROP TABLE fk_test_has_fk;
 DROP TABLE fk_test_has_pk;
+DROP TABLE geometrics;

activerecord/test/fixtures/db_definitions/postgresql.sql

@@ -207,3 +207,14 @@ CREATE TABLE fk_test_has_fk (
   id    INTEGER NOT NULL PRIMARY KEY,
   fk_id INTEGER NOT NULL REFERENCES fk_test_has_fk(id)
 );
+
+CREATE TABLE geometrics (
+  id serial primary key,
+  a_point point,
+  -- a_line line, (the line type is currently not implemented in postgresql)
+  a_line_segment lseg,
+  a_box box,
+  a_path path,
+  a_polygon polygon,
+  a_circle circle
+);