From 0e98ef149cd44dc04d40a8553e1743c5cb6d4a7c Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Mon, 20 Sep 2010 16:23:23 -0700
Subject: supporting ranges for IN statements

---
 lib/arel/attributes/attribute.rb | 16 +++++++++++++---
 lib/arel/nodes.rb                |  2 ++
 lib/arel/nodes/between.rb        |  6 ++++++
 lib/arel/nodes/less_than.rb      |  6 ++++++
 lib/arel/visitors/to_sql.rb      |  8 ++++++++
 5 files changed, 35 insertions(+), 3 deletions(-)
 create mode 100644 lib/arel/nodes/between.rb
 create mode 100644 lib/arel/nodes/less_than.rb

(limited to 'lib')

diff --git a/lib/arel/attributes/attribute.rb b/lib/arel/attributes/attribute.rb
index 6bb880d211..e1f7fd81d2 100644
--- a/lib/arel/attributes/attribute.rb
+++ b/lib/arel/attributes/attribute.rb
@@ -12,10 +12,20 @@ module Arel
       end
 
       def in other
-        if Arel::SelectManager === other
-          other = other.to_a.map { |x| x.id }
+        case other
+        when Arel::SelectManager
+          Nodes::In.new self, other.to_a.map { |x| x.id }
+        when Range
+          if other.exclude_end?
+            left  = Nodes::GreaterThanOrEqual.new(self, other.min)
+            right = Nodes::LessThan.new(self, other.max + 1)
+            Nodes::And.new left, right
+          else
+            Nodes::Between.new(self, Nodes::And.new(other.min, other.max))
+          end
+        else
+          Nodes::In.new self, other
         end
-        Nodes::In.new self, other
       end
 
       def gteq right
diff --git a/lib/arel/nodes.rb b/lib/arel/nodes.rb
index ac4bba57c2..fade666ff7 100644
--- a/lib/arel/nodes.rb
+++ b/lib/arel/nodes.rb
@@ -1,12 +1,14 @@
 require 'arel/nodes/node'
 require 'arel/nodes/binary'
 require 'arel/nodes/equality'
+require 'arel/nodes/between'
 require 'arel/nodes/not_equal'
 require 'arel/nodes/assignment'
 require 'arel/nodes/or'
 require 'arel/nodes/and'
 require 'arel/nodes/greater_than'
 require 'arel/nodes/greater_than_or_equal'
+require 'arel/nodes/less_than'
 
 require 'arel/nodes/in'
 require 'arel/nodes/lock'
diff --git a/lib/arel/nodes/between.rb b/lib/arel/nodes/between.rb
new file mode 100644
index 0000000000..2e7596cdae
--- /dev/null
+++ b/lib/arel/nodes/between.rb
@@ -0,0 +1,6 @@
+module Arel
+  module Nodes
+    class Between < Arel::Nodes::Binary
+    end
+  end
+end
diff --git a/lib/arel/nodes/less_than.rb b/lib/arel/nodes/less_than.rb
new file mode 100644
index 0000000000..cfaf716c42
--- /dev/null
+++ b/lib/arel/nodes/less_than.rb
@@ -0,0 +1,6 @@
+module Arel
+  module Nodes
+    class LessThan < Arel::Nodes::Binary
+    end
+  end
+end
diff --git a/lib/arel/visitors/to_sql.rb b/lib/arel/visitors/to_sql.rb
index 5a92e27149..d6a9a3697f 100644
--- a/lib/arel/visitors/to_sql.rb
+++ b/lib/arel/visitors/to_sql.rb
@@ -122,6 +122,10 @@ module Arel
         "#{visit o.relation} #{quote_table_name o.name}"
       end
 
+      def visit_Arel_Nodes_Between o
+        "#{visit o.left} BETWEEN #{visit o.right}"
+      end
+
       def visit_Arel_Nodes_GreaterThanOrEqual o
         "#{visit o.left} >= #{visit o.right}"
       end
@@ -130,6 +134,10 @@ module Arel
         "#{visit o.left} > #{visit o.right}"
       end
 
+      def visit_Arel_Nodes_LessThan o
+        "#{visit o.left} < #{visit o.right}"
+      end
+
       def visit_Arel_Nodes_StringJoin o
         "#{visit o.left} #{visit o.right}"
       end
-- 
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