Arel doesn't has to know if a table or column exists.

3 files changed, 21 insertions, 4 deletions

diff --git a/spec/arel/algebra/unit/relations/relation_spec.rb b/spec/arel/algebra/unit/relations/relation_spec.rb
index cf6509fe6a..a1d1793d92 100644
--- a/spec/arel/algebra/unit/relations/relation_spec.rb
+++ b/spec/arel/algebra/unit/relations/relation_spec.rb
@@ -16,10 +16,9 @@ module Arel
       end
 
       describe 'when given a', Symbol, String do
-        it "returns the attribute with the same name, if it exists" do
+        it "returns the attribute with the same name" do
           check @relation[:id].should == @attribute1
           check @relation['id'].should == @attribute1
-          @relation[:does_not_exist].should be_nil
         end
       end
     end
diff --git a/spec/arel/algebra/unit/relations/table_spec.rb b/spec/arel/algebra/unit/relations/table_spec.rb
index 19c1ba2bea..d93446f1b9 100644
--- a/spec/arel/algebra/unit/relations/table_spec.rb
+++ b/spec/arel/algebra/unit/relations/table_spec.rb
@@ -10,7 +10,6 @@ module Arel
       describe 'when given a', Symbol do
         it "manufactures an attribute if the symbol names an attribute within the relation" do
           check @relation[:id].should == Attribute.new(@relation, :id)
-          @relation[:does_not_exist].should be_nil
         end
       end
 
diff --git a/spec/arel/engines/sql/unit/primitives/attribute_spec.rb b/spec/arel/engines/sql/unit/primitives/attribute_spec.rb
index 9f864dd3a1..8daa0d9fd5 100644
--- a/spec/arel/engines/sql/unit/primitives/attribute_spec.rb
+++ b/spec/arel/engines/sql/unit/primitives/attribute_spec.rb
@@ -9,7 +9,7 @@ module Arel
 
     describe '#column' do
       it "returns the corresponding column in the relation" do
-        @attribute.column.should == @relation.column_for(@attribute)
+         @attribute.column.should == @relation.column_for(@attribute)
       end
     end
 
@@ -31,6 +31,25 @@ module Arel
           end
         end
       end
+
+      describe 'for an inexistent attribute' do
+        it "manufactures sql" do
+          sql = @relation[:does_not_exist].to_sql
+
+          adapter_is :mysql do
+            sql.should be_like(%Q{`users`.`does_not_exist`})
+          end
+
+          adapter_is :oracle do
+            sql.should be_like(%Q{"USERS"."DOEST_NOT_EXIST"})
+          end
+
+          adapter_is_not :mysql, :oracle do
+            sql.should be_like(%Q{"users"."does_not_exist"})
+          end
+        end
+      end
+
     end
   end
 end