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Description: include Enumerable
Homepage: http://defunkt.github.com/ambition
Clone URL: git://github.com/defunkt/ambition.git 
add #nil? to the activerecord adapter
defunkt (author)
Sat Feb 16 03:29:03 -0800 2008
commit  f95a94fce0cde528ea7adb26d9906d4976a21aad
tree    a9de9527524ee2232768ee372a9dbb5474641d75
parent  a8d2cdf409d42c3cf55889a1751b6d8d1c608568
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adapters/ambitious_activerecord/lib/ambition/adapters/active_record/select.rb 
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@@ -81,6 +81,11 @@ module Ambition
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           "#{right} IN (#{left})"
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         end
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+        def nil?(column)
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+          left = "#{owner.table_name}.#{quote_column_name column}"
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+          @negated ? not_equal(left, nil) : self.==(left, nil)
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+        end
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+
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         def downcase(column)
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           "LOWER(#{owner.table_name}.#{quote_column_name column})"
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         end
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adapters/ambitious_activerecord/test/types_test.rb 
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@@ -52,6 +52,16 @@ context "Different types" do
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     sql.should == "SELECT * FROM users WHERE users.name IS NOT NULL"
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   end
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+  specify "nil?" do
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+    sql = User.select { |m| m.name.nil? }.to_s
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+    sql.should == "SELECT * FROM users WHERE users.name IS NULL"
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+  end
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+
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+  specify "!nil?" do
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+    sql = User.select { |m| !m.name.nil? }.to_s
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+    sql.should == "SELECT * FROM users WHERE users.name IS NOT NULL"
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+  end
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+
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   specify "Time" do
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     sql = User.select { |m| m.name == Time.now }.to_s
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     sql.should == "SELECT * FROM users WHERE users.name = '#{Time.now.to_s(:db)}'"

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