diff --git a/.rubocop.yml b/.rubocop.yml
index 997388e..3b94cf3 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -3,8 +3,10 @@ AllCops:
   NewCops: enable
 
 Style/StringLiterals:
-  Enabled: true
-  EnforcedStyle: double_quotes
+  Enabled: false
+
+Style/QuotedSymbols:
+  Enabled: false
 
 Style/StringLiteralsInInterpolation:
   Enabled: true
diff --git a/lib/mem_db/field/may_missing.rb b/lib/mem_db/field/may_missing.rb
index 5fff51f..5d6c456 100644
--- a/lib/mem_db/field/may_missing.rb
+++ b/lib/mem_db/field/may_missing.rb
@@ -37,6 +37,18 @@ def new_matching(value)
           @original.new_matching(value)
         end
       end
+
+      def field_value(obj)
+        if obj[field].nil?
+          nil
+        else
+          @original.field_value(obj)
+        end
+      end
+
+      def prepare_query(obj)
+        @original.prepare_query(obj)
+      end
     end
   end
 end
diff --git a/lib/mem_db/version.rb b/lib/mem_db/version.rb
index 4b4aea4..3b71177 100644
--- a/lib/mem_db/version.rb
+++ b/lib/mem_db/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 class MemDB
-  VERSION = "0.1.0"
+  VERSION = "0.1.2"
 end
diff --git a/spec/field/may_missing_spec.rb b/spec/field/may_missing_spec.rb
index 219923d..4bc692f 100644
--- a/spec/field/may_missing_spec.rb
+++ b/spec/field/may_missing_spec.rb
@@ -52,4 +52,32 @@
     query: {category: "games"},
     expect: false
   }
+
+  context 'when decorate other field' do
+    let(:field) { described_class.new(MemDB::Field::Enum.new(:category).downcase) }
+
+    it_behaves_like "field", "field is missing", {
+      matching: {},
+      query: {category: "food"},
+      expect: true
+    }
+
+    it_behaves_like "field", "field is nil", {
+      matching: {category: nil},
+      query: {category: "food"},
+      expect: true
+    }
+
+    it_behaves_like "field", "exact single match", {
+      matching: {category: "food"},
+      query: {category: "food"},
+      expect: true
+    }
+
+    it_behaves_like "field", "exact single match by decorated value", {
+      matching: {category: "foOD"},
+      query: {category: "FOod"},
+      expect: true
+    }
+  end
 end