Improve BigDecimal mongoize behavior

lib/mongoid/extensions/big_decimal.rb

@@ -28,6 +28,18 @@ def mongoize
         to_s
       end
 
+      # Is the BigDecimal a number?
+      #
+      # @example Is the object a number?.
+      #   object.numeric?
+      #
+      # @return [ true ] Always true.
+      #
+      # @since 6.0.0
+      def numeric?
+        true
+      end
+
       module ClassMethods
 
         # Convert the object from its mongo friendly ruby type to this type.
@@ -37,28 +49,25 @@ module ClassMethods
         #
         # @param [ Object ] object The object to demongoize.
         #
-        # @return [ Object ] The object.
+        # @return [ BigDecimal, nil ] A BigDecimal derived from the object or nil.
         #
         # @since 3.0.0
         def demongoize(object)
-          if object
-            object.numeric? ? ::BigDecimal.new(object.to_s) : object
-          end
+          object && object.numeric? ? ::BigDecimal.new(object.to_s) : nil
         end
 
-        # Mongoize an object of any type to how it's stored in the db as a big
-        # decimal.
+        # Mongoize an object of any type to how it's stored in the db as a String.
         #
         # @example Mongoize the object.
         #   BigDecimal.mongoize(123)
         #
         # @param [ Object ] object The object to Mongoize
         #
-        # @return [ String ] The mongoized object.
+        # @return [ String, nil ] A String representing the object or nil.
         #
         # @since 3.0.7
         def mongoize(object)
-          object ? object.to_s : object
+          object && object.numeric? ? object.to_s : nil
         end
       end
     end

lib/mongoid/extensions/string.rb

@@ -72,7 +72,8 @@ def mongoid_id?
         self =~ /\A(|_)id$/
       end
 
-      # Is the string a number?
+      # Is the string a number? The literals "NaN", "Infinity", and "-Infinity"
+      # are counted as numbers.
       #
       # @example Is the string a number.
       #   "1234.23".numeric?
@@ -81,7 +82,7 @@ def mongoid_id?
       #
       # @since 3.0.0
       def numeric?
-        true if Float(self) rescue (self == "NaN")
+        true if Float(self) rescue (self =~ /^NaN|\-?Infinity$/)
       end
 
       # Get the string as a getter string.

lib/mongoid/findable.rb

@@ -11,7 +11,7 @@ module Findable
     select_with :with_default_scope
 
     # These are methods defined on the criteria that should also be accessible
-    # directly from the the class level.
+    # directly from the class level.
     delegate \
       :aggregates,
       :avg,

spec/mongoid/attributes/nested_spec.rb

@@ -1970,7 +1970,7 @@ class BandWithAllowDestroyedRecords < Band
                       }
                   end
 
-                  it "ignores the the marked document" do
+                  it "ignores the marked document" do
                     expect(person.addresses.size).to eq(1)
                   end
 
@@ -2031,7 +2031,7 @@ class BandWithAllowDestroyedRecords < Band
                       }
                   end
 
-                  it "adds the the marked document" do
+                  it "adds the marked document" do
                     expect(person.addresses.first.street).to eq("Maybachufer")
                   end
 
@@ -2091,7 +2091,7 @@ class BandWithAllowDestroyedRecords < Band
                       }
                   end
 
-                  it "adds the the marked document" do
+                  it "adds the marked document" do
                     expect(person.addresses.first.street).to eq("Maybachufer")
                   end
 
@@ -3431,7 +3431,7 @@ class BandWithAllowDestroyedRecords < Band
                       }
                   end
 
-                  it "ignores the the marked document" do
+                  it "ignores the marked document" do
                     expect(person.posts.size).to eq(1)
                   end
 
@@ -3492,7 +3492,7 @@ class BandWithAllowDestroyedRecords < Band
                       }
                   end
 
-                  it "adds the the marked document" do
+                  it "adds the marked document" do
                     expect(person.posts.first.title).to eq("New Blog")
                   end
 
@@ -3552,7 +3552,7 @@ class BandWithAllowDestroyedRecords < Band
                       }
                   end
 
-                  it "adds the the marked document" do
+                  it "adds the marked document" do
                     expect(person.posts.first.title).to eq("New Blog")
                   end
 
@@ -4097,7 +4097,7 @@ class BandWithAllowDestroyedRecords < Band
                       }
                   end
 
-                  it "ignores the the marked document" do
+                  it "ignores the marked document" do
                     expect(person.preferences.size).to eq(1)
                   end
 
@@ -4158,7 +4158,7 @@ class BandWithAllowDestroyedRecords < Band
                       }
                   end
 
-                  it "adds the the marked document" do
+                  it "adds the marked document" do
                     expect(person.preferences.first.name).to eq("New Blog")
                   end
 
@@ -4218,7 +4218,7 @@ class BandWithAllowDestroyedRecords < Band
                       }
                   end
 
-                  it "adds the the marked document" do
+                  it "adds the marked document" do
                     expect(person.preferences.first.name).to eq("New Blog")
                   end