Use `unboundable?` rather than `boundable?`

The `unboundable?` behaves like the `infinite?`.

```ruby
inf = Topic.predicate_builder.build_bind_attribute(:id, Float::INFINITY)
inf.infinite?    # => 1

oob = Topic.predicate_builder.build_bind_attribute(:id, 9999999999999999999999999999999)
oob.unboundable? # => 1

inf = Topic.predicate_builder.build_bind_attribute(:id, -Float::INFINITY)
inf.infinite?    # => -1

oob = Topic.predicate_builder.build_bind_attribute(:id, -9999999999999999999999999999999)
oob.unboundable? # => -1
```

1 files changed, 12 insertions, 7 deletions

diff --git a/activerecord/lib/active_record/relation/query_attribute.rb b/activerecord/lib/active_record/relation/query_attribute.rb
index b45326bdda..5e0b4ac160 100644
--- a/activerecord/lib/active_record/relation/query_attribute.rb
+++ b/activerecord/lib/active_record/relation/query_attribute.rb
@@ -20,18 +20,23 @@ module ActiveRecord
       def nil?
         !value_before_type_cast.is_a?(StatementCache::Substitute) &&
           (value_before_type_cast.nil? || value_for_database.nil?)
+      rescue ::RangeError
       end
 
-      def boundable?
-        return @_boundable if defined?(@_boundable)
-        nil?
-        @_boundable = true
+      def infinite?
+        infinity?(value_before_type_cast) || infinity?(value_for_database)
       rescue ::RangeError
-        @_boundable = false
       end
 
-      def infinite?
-        infinity?(value_before_type_cast) || boundable? && infinity?(value_for_database)
+      def unboundable?
+        if defined?(@_unboundable)
+          @_unboundable
+        else
+          value_for_database
+          @_unboundable = nil
+        end
+      rescue ::RangeError
+        @_unboundable = type.cast(value_before_type_cast) <=> 0
       end
 
       private