Add support for #attributes_for_inspect

Implements #214

Author: makmic

lib/active_type/virtual_attributes.rb

@@ -134,13 +134,30 @@ def self.deep_dup(hash)
       result
     end
 
+    def self.attribute_for_inspect(value)
+      if value.is_a?(String) && value.length > 50
+        "#{value[0, 50]}...".inspect
+      elsif value.is_a?(Date) || value.is_a?(Time)
+        %("#{value.to_formatted_s(:db)}")
+      elsif value.is_a?(Array) && value.size > 10
+        inspected = value.first(10).inspect
+        %(#{inspected[0...-1]}, ...])
+      else
+        value.inspect
+      end
+    end
+
     extend ActiveSupport::Concern
 
     included do
       include ActiveType::VirtualAttributes::Serialization
       class_attribute :virtual_columns_hash
       self.virtual_columns_hash = {}
 
+      unless respond_to?(:attributes_for_inspect) # ActiveRecord < 7.2
+        class_attribute :attributes_for_inspect, default: :all
+      end
+
       class << self
         if method_defined?(:attribute)
           alias_method :ar_attribute, :attribute
@@ -270,25 +287,28 @@ def write_virtual_attribute(name, value)
       virtual_attributes[name] = value
     end
 
-    # Returns the contents of the record as a nicely formatted string.
+    def attributes_for_inspect
+      self.class.attributes_for_inspect == :all ? attributes.keys : self.class.attributes_for_inspect
+    end
+
     def inspect
-      inspection = attributes.collect do |name, value|
-        "#{name}: #{VirtualAttributes.attribute_for_inspect(value)}"
-      end.sort.compact.join(", ")
-      "#<#{self.class} #{inspection}>"
+      inspect_with_attributes(attributes_for_inspect)
     end
 
-    def self.attribute_for_inspect(value)
-      if value.is_a?(String) && value.length > 50
-        "#{value[0, 50]}...".inspect
-      elsif value.is_a?(Date) || value.is_a?(Time)
-        %("#{value.to_formatted_s(:db)}")
-      elsif value.is_a?(Array) && value.size > 10
-        inspected = value.first(10).inspect
-        %(#{inspected[0...-1]}, ...])
-      else
-        value.inspect
-      end
+    def full_inspect
+      inspect_with_attributes(attributes.keys)
+    end
+
+    # Returns the contents of the record as a nicely formatted string.
+    def inspect_with_attributes(attribute_names)
+      inspection = attribute_names.collect do |name|
+        name = name.to_s
+        if attributes.key?(name)
+          value = attributes[name]
+          "#{name}: #{VirtualAttributes.attribute_for_inspect(value)}"
+        end
+      end.compact.sort.join(", ")
+      "#<#{self.class} #{inspection}>"
     end
 
     private

spec/active_type/object_spec.rb

@@ -131,6 +131,12 @@ class ObjectWithUnsupportedTypes < Object
     attribute :virtual_hash, :hash
   end
 
+  class ObjectWithClassInspectFilter < ActiveType::Object
+    attribute :visible, :string
+    attribute :hidden, :string
+
+    self.attributes_for_inspect = [:visible]
+  end
 end
 
 
@@ -246,7 +252,6 @@ class ObjectWithUnsupportedTypes < Object
   end
 
   describe '#inspect' do
-
     it 'returns the contents of the object as a nicely formatted string' do
       t = Time.now
       subject.virtual_string = "string"
@@ -258,6 +263,24 @@ class ObjectWithUnsupportedTypes < Object
       expect(subject.inspect).to eq("#<ObjectSpec::Object virtual_attribute: nil, virtual_boolean: true, virtual_date: \"#{Date.today}\", virtual_integer: 17, virtual_string: \"string\", virtual_time: \"#{t.to_formatted_s(:db)}\", virtual_type_attribute: nil>")
     end
 
+    it 'does not filter out any attributes per default' do
+      object = ObjectSpec::ObjectWithClassInspectFilter.new(visible: 'seen', hidden: 'also-seen')
+      expect(object.full_inspect).to eq('#<ObjectSpec::ObjectWithClassInspectFilter hidden: "also-seen", visible: "seen">')
+    end
+
+    context 'with attributes_for_inspect class attribute' do
+      it 'filters attributes based on the class configuration' do
+        object = ObjectSpec::ObjectWithClassInspectFilter.new(visible: 'seen', hidden: 'invisible')
+        expect(object.inspect).to eq('#<ObjectSpec::ObjectWithClassInspectFilter visible: "seen">')
+      end
+    end
+  end
+
+  describe '#full_inspect' do
+    it 'shows all attributes' do
+      object = ObjectSpec::ObjectWithClassInspectFilter.new(visible: 'seen', hidden: 'not-so-invisible-anymore')
+      expect(object.full_inspect).to eq('#<ObjectSpec::ObjectWithClassInspectFilter hidden: "not-so-invisible-anymore", visible: "seen">')
+    end
   end
 
   describe '#attributes' do