old_contents: from rest_framework import serializers
  
  from .models import Part
  
  
  class PartSerializer(serializers.ModelSerializer):
      """ Serializer for complete detail information of a part.
      Used when displaying all details of a single component.
      """
  
      class Meta:
          model = Part
          fields = [
              'url',  # Link to the part detail page
              'name',
              'IPN',
              'URL',  # Link to an external URL (optional)
              'description',
              'category',
              'category_path',
              'total_stock',
              'available_stock',
              'units',
              'trackable',
              'buildable',
              'trackable',
              'salable',
          ]
  
new_contents: from rest_framework import serializers
  
  from .models import Part
  
  
  class PartSerializer(serializers.ModelSerializer):
      """ Serializer for complete detail information of a part.
      Used when displaying all details of a single component.
      """
  
      def _category_name(self, part):
          if part.category:
              return part.category.name
          return ''
  
      def _category_url(self, part):
          if part.category:
              return part.category.get_absolute_url()
          return ''
  
      category_name = serializers.SerializerMethodField('_category_name')
      category_url = serializers.SerializerMethodField('_category_url')
  
      class Meta:
          model = Part
          fields = [
              'pk',
              'url',  # Link to the part detail page
              'name',
              'IPN',
              'URL',  # Link to an external URL (optional)
              'description',
              'category',
              'category_name',
              'category_url',
              'total_stock',
              'available_stock',
              'units',
              'trackable',
              'buildable',
              'trackable',
              'salable',
          ]
  
subject: Add category info to part serializer