from rest_framework import serializers
from .models import Changelog


class ChangelogSerializer(serializers.ModelSerializer):
    """更新日志序列化器"""

    update_type_display = serializers.CharField(
        source='get_update_type_display',
        read_only=True
    )

    class Meta:
        model = Changelog
        fields = [
            'id', 'version', 'title', 'description',
            'update_type', 'update_type_display',
            'published_at', 'is_published',
            'created_at', 'updated_at',
        ]
        read_only_fields = ['created_at', 'updated_at']