feat: printing module

stateflow/serializers.py

@@ -9,11 +9,21 @@ from stateflow import models
 
 class StateParameterSerializer(serializers.ModelSerializer):
     """状态参数序列化器"""
+    attachment_url = serializers.SerializerMethodField(read_only=True)
     
     class Meta:
         model = models.StateParameter
-        fields = ['id', 'key', 'value', 'description']
-        read_only_fields = ['id']
+        fields = ['id', 'key', 'value', 'attachment', 'attachment_url', 'description']
+        read_only_fields = ['id', 'attachment_url']
+    
+    def get_attachment_url(self, obj):
+        """获取附件的完整 URL"""
+        if obj.attachment:
+            request = self.context.get('request')
+            if request:
+                return request.build_absolute_uri(obj.attachment.url)
+            return obj.attachment.url
+        return None
 
 
 class StateListSerializer(serializers.ModelSerializer):