Elasticsearch：处理 AttributeError: 'Response' object has no attribute 'my_suggest' 异常处理

1. 环境

• windows 10；
• elasticsearch 7.8.0；
• Django

2. 问题

• 使用 elasticsearch + Django 搭建搜索引擎，在获取 suggest 时遇到 AttributeError: 'Response' object has no attribute 'my_suggest' 报错，
• 问题代码如下：

from SEARCH.models import ArticleType  # 注意：ArticleType 是在另一个文件单独定义的！
from django.http import HttpResponse
from elasticsearch import Elasticsearch
from datetime import datetime

client = Elasticsearch(hosts=["127.0.0.1"])

s = ArticleType.search()
s = s.suggest(
    'my_suggest',
    "xx",
    completion={
        "field": "suggest",
        "fuzzy": {
            "fuzziness": 2
        },
        "size": 10
    }
)
suggestions = s.execute()

• 报错如下：

KeyError: 'my_suggest'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python37\lib\site-packages\django\core\handlers\exception.py", line 34, in inner
response = get_response(request)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python37\lib\site-packages\django\core\handlers\base.py", line 115, in _get_response
response = self.process_exception_by_middleware(e, request)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python37\lib\site-packages\django\core\handlers\base.py", line 113, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python37\lib\site-packages\django\views\generic\base.py", line 71, in view
return self.dispatch(request, *args, **kwargs)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python37\lib\site-packages\django\views\generic\base.py", line 97, in dispatch
return handler(request, *args, **kwargs)
File "C:\Users\Administrator\Desktop\E_engine\E_search\SEARCH\views.py", line 36, in get
for match in suggestions.my_suggest[0].options:
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python37\lib\site-packages\elasticsearch_dsl\utils.py", line 130, in getattr
'{!r} object has no attribute {!r}'.format(self.class.name, attr_name))
AttributeError: 'Response' object has no attribute 'my_suggest'

3. 解决

• 原因
  elasticsearch 版本更新导致用法变更，问题代码是旧的写法，需要将 s.execute_suggest() 变更为 s.execute().to_dict()；
• 更新代码

from django.http import HttpResponse
from elasticsearch import Elasticsearch
from datetime import datetime

client = Elasticsearch(hosts=["127.0.0.1"])

s = ArticleType.search()
s = s.suggest(
    'my_suggest',
    "九州",
    completion={
        "field": "suggest",
        "fuzzy": {
            "fuzziness": 2
        },
        "size": 10
    }
)
# 调用 execute_suggest 方法
# suggestions = s.execute()
suggestions = s.execute().to_dict()    # 此处将 s.execute_suggest()  变更为  s.execute().to_dict()
print("#" * 50)
print(suggestions)
print("#" * 50)

• 打印结果如下，问题解决：

image.png