我正在尝试使用 python Django 从数据库中获取数据，但出现错误答案

【问题标题】：I am trying to get data from database using python Django but got an error我正在尝试使用 python Django 从数据库中获取数据，但出现错误
【发布时间】：2022-01-18 05:28:40
【问题描述】：

大家好，我正在尝试从数据库中获取数据，但是当我尝试从 db 中获取单个数据时会出错，如下所示

wahid = Webapp.objects.get(title="Ecommerce Website")
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\query.py", line 418, in get
    clone = self._chain() if self.query.combinator else self.filter(*args, **kwargs)
  File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\query.py", line 942, in filter
    return self._filter_or_exclude(False, *args, **kwargs)
  File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\query.py", line 962, in _filter_or_exclude
    clone._filter_or_exclude_inplace(negate, *args, **kwargs)
  File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\query.py", line 969, in _filter_or_exclude_inplace
    self._query.add_q(Q(*args, **kwargs))
  File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\sql\query.py", line 1358, in add_q
    clause, _ = self._add_q(q_object, self.used_aliases)
  File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\sql\query.py", line 1377, in _add_q
    child_clause, needed_inner = self.build_filter(
  File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\sql\query.py", line 1258, in build_filter
    lookups, parts, reffed_expression = self.solve_lookup_type(arg)
  File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\sql\query.py", line 1084, in solve_lookup_type
    _, field, _, lookup_parts = self.names_to_path(lookup_splitted, self.get_meta())
  File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\sql\query.py", line 1481, in names_to_path
    raise FieldError("Cannot resolve keyword '%s' into field. "
django.core.exceptions.FieldError: Cannot resolve keyword 'title' into field. Choices are: created, demo_link, description, id, review, source_link, tags, tiltle, vote_ratio, vote_total

It will work only on getting all data from db as shown in image

【问题讨论】：

模型字段被命名为“tiltle”而不是“title”？
你的 Webapp 模型是否包含 title 属性
非常感谢，这是一个拼写错误，现在已经解决了

标签： django django-models django-forms django-database django-errors

【解决方案1】：

有一个拼写错误，您已经在模型中创建了字段名称“title”，但是您试图在 get 查询中获取“title”

此外，如果有多个记录具有 title="Ecommerce Website"

，则使用 get 查询可能会引发错误

你可以使用

 Webapp.objects.filter(title="Ecommerce Website")

【讨论】：

是的，是拼写错误，非常感谢

【解决方案2】：

你应该在你的模型中重命名标题字段，你似乎输入了错误的标题字段名称

'tiltle' 必须是模型中的'title'

【讨论】：

是的，我正确地重命名了标题字段，它的工作谢谢