Django错误只在MySQL数据库上

本地我使用sqllite3作为数据库，但在生产中我使用MySQL。当我提出我的项目到生产我遇到了这个错误：Django错误只在MySQL数据库上

... 
File "S:\Python27\lib\site-packages\django\templatetags\i18n.py", line 46, in 
render 
    langs = self.languages.resolve(context) 
    File "S:\Python27\lib\site-packages\django\template\base.py", line 653, in res 
olve 
    value = self._resolve_lookup(context) 
    File "S:\Python27\lib\site-packages\django\template\base.py", line 692, in _re 
solve_lookup 
    raise VariableDoesNotExist("Failed lookup for key [%s] in %r", (bit, current 
)) # missing attribute 
VariableDoesNotExist: Failed lookup for key [LANGUAGES] in u'[{}, {}, {}]'

我使用Django的国际化

在哪里这是哪里来的任何想法？谷歌没有多少信息，也没有什么数据可以用来调试？我将本地测试环境指向生产数据库，并得到相同的错误。在settings.py

我的语言变种是：

LANGUAGES = (
    ('en',gettext('English')), 
    ('fr',gettext('French')), 
)

编辑使用调试打开我的错误：

Caught OperationalError while rendering: (1242, 'Subquery returns more than 1 row')

上线{% for f in frames %}

我的框架型号是：

@I18n('title','description') 
class Collection(models.Model): 
    title = models.CharField(max_length=255) 
    description = models.CharField(max_length=255) 
    order = models.IntegerField(default=100) 
    image = models.ImageField(upload_to="collection/images",null=True) 
    rollover = models.ImageField(upload_to="collection/images",null=True,blank=True) 
    publish = models.BooleanField(default=True) 

    def __unicode__(self): 
     return self.title 

@I18n('title') 
class Frame(models.Model): 
    title = models.CharField(max_length=255) 
    collection = models.ManyToManyField(Collection) 
    order = models.IntegerField(default=100) 
    image = models.ImageField(upload_to="frame/images") 
    rollover = models.ImageField(upload_to="frame/images",null=True,blank=True) 
    publish = models.BooleanField(default=True) 

    def __unicode__(self): 
     return self.title

编辑＃2

麻烦的MySQL线，不SQLite中

SELECT `FrontEnd_article`.`id`, `FrontEnd_article`.`title_fr`, `FrontEnd_article` 
.`title_en`, `FrontEnd_article`.`text_fr`, `FrontEnd_article`.`text_en`, 
`FrontEnd_article`.`date`, `FrontEnd_article`.`image`, `FrontEnd_article`.`image_text`, 
`FrontEnd_article`.`can_comment`, `FrontEnd_article`.`order`, 
`FrontEnd_article`.`publish` FROM `FrontEnd_article` INNER JOIN 
`FrontEnd_article_frames` ON (`FrontEnd_article`.`id` = 
`FrontEnd_article_frames`.`article_id`) WHERE `FrontEnd_article_frames`.`frame_id` = 
(SELECT U0.`id` FROM `FrontEnd_frame` U0 INNER JOIN `FrontEnd_frame_collection` U1 ON 
(U0.`id` = U1.`frame_id`) WHERE (U1.`collection_id` = 1 AND U0.`publish` = True)) 
ORDER BY `FrontEnd_article`.`date` DESC

的帮助失败再次

谢谢！

来源

2011-05-30 Valchris

如果您暂时启用DEBUG，回溯是否相同？错误消息被禁用时可能会产生误导。这也可能是一个错误的数据库设置，Django在不同的阶段退出。

来源

2011-05-30 20:26:23

哇谢谢你的提示！我想我是部分追逐红鲱鱼。我现在得到这个错误... Caught OperationalError呈现时:(1242，'子查询返回多于一行'） – Valchris 2011-05-30 20:50:04

如何导致错误的数据库查询看起来像？它使用orm还是原始的sql？显然，查询包含sql在sqlite中有效，但不在mysql中，因此引发了OperationalError。 – 2011-05-30 21:24:13

SELECT * FROM FrontEnd_article INNER JOIN FrontEnd_article_frames ON 
(FrontEnd_article.id = FrontEnd_article_frames.article_id) WHERE 
FrontEnd_article_frames.frame_id = (SELECT U0.id FROM FrontEnd_frame U0 INNER JOIN 
FrontEnd_frame_collection U1 ON (U0.id = U1.frame_id) WHERE (U1.collection_id = 1 AND 
U0.publish = True))

这是由Django生成的简化版本。当我打破了这个查询我意识到，内部联接假设只有1值从返回：

(SELECT U0.id FROM FrontEnd_frame U0 INNER JOIN FrontEnd_frame_collection U1 ON 
(U0.id = U1.frame_id) WHERE (U1.collection_id = 1 AND U0.publish = True))

这实际上返回的结果集的数据。修复很简单，一旦我找到它，我用“IN”替换了“=”，它工作正常。

FrontEnd_article_frames.frame_id IN (SELECT U0.id FROM FrontEnd_frame U0 INNER JOIN 
FrontEnd_frame_collection U1 ON (U0.id = U1.frame_id) WHERE (U1.collection_id = 1 AND 
U0.publish = True))

来源

2011-05-31 13:55:59 Valchris

Django错误只在MySQL数据库上

回答

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