使用django在数据库中保存异常消息

Question

我想使用django将异常存储在数据库中。我怎么能做到这一点。是否有任何libaray来完成将异常存储在数据库中的任务。

Answer 1

将您的异常定义为Django模型。

Answer 2

最近我完成了一个你想要的项目。

我们有一个非Django Python引擎的网站。我创建了一个简单的Django项目，

1. 通过http请求接收有关新异常的信息。在基本项目中有一个全球性的尝试捕获。如果发生异常，则http请求将发送异常的详细信息。因此，我们需要一个特殊的视图来接收有关新异常的信息

2. 显示有关异常组和异常的信息异常组是一组类似的异常。如果异常具有非常相似的回溯，则它们属于同一组。我使用下一个功能来检查组中是否存在异常：

   def are_slightly_diff( s1, s2 ):
       """ Returns True if s1 is similar to s2. 
           s1 and s2 are several strings in one (slashn-separated). """
       similar_count = 0
       s2_list = list( s2 )
       for ch in s1:
           try:            
               i_s2 = s2_list.index( ch )
           except ValueError:
               pass
           else:
           del s2_list[ i_s2 ]
       len_s2_list = len( s2_list )
       max_diff = int( len( s1 ) * 0.1 )
       if max_diff < 1:
           max_diff = 1
       return len_s2_list <= max_diff
   

所以我有两个模型-一个用于异常组：

class ExceptionItemGroup( models.Model ):
    _NEW_GROUP_NAME = 'Exceptions {0}'
    name = models.CharField( max_length = 512 )
    last_line = models.TextField() # matching template
    prev_lines = models.TextField()
    created_dt = models.DateTimeField( auto_now_add = True )
    last_modified_dt = models.DateTimeField( auto_now = True )
    def rename( self, name ):
        self.name = name
    @staticmethod
    def find( cur_lines, site_id ):
        """ Find an exception group corresponding to the exception item. 
            Exc_item must contain formalized exception. """
        # 1) Check prev_lines
        cur_prev_lines = cur_lines[ : -1 ]
        cur_last_line = cur_lines[ -1 ]
        similar_groups = ExceptionItemGroup.objects.filter( site_id = site_id, prev_lines = list2line( cur_prev_lines ) )
        for sim_g in similar_groups:        
            if are_slightly_diff( cur_last_line, sim_g.last_line ):
                return sim_g # group was found        
        return None # group was not found
    @staticmethod
    def create_from_data( site_id, exc_lines, name ):
        " Use this method if a group was not found. "        
        with transaction.commit_on_success():
            g = ExceptionItemGroup( site_id = site_id, name = name )
            g.prev_lines = list2line( exc_lines[ : -1 ] )
            g.last_line = exc_lines[ -1 ]    
            g.save()
        return g
    def __unicode__( self ):
        return self.name
    class Meta:
        db_table = 'exc_item_group'

另一个用于组中的异常（因此，模型有一个外键）：

class ExceptionItem( models.Model ):
    group = models.ForeignKey( ExceptionItemGroup )
    title = models.TextField()
    body = models.TextField()
    created_dt = models.DateTimeField( auto_now_add = True )
    @staticmethod
    def create( group, title, html ):
        item = ExceptionItem( group = group, title = title, body = html )
        item.save()
    def __unicode__( self ):
        return self.title
    class Meta:
        db_table = 'exc_item'

有一些视图可在异常之间导航：

1. 带有异常组列表的视图
2. 组中包含异常列表的视图
3. 从基本项目接收到的具有完整异常信息的视图