在模型中,我有一个字幕字段,如果给定对象的字段不存在值,则填充None
。
是否可以将值显示为自定义内容(例如Not Available
或Not Applicable
,而不仅仅显示(None)
字段
sub_title = models.CharField(max_length=255, null=True, blank=True)
管理员
list_display = 'sub_title',
PS:我想在数据库中使用None
,而在管理面板上只需要一个自定义值。
感谢
答案 0 :(得分:9)
SCOM_ConnectionSettings();
Guid alertId = Guid.Empty;
//StreamReader streamReader = new StreamReader(alertIDsToClose);
//streamReader.
Dictionary<string, string> alertIDs = JsonConvert.DeserializeObject<Dictionary<string, string>>(alertIDsToClose);
#region test
//String str = WebOperationContext.Current.IncomingRequest.Accept.ToString();
//StreamReader reader = new StreamReader(alertIDs);
//String res = reader.ReadToEnd();
//NameValueCollection coll = HttpUtility.ParseQueryString(res);
//foreach(string alertID in alertIDs)
//{
#endregion
foreach (KeyValuePair<string, string> alertID in alertIDs)
{
alertId = new Guid(alertID.Value);
}
MonitoringAlert monitoringAlert = mgGroup.GetMonitoringAlert(alertId);
ReadOnlyCollection<MonitoringAlertResolutionState> alertStates = mgGroup.GetMonitoringAlertResolutionStates();
MonitoringAlertResolutionState closedState = null;
foreach (MonitoringAlertResolutionState thisState in alertStates)
{
if (thisState.Name == "Closed")
{
closedState = thisState;
}
}
if (monitoringAlert.ResolutionState != closedState.ResolutionState)
{
monitoringAlert.ResolutionState = closedState.ResolutionState;
string comment = "closing availability alert";
monitoringAlert.Update(comment);
}
}
可以接受可调用,因此您可以执行此操作:
list_display
docs提供了其他几个用于提供可调用的选项。
答案 1 :(得分:8)
如果您使用 empty_value_display
empty_value_display
此属性会覆盖记录的空字段(无,空字符串等)的默认显示值。默认值为 - (破折号)。
class AuthorAdmin(admin.ModelAdmin):
list_display = ('sub_title',)
sub_title.empty_value_display = 'Not Available'
这适用于django >= 1.9