谷歌的App Engine（Python的SDK） - 如何捕捉分貝例外

我使用谷歌應用程序引擎Python和遇到類似這樣的錯誤：谷歌的App Engine（Python的SDK） - 如何捕捉分貝例外

raise BadValueError('Property %s is not multi-line' % self.name) 
BadValueError: Property title is not multi-line 
ERROR 2014-09-20 16:01:23,969 wsgi.py:278] 
Traceback (most recent call last):

我已經導入了數據庫模塊：from google.appengine.ext import db

而且我試圖默默（現在）與捉代碼中的錯誤是這樣的：

try: 
    r.put() 
except db.Error: 
    pass

但錯誤繼續中斷程序執行。我究竟做錯了什麼？（？或不做）

謝謝...

以下是完整的回溯：

Traceback (most recent call last): 
    File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1511, in __call__ 
    rv = self.handle_exception(request, response, e) 
    File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1505, in __call__ 
    rv = self.router.dispatch(request, response) 
    File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1253, in default_dispatcher 
    return route.handler_adapter(request, response) 
    File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 1077, in __call__ 
    return handler.dispatch() 
    File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 547, in dispatch 
    return self.handle_exception(e, self.app.debug) 
    File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.3/webapp2.py", line 545, in dispatch 
    return method(*args, **kwargs) 
    File "/Users/me/myapp/myapp.py", line 191, in get 
    date_last_modified = date_last_modified) 
    File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/ext/db/__init__.py", line 970, in __init__ 
    prop.__set__(self, value) 
    File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/ext/db/__init__.py", line 614, in __set__ 
    value = self.validate(value) 
    File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/ext/db/__init__.py", line 2847, in validate 
    raise BadValueError('Property %s is not multi-line' % self.name) 
BadValueError: Property column_series is not multi-line

來源

2014-09-20 dmc7z

對於初學者來說，你會發現錯誤的例外。例外是'BadValueError'。 – 2014-09-20 16:20:14

@BurhanKhalid：'db.BadValueError'是'db.Error'的子類。 – 2014-09-20 16:28:24

你有正確的例外;但你是否在正確的位置*捕捉到它？請向我們展示完整的追溯。 – 2014-09-20 16:28:52

將引發異常同時設置屬性;你可以看到該行的最後一部分，你應該捕獲該異常在代碼中回溯：

File "/Users/me/myapp/myapp.py", line 191, in get 
    date_last_modified = date_last_modified)

你正在創建或更新實例有，而這也正是異常應該被捕獲，而不是打電話時r.put()。

來源

2014-09-20 17:33:29

啊，有道理。謝謝！！ – dmc7z 2014-09-20 17:36:23

谷歌的App Engine（Python的SDK） - 如何捕捉分貝例外

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