Is there a way to force Django models to pass a field to a MySQL function every time the model data is read or loaded? To clarify what I mean in SQL, I want the Django model to produce something like ...
赋予你对案文的拘束力,而不是根基。 (在标准<代码>和t;Control-Key-b> 具有约束力且经过处理 > 之后处理) 鸡奸是你想要在这里使用的。 你们需要做的是<条码>休息条码>;它抑制了随后的约束力。 (如果你在此之后再次出现任何问题,则可能认为重点是错误的,但很容易确定。)
唯一的替代办法是重新配置约束性标签,以便在最高一级具有约束力后处理具有约束力的等级,但这样做的后果非常微妙和深远;你应从我的第一段中采用更为简单的做法,而这样做是处理这些事情的正常方式。
包装按具体顺序处理,由该植被的<编码>bindtags界定。 否则,命令是:
- The specific widget
- The widget class
- The toplevel window
- The special class "all"
如果存在相互矛盾的约束力——例如,对植被和类别都具有约束力的控制-b,除非你通过返回<条码>而打破这一链条,否则这两者都将(按所述顺序)。
In the case of the code you posted, however, you are binding to the toplevel window (ie: the root window), and the conflicting binding is on the class. Therefore, the binding will fire for the class before it is processed by the toplevel, so even if your binding returned "break"
it wouldn t matter since the class binding happens first.
最为直截了当的解决办法是将你的约束力移至实际植被和返回<代码>“突破”代码>。 这将首先保证你的约束性火力,而return “break”
则保证具有约束力的火级不发生火灾。
如果你真的希望你对根窗口具有约束力,则你可采用<编码>bind_}/code>方法,取消对该等舱的约束力,其数值为>>Text”
。
http://www.pythonware.com/library/tkinter/introduction/events-and- bindings.htm Activities and Bleds page on effbot.org to be used.
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