Rails migrations let you use model logic with your data migration where SQL scripts don't.
Rails迁移支持把模型逻辑用于数据迁移，而sql脚本做不到这一点。
Such a design makes maintenance all but impossible, because whenever the view changes, you must change the model logic, and vice versa.
这样的设计使得维护几乎不可能实现，因为无论视图何时改变，您都必须改变模型逻辑，反之亦然。
The monitor model debugger was added in monitor V6.1.2 as way to understand the operation of a monitor model and to identify and resolve model logic problems.
在MonitorV6.1.2中添加了Monitor模型调试工具，以了解监视器模型的操作，并确定和解决模型逻辑问题。
I prefer to use a controller, because I can use it to fire the model logic, then do some validation processing, and then route the user to an error-handling or result page as appropriate.
我更喜欢使用控制器，因为我可以使用它来触发模型逻辑，然后进行某种验证处理，接着将用户路由到一个相应的错误处理或结果页。
The whole paper uses a various research methods like analysis model, logic diagram and case studies, in order to be reasonable and well organized.
在展开此选题的研究论述中，本文使用了建立分析模型、总结逻辑图表、进行案例分析等方式和手段，力求做到有理有据、条理清晰。
The warehouse model of data was discussed from three aspects which were conceptual model, logic model and physical model.
其中数据仓库模型从概念模型、逻辑模型和物理模型三个方面进行讨论。
The warehouse model of data was discussed from three aspects which were conceptual model, logic model and physical model.
其中数据仓库模型从概念模型、逻辑模型和物理模型三个方面进行讨论。
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