CN) 构建 现在我们将用额外的元数据来定义你的模型 —— 本质上是你的数据库布局。 设计哲学 模型是你数据的简单明确的描述。它包含了储存的数据所必要的字段和行为。Django 遵循 DRY 原则。它的目标是让你只需要在一 个地方定义数据模型，Django 就能自动从中导出迁移代码。 来介绍一下迁移 - 举个例子，不像 Ruby On Rails，Django 的迁移代码全部都是从你的模型文件导出的，它本质上只是个历史 坏他们的）。如果你想作为一个 Django 程序 员谋生的话，你必须擅长编写测试！ 测试有几种不同的应用方法。 一些开发者遵循 测试驱动开发（test-driven development）的原则，他们在写代码之前先写测 试。这种方法看起来有点反直觉，但事实上，这和大多数人日常的做法是相吻合的。我们会先描述一 个问题，然后写代码来解决它。「测试驱动」的开发方法只是将问题的描述抽象为了 Python

In older versions, new callbacks added while executing transaction.on_commit() callbacks were not cap- tured. LiveServerTestCase class LiveServerTestCase LiveServerTestCase does basically the same as buffer_with_style(width, quadsegs=8, end_cap_style=1, join_style=1, mitre_limit=5.0) Same as buffer(), but allows customizing the style of the buffer. • end_cap_style can be round (1), flat (2), or square

assigns the HttpRequest to the view’s request attribute, and any positional and/or keyword arguments cap- tured from the URL pattern to the args and kwargs attributes, respectively. Then dispatch() is called buffer_with_style(width, quadsegs=8, end_cap_style=1, join_style=1, mitre_limit=5.0) Same as buffer(), but allows customizing the style of the buffer. • end_cap_style can be round (1), flat (2), or square

assigns the HttpRequest to the view’s request attribute, and any positional and/or keyword arguments cap- tured from the URL pattern to the args and kwargs attributes, respectively. Then dispatch() is called buffer_with_style(width, quadsegs=8, end_cap_style=1, join_style=1, mitre_limit=5.0) Same as buffer(), but allows customizing the style of the buffer. • end_cap_style can be round (1), flat (2), or square

assigns the HttpRequest to the view’s request attribute, and any positional and/or keyword arguments cap- tured from the URL pattern to the args and kwargs attributes, respectively. Then dispatch() is called buffer_with_style(width, quadsegs=8, end_cap_style=1, join_style=1, mitre_limit=5.0) Same as buffer(), but allows customizing the style of the buffer. • end_cap_style can be round (1), flat (2), or square

assigns the HttpRequest to the view’s request attribute, and any positional and/or keyword arguments cap- tured from the URL pattern to the args and kwargs attributes, respectively. Then dispatch() is called buffer_with_style(width, quadsegs=8, end_cap_style=1, join_style=1, mitre_limit=5.0) Same as buffer(), but allows customizing the style of the buffer. • end_cap_style can be round (1), flat (2), or square

assigns the HttpRequest to the view’s request attribute, and any positional and/or keyword arguments cap- tured from the URL pattern to the args and kwargs attributes, respectively. Then dispatch() is called buffer_with_style(width, quadsegs=8, end_cap_style=1, join_style=1, mitre_limit=5.0) Same as buffer(), but allows customizing the style of the buffer. • end_cap_style can be round (1), flat (2), or square

assigns the HttpRequest to the view’s request attribute, and any positional and/or keyword arguments cap- tured from the URL pattern to the args and kwargs attributes, respectively. Then dispatch() is called buffer_with_style(width, quadsegs=8, end_cap_style=1, join_style=1, mitre_limit=5.0) Same as buffer(), but allows customizing the style of the buffer. • end_cap_style can be round (1), flat (2), or square

assigns the HttpRequest to the view’s request attribute, and any positional and/or keyword arguments cap- tured from the URL pattern to the args and kwargs attributes, respectively. Then dispatch() is called buffer_with_style(width, quadsegs=8, end_cap_style=1, join_style=1, mitre_limit=5.0) Same as buffer(), but allows customizing the style of the buffer. • end_cap_style can be round (1), flat (2), or square

buffer_with_style(width, quadsegs=8, end_cap_style=1, join_style=1, mitre_limit=5.0) Same as buffer(), but allows customizing the style of the buffer. • end_cap_style can be round (1), flat (2), or square