MVVM模式不但可用于Form表單，在復雜的管理頁面中也能大顯身手。例如，分頁顯示Blog的功能，我們先把后端代碼寫出來： 在`apis.py`中定義一個`Page`類用于存儲分頁信息： ~~~ class Page(object): def __init__(self, item_count, page_index=1, page_size=10): self.item_count = item_count self.page_size = page_size self.page_count = item_count // page_size + (1 if item_count % page_size > 0 else 0) if (item_count == 0) or (page_index > self.page_count): self.offset = 0 self.limit = 0 self.page_index = 1 else: self.page_index = page_index self.offset = self.page_size * (page_index - 1) self.limit = self.page_size self.has_next = self.page_index < self.page_count self.has_previous = self.page_index > 1 def __str__(self): return 'item_count: %s, page_count: %s, page_index: %s, page_size: %s, offset: %s, limit: %s' % (self.item_count, self.page_count, self.page_index, self.page_size, self.offset, self.limit) __repr__ = __str__ ~~~ 在`handlers.py`中實現API： ~~~ @get('/api/blogs') def api_blogs(*, page='1'): page_index = get_page_index(page) num = yield from Blog.findNumber('count(id)') p = Page(num, page_index) if num == 0: return dict(page=p, blogs=()) blogs = yield from Blog.findAll(orderBy='created_at desc', limit=(p.offset, p.limit)) return dict(page=p, blogs=blogs) ~~~ 管理頁面： ~~~ @get('/manage/blogs') def manage_blogs(*, page='1'): return { '__template__': 'manage_blogs.html', 'page_index': get_page_index(page) } ~~~ 模板頁面首先通過API：`GET /api/blogs?page=?`拿到Model： ~~~ { "page": { "has_next": true, "page_index": 1, "page_count": 2, "has_previous": false, "item_count": 12 }, "blogs": [...] } ~~~ 然后，通過Vue初始化MVVM： ~~~ <script> function initVM(data) { var vm = new Vue({ el: '#vm', data: { blogs: data.blogs, page: data.page }, methods: { edit_blog: function (blog) { location.assign('/manage/blogs/edit?id=' + blog.id); }, delete_blog: function (blog) { if (confirm('確認要刪除“' + blog.name + '”？刪除后不可恢復！')) { postJSON('/api/blogs/' + blog.id + '/delete', function (err, r) { if (err) { return alert(err.message || err.error || err); } refresh(); }); } } } }); $('#vm').show(); } $(function() { getJSON('/api/blogs', { page: {{ page_index }} }, function (err, results) { if (err) { return fatal(err); } $('#loading').hide(); initVM(results); }); }); </script> ~~~ View的容器是`#vm`，包含一個table，我們用`v-repeat`可以把Model的數組`blogs`直接變成多行的``： ~~~ <div id="vm" class="uk-width-1-1"> <a href="/manage/blogs/create" class="uk-button uk-button-primary"><i class="uk-icon-plus"></i> 新日志</a> <table class="uk-table uk-table-hover"> <thead> <tr> <th class="uk-width-5-10">標題 / 摘要</th> <th class="uk-width-2-10">作者</th> <th class="uk-width-2-10">創建時間</th> <th class="uk-width-1-10">操作</th> </tr> </thead> <tbody> <tr v-repeat="blog: blogs" > <td> <a target="_blank" v-attr="href: '/blog/'+blog.id" v-text="blog.name"></a> </td> <td> <a target="_blank" v-attr="href: '/user/'+blog.user_id" v-text="blog.user_name"></a> </td> <td> <span v-text="blog.created_at.toDateTime()"></span> </td> <td> <a href="#0" v-on="click: edit_blog(blog)"><i class="uk-icon-edit"></i> <a href="#0" v-on="click: delete_blog(blog)"><i class="uk-icon-trash-o"></i> </td> </tr> </tbody> </table> <div v-component="pagination" v-with="page"></div> </div> ~~~ 往Model的`blogs`數組中增加一個Blog元素，table就神奇地增加了一行；把`blogs`數組的某個元素刪除，table就神奇地減少了一行。所有復雜的Model-View的映射邏輯全部由MVVM框架完成，我們只需要在HTML中寫上`v-repeat`指令，就什么都不用管了。 可以把`v-repeat="blog: blogs"`看成循環代碼，所以，可以在一個``內部引用循環變量`blog`。`v-text`和`v-attr`指令分別用于生成文本和DOM節點屬性。 完整的Blog列表頁如下：  ### 參考源碼 [day-12](https://github.com/michaelliao/awesome-python3-webapp/tree/day-12)