pylons mako 摘录笔记

zuroc

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pylons mako笔记

1.

在pylons中设置为utf-8编码

在pylons工程config/environment.py文件最后，添加

tmpl_options['mako.default_filters'] = ['decode.utf8']

2.

${}中间直接是python代码,显示其返回值

this is x: ${x}

pythagorean theorem: ${pow(x,2) + pow(y,2)}

3.

${"this is some text" | u}

u : url编码this+is+some+text
h : html编码
x : xml编码
trim : whitespace trimming, provided by string.strip()
n : disable all default filtering; only filters specified in the local expression tag will be applied.

自定义filter
<%!
    def myescape(text):
        return "<TAG>" + text + "</TAG>"
%>

Heres some tagged text: ${"text" | myescape}

Or from any Python module:

<%!
    import myfilters
%>

Heres some tagged text: ${"text" | myfilters.tagfilter}

默认过滤器

<%page expression_filter="h"/>

Escaped text: ${"<html>some html</html>"}

可以在配置中定义默认的filter
t = TemplateLookup(directories=['/tmp'],
    default_filters=['unicode', 'myfilter'],
    imports=['from mypackage import myfilter']

禁用其他,只用trim
${'myexpression' | n, trim}

函数也可以用

<%def name="foo()" filter="h, trim">
    <b>this is bold</b>
</%def>

4.

控制语句

% for a in ['one', 'two', 'three', 'four', 'five']:
    % if a[0] == 't':
     its two or three
    % elif a[0] == 'f':
    four/five
    % else:
    one
    %endif
% endfor

直接编写python代码
<%
    x = db.get_resource('foo')
    y = [z.element for z in x if x.frobnizzle==5]
%>

模块级别的代码
<%!
    import mylib
    import re

    def filter(text):
        return re.sub(r'^@', '', text)
%>

5.

单行注释
## this is a comment.

多行注释
<%doc>
    these are comments
    more comments
</%doc>

6.
标签

包含,可以有变量
<%include file="foo.txt"/>
<%include file="/foo/bar/${myfile}.txt"/>

定义类似函数html文本段
${account()}

<%def name="account()">
    Account for ${username}:<br/>

    % for row in accountdata:
        Value: ${row}<br/>
    % endfor
</%def>

定义该页模板的参数
<%page cached="True" cache_type="memory"/>

名字空间
<%namespace file="functions.html" import="*"/>

<%namespace name="mystuff" file="mystuff.html"/>

${mystuff.somedef(x=5,y=7)}

The <%namespace> tag also supports some of the other semantics of Python's import statement, including pulling names into the local variable space, or using * to represent all names, using the import attribute:

<%namespace file="mystuff.html" import="foo, bar"/>

继承
## base.html
<html>
    <body>
        <div class="header">
            ${self.header()}
        </div>

        ${self.body()}

        <div class="footer">
            ${self.footer()}
        </div>
    </body>
</html>

<%def name="footer()">
    this is the footer
</%def>

this is the body content.

也可以用
    ${next.body()}
表示下一级继承页面
用
    ${parent.toolbar()}
访问上一层
----------------------------------

## index.html
<%inherit file="base.html"/>

<%def name="header()">
    this is some header content
</%def>

纯文本
<%text filter="h">
    heres some fake mako ${syntax}
    <%def name="x()">${x}</%def>
</%text>

8.
函数更多用法演示:

缓存
<%def name="somedef()" buffered="true">
    somedef's results
</%def>
----------------------------------
${account(accountname='john')}

<%def name="account(accountname, type='regular')">
    account name: ${accountname}, type ${type}
</%def>
----------------------------------
嵌套函数
<%def name="mydef()">
    <%def name="subdef()">
        a sub def
    </%def>

    im the def, and the subcomopnent is ${subdef()}
</%def>
----------------------------------
调用者
<%def name="buildtable()">
    <table>
        <tr><td>
            ${caller.body()}
        </td></tr>
    </table>
</%def>

<%call expr="buildtable">
    I am the table body.
</%call>

输出
<table>
    <tr><td>
        I am the table body.
    </td></tr>
</table>

----------------------------------

<%def name="lister(count)">
    % for x in range(1,count):
        ${caller.body()}
    % endfor
</%def>

<%call expr="lister(3)">
    hi
</%call>

输出
hi
hi
hi

----------------------------------

<%def name="conditional(expr)">
    % if expr:
        ${caller.body()}
    % endif
</%def>

<%call expr="conditional(4==4)">
    im the result
</%call>

----------------------------------

<%def name="layoutdata(somedata)">
    <table>
    % for item in somedata:
        <tr>
        % for col in item:
            <td>${caller.body(col=col)}</td>\
        % endfor
        </tr>
    % endfor
    </table>
</%def>

<%call expr="layoutdata([[1,2,3],[4,5,6],[7,8,9]])" args="col">
    Body data: ${col}
</%call>
输出:

<table>
    <tr>
        <td>Body data: 1</td><td>Body data: 2</td><td>Body data: 3</td>
        <td>Body data: 4</td><td>Body data: 5</td><td>Body data: 6</td>
        <td>Body data: 7</td><td>Body data: 8</td><td>Body data: 9</td>
    </tr>
</table>

----------------------------------

<%def name="layout()">
    ## a layout def
    <div class="mainlayout">
        <div class="header">
            ${caller.header()}
        </div>
        <div class="sidebar">
            ${caller.sidebar()}
        </div>
        <div class="content">
            ${caller.body()}
        </div>
    </div>
</%def>

## calls the layout def
<%call expr="layout">
    <%def name="header()">
        I am the header
    </%def>
    <%def name="sidebar()">
        <ul>
            <li>sidebar 1</li>
            <li>sidebar 2</li>
        </ul>
    </%def>

        this is the body
</%call>

输出

<div class="mainlayout">
    <div class="header">
        I am the header
    </div>
    <div class="sidebar">
        <ul>
            <li>sidebar 1</li>
            <li>sidebar 2</li>
        </ul>
    </div>
    <div class="content">
        this is the body
    </div>
</div>

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2008-03-27 20:48
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评论(8)
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8 楼 zuroc 2008-12-25

生成的代码有问题 ,生成的代码应该类似
        for k,v in unreview.items():
            # SOURCE LINE 28
            write('<h2>')
            write(filters.html_escape(str(k)))


我看你生成的代码(u'\r%f
都有个"\r"做为开头
我怀疑是换行的问题,
保存为linux的换行看看

7 楼 frankli 2008-12-25

${newinfo}
newinfo输出是(('6a526661d18a11dd898b0017317ff943', 'clsid1'), ('6a526662d18a11ddb8af0017317ff943', 'clsid2'))

%for x in newinfo:
%if x != "":
<b>${x[0]}</b><br>
%else:
<b>nothing</b>
%endif
%endfor

这个里面的newinfo是tuple的,我输出的时候他提示类型(我故意写错他会提示转型错误,所以我确认是tuple的);

6 楼 frankli 2008-12-25

我输入查看提示是tuple,我用LIST转后还是提示是这个错误,

        __M_writer(escape(newinfo))
        __M_writer(u'\r%for i in range(1,10):\r ')
        __M_writer(escape(i))
        __M_writer(u'\r%endfor \r\r\r<br>\r<br>\r<

这个是生成的模模版代码;提示本行的i没有定义.

5 楼 zuroc 2008-12-24

估计里面有个东西既不是空字符串,也不是tuple

4 楼 zuroc 2008-12-24

1.开启缓存
2.看生成的代码

3 楼 frankli 2008-12-24

${newinfo}
newinfo输出是(('6a526661d18a11dd898b0017317ff943', 'clsid1'), ('6a526662d18a11ddb8af0017317ff943', 'clsid2'))

%for x in newinfo:
%if x != "":
<b>${x[0]}</b><br>
%else:
<b>nothing</b>
%endif
%endfor

报错:TypeError: 'Undefined' object is unindexable
这是以前的代码，有结束符的，我测试${x}就输出全是字会串，如果${x[0]}就是上面的报错；
我找了两天了还没有找到问题。麻烦您给指点一下。谢谢。

2 楼 zuroc 2008-12-24

for ... :

1 楼 frankli 2008-12-24

您好,我安装了Mako-0.2.3+pylons-dev-15206414f9ff,但是在MAKO模版文件里控制语句
%for i in range(1,10)
${i}
%endfor

这个一直是输出是字符串,找了好久也没有解决这个问题.不知道能否抽时间交流一下.谢谢.

QQ52522835/frankli.sh@gmail.com

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