http://uralbash.ru/blog/category/python/atom.xml 2013-02-28T22:49:00Z ABlog http://uralbash.ru/articles/2013/flag_jinja2/ 2013-02-28T22:49:00Z 2013-02-28T22:49:00Z Uralbash <div class="section" id="jinja2"> <p>Понадобилось мне тут создать флаг в цикле, который можно использовать где нибудь потом в шаблоне. По логике все должно выглядеть примерно так:</p> <div class="highlight-jinja"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">set</span> <span class="nv">exists</span> <span class="o">=</span> <span class="m">0</span> <span class="cp">%}</span><span class="x"></span> <span class="cp">{%</span> <span class="k">for</span> <span class="nv">i</span> <span class="k">in</span> <span class="nv">range</span><span class="o">(</span><span class="m">5</span><span class="o">)</span> <span class="cp">%}</span><span class="x"></span> <span class="x"> </span><span class="cp">{%</span> <span class="k">if</span> <span class="kp">True</span> <span class="cp">%}</span><span class="x"></span> <span class="x"> </span><span class="cp">{%</span> <span class="k">set</span> <span class="nv">exists</span> <span class="o">=</span> <span class="m">1</span> <span class="cp">%}</span><span class="x"></span> <span class="x"> </span><span class="cp">{%</span> <span class="k">endif</span> <span class="cp">%}</span><span class="x"></span> <span class="cp">{%</span> <span class="k">endfor</span> <span class="cp">%}</span><span class="x"></span> <span class="cp">{%</span> <span class="k">if</span> <span class="nv">exists</span> <span class="cp">%}</span><span class="x"></span> <span class="x"> &lt;!-- exists is true --&gt;</span> <span class="cp">{%</span> <span class="k">endif</span> <span class="cp">%}</span><span class="x"></span> </pre></div> </div> <p>Но такой код не фурычит! <code class="docutils literal"><span class="pre">exist</span></code> всегда будет <code class="docutils literal"><span class="pre">0</span></code>. Это особенность области видимости переменных в <a class="reference external" href="http://jinja.pocoo.org/">Jinja</a> при присваивании.</p> <p>Поэтому есть небольшой хак как это поправить:</p> <div class="highlight-jinja"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">set</span> <span class="nv">exists</span> <span class="o">=</span> <span class="o">[]</span> <span class="cp">%}</span><span class="x"></span> <span class="cp">{%</span> <span class="k">for</span> <span class="nv">i</span> <span class="k">in</span> <span class="nv">range</span><span class="o">(</span><span class="m">5</span><span class="o">)</span> <span class="cp">%}</span><span class="x"></span> <span class="x"> </span><span class="cp">{%</span> <span class="k">if</span> <span class="kp">True</span> <span class="cp">%}</span><span class="x"></span> <span class="x"> </span><span class="cp">{%</span> <span class="k">do</span> <span class="nv">exists.append</span><span class="o">(</span><span class="m">1</span><span class="o">)</span> <span class="cp">%}</span><span class="x"></span> <span class="x"> </span><span class="cp">{%</span> <span class="k">endif</span> <span class="cp">%}</span><span class="x"></span> <span class="cp">{%</span> <span class="k">endfor</span> <span class="cp">%}</span><span class="x"></span> <span class="cp">{%</span> <span class="k">if</span> <span class="nv">exists</span> <span class="cp">%}</span><span class="x"></span> <span class="x"> &lt;!-- exists is true --&gt;</span> <span class="cp">{%</span> <span class="k">endif</span> <span class="cp">%}</span><span class="x"></span> </pre></div> </div> <p>Решение взято от <a class="reference external" href="http://stackoverflow.com/questions/4870346/can-a-jinja-variables-scope-extend-beyond-in-an-inner-block">сюда</a>.</p> </div> http://uralbash.ru/articles/2013/jinja2_lorem_ipsum/ 2013-02-19T03:12:00Z 2013-02-19T03:12:00Z Uralbash <div class="section" id="jinja2-lorem-ipsum-dolor-sit-amet"> <p>Иногда в шаблоне нужно зафигачить какую-нибудь рыбу типа <code class="docutils literal"><span class="pre">&quot;Lorem</span> <span class="pre">ipsum</span> <span class="pre">dolor</span> <span class="pre">sit</span> <span class="pre">amet&quot;</span></code>, часто в цикле итд. Для этого существует функция <a class="reference external" href="http://jinja.pocoo.org/docs/dev/templates/#lipsum">lipsum()</a>.</p> <p>Вот пример:</p> <div class="highlight-html+jinja"><div class="highlight"><pre><span></span><span class="cp">{%</span> <span class="k">for</span> <span class="nv">x</span> <span class="k">in</span> <span class="nv">range</span><span class="o">(</span><span class="m">5</span><span class="o">)</span> <span class="cp">%}</span> <span class="cp">{{</span> <span class="nv">lipsum</span><span class="o">()|</span><span class="nf">truncate</span><span class="o">(</span><span class="m">150</span><span class="o">)|</span><span class="nf">safe</span> <span class="cp">}}</span> <span class="p">&lt;</span><span class="nt">hr</span><span class="p">&gt;</span> <span class="cp">{%</span> <span class="k">endfor</span> <span class="cp">%}</span> </pre></div> </div> <p>И результат:</p> Justo aliquam faucibus lacus pulvinar commodo nisl, quisque est fusce venenatis mattis magnis arcu, hac felis parturient suspendisse a. Vitae ... <hr> Porta tellus turpis leo suspendisse rutrum metus blandit, montes dis lacinia felis non, vehicula vivamus condimentum luctus massa, vehicula ... <hr> Convallis molestie blandit viverra imperdiet eros dolor nam, ridiculus tortor duis blandit duis enim, cursus bibendum lobortis faucibus dui ... <hr> Diam placerat risus porta litora consequat vel, accumsan tempus ligula laoreet a mollis rutrum, aptent est tortor pulvinar senectus, litora etiam. ... <hr> Cursus non morbi non proin, porttitor consequat eget ac eget netus penatibus, egestas primis suspendisse ad, iaculis eu cursus urna blandit, leo. ... <hr></div>