Question

Django 1.11.4

以下是DTL。

你能看一下下面的追溯吗？这个问题与＆＃34; | add：container_classes＆＃34;有关。如果我删除它，模板就不会爆炸。

好吧，我试验过：

打印变量。它确实打印。
将变量更改为字符串。

嗯，实验有效：渲染模板。并且打印变量。容器上了班级＆＃34; abracadabra＆＃34;。

稍后添加：

并且实验2工作正常。我的意思是一切都好：没有错误，像预期的那样将类添加到html中。

你能帮我一把吗？

模板

        {% include 'general/inclusions/container/container_block_begin.html' with id_suffix=id classes="margin-top-10 margin-left-10 "|add:container_classes %}

             ...something

        {% include 'general/inclusions/container/container_block_end.html' with id_suffix=id%}

回溯

VariableDoesNotExist at /frames/2/
Failed lookup for key [container_classes] in "[{'True': True, 'False': False, 'None': None}, {}, {}, {'object': <Frame: 2>, 'frame': <Frame: 2>, 'view': <frames.views.FrameDetailView object at 0x7fef6647fcf8>}]"

实验

{{ container_classes }}
{% include 'general/inclusions/container/container_block_begin.html' with id_suffix=id classes="margin-top-10 margin-left-10 "|add:"abracadabra" %}

                     ...something        

{% include 'general/inclusions/container/container_block_end.html' with id_suffix=id%}

experiment_2

        {% with container_classes=container_classes %}
        {% include 'general/inclusions/container/container_block_begin.html' with id_suffix=id classes="margin-top-10 margin-left-10 "|add:container_classes %}

                     ...something            

        {% include 'general/inclusions/container/container_block_end.html' with id_suffix=id%}
        {% endwith %}

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