Question

I’m getting the following error:

Exception Type: TemplateSyntaxError
Exception Value: 'for' statements should use the format 'for x in y': for (var i=0, file; file=o.files[i]; i++) {

But I can’t figure out how to escape it in Django, I’ve added {% autoescape off %} tags but still, no luck.

Here is the code causing the error:

{% for (var i=0, file; file=o.files[i]; i++) { %}
    <tr class="template-upload fade">
        <td class="preview"><span class="fade"></span></td>
        <td class="name"><span>{%=file.name%}</span></td>
        <td class="size"><span>{%=o.formatFileSize(file.size)%}</span></td>
        {% if (file.error) { %}
        <td class="error" colspan="2"><span class="label label-important">{%=locale.fileupload.error%}</span> {%=locale.fileupload.errors[file.error] || file.error%}</td>
        {% } else if (o.files.valid && !i) { %}
        <td>
            <div class="progress progress-success progress-striped active" role="progressbar" aria-valuemin="0" aria-valuemax="100" aria-valuenow="0"><div class="bar" style="width:0%;"></div></div>
        </td>
        <td class="start">{% if (!o.options.autoUpload) { %}
            <button class="btn btn-primary">
                <i class="icon-upload icon-white"></i>
                <span>{%=locale.fileupload.start%}</span>
            </button>
            {% } %}</td>
        {% } else { %}
        <td colspan="2"></td>
        {% } %}
        <td class="cancel">{% if (!i) { %}
            <button class="btn btn-warning">
                <i class="icon-ban-circle icon-white"></i>
                <span>{%=locale.fileupload.cancel%}</span>
            </button>
            {% } %}</td>
    </tr>
    {% } %}
</script>
<!-- The template to display files available for download -->
<script id="template-download" type="text/x-tmpl">
    {% for (var i=0, file; file=o.files[i]; i++) { %}
    <tr class="template-download fade">
        {% if (file.error) { %}
        <td></td>
        <td class="name"><span>{%=file.name%}</span></td>
        <td class="size"><span>{%=o.formatFileSize(file.size)%}</span></td>
        <td class="error" colspan="2"><span class="label label-important">{%=locale.fileupload.error%}</span> {%=locale.fileupload.errors[file.error] || file.error%}</td>
        {% } else { %}
        <td class="preview">{% if (file.thumbnail_url) { %}
            <a href="{%=file.url%}" title="{%=file.name%}" rel="gallery" download="{%=file.name%}"><img src="{%=file.thumbnail_url%}"></a>
            {% } %}</td>
        <td class="name">
            <a href="{%=file.url%}" title="{%=file.name%}" rel="{%=file.thumbnail_url&&'gallery'%}" download="{%=file.name%}">{%=file.name%}</a>
        </td>
        <td class="size"><span>{%=o.formatFileSize(file.size)%}</span></td>
        <td colspan="2"></td>
        {% } %}
        <td class="delete">
            <button class="btn btn-danger" data-type="{%=file.delete_type%}" data-url="{%=file.delete_url%}">
                <i class="icon-trash icon-white"></i>
                <span>{%=locale.fileupload.destroy%}</span>
            </button>
            <input type="checkbox" name="delete" value="1">
        </td>
    </tr>
    {% } %}

I’m using the jQuery File Upload (jquery ui version) plugin. Can anyone explain to me how I can fix this?

Answer 1

Yo it’s pythonic, so it iterates like for loops in python: http://docs.python.org/tutorial/controlflow.html#for-statements
So the for statement would look more like {% for file in o.files %} rather than your C-syntactical for loop.

Also see the official django documentation for for loops: https://docs.djangoproject.com/en/dev/ref/templates/builtins/#for

Looking at the rest of your code more closely, it seems like you have a lot of strange syntax in your template code (e.g. {%=file.name%} should be {% file.name %}, {% if (!o.options.autoUpload) { %} should be {% if not o.options.autoUpload %}, etc.) You might check the djangobook chapter on templates:
http://djangobook.com/en/2.0/chapter04/

Edit: The source uses template code syntax from JavaScript Templates, not Django, which would seem to be the issue.