django S3-修剪imagefield文件名但不修剪url路径 [英] django S3 - trim imagefield filename but not the url path

问题描述

这是我在这里的问题的跟进:

this is a followup to my question here: ImageField / FileField Django form Currently unable to trim the path to filename

在我的Django应用中，有一个图像字段已上传到S3 修剪图像文件路径名后，由于修剪了URL，因此无法访问该图像.如何修剪显示但不修剪路径?

In my Django app, there is an imagefield uploaded to S3 After trim the imagefile path name, the image is not accessible because the url is trimmed. How can I trim the display but don't trim the path?

我设法修整了这样的显示文件名的显示

I manage to trim the display showing the filename like this

class CustomClearableFileInput(ClearableFileInput):

    def get_context(self, name, value, attrs):
        logging.debug("%s",name)
        logging.debug("%s",value)
        value.name = path.basename(value.name)
        context = super().get_context(name, value, attrs)       
        return context

    class CompanySettingEdit(forms.ModelForm):
       company_logo = forms.ImageField(widget=CustomClearableFileInput)

这是输出:

https://imgur.com/a/M42Mz <-- display correct
https://bucketname.s3.amazonaws.com/media/certiport_logo.png <-- invalid url

如果我不修剪它:

class CustomClearableFileInput(ClearableFileInput):

    def get_context(self, name, value, attrs):
        logging.debug("%s",name)
        logging.debug("%s",value)
        # value.name = path.basename(value.name) <-- remove this
        context = super().get_context(name, value, attrs)       
        return context

    class CompanySettingEdit(forms.ModelForm):
       company_logo = forms.ImageField(widget=CustomClearableFileInput)

这是输出:

https://imgur.com/a/rGi8f <-- display incorrect
https://bucketname.s3.amazonaws.com/media/company_logo/15/certiport_logo.png <--valid url

我的目标是:

display: certiport_logo.png
url: https://bucketname.s3.amazonaws.com/media/company_logo/15/certiport_logo.png

我该如何实现?

推荐答案

FileField/ImageField的url属性是动态的:它依赖于name属性，就像str()在调用时一样.相反，让我们写name以外的内容，然后更改模板以使用它:

The url property of a FileField/ImageField is dynamic: it depends on the name attribute just as str() does at the time it is called. Instead, let's write to something besides name and change the template to use it instead:

class CustomClearableFileInput(ClearableFileInput):
    template_name = 'path/to/clearable_file_input.html'
    # less confusing place than get_context...
    def format_value(self, value):
        if self.is_initial(value):
            value.basename = path.basename(value.name)
            return value

对于模板(从django来源修改并漂亮地打印出来)

And for the template (modified and pretty printed from django source)

{% if widget.is_initial %}
    {{ widget.initial_text }}: 
    <a href="{{ widget.value.url }}">
        {{ widget.value.basename }} {# <== CHANGE #}
    </a>
    {% if not widget.required %}
        <input type="checkbox" name="{{ widget.checkbox_name }}" id="{{ widget.checkbox_id }}" />
        <label for="{{ widget.checkbox_id }}">{{ widget.clear_checkbox_label }}</label>
    {% endif %}
    <br /> {{ widget.input_text }}:
{% endif %}
<input type="{{ widget.type }}" name="{{ widget.name }}"{% include "django/forms/widgets/attrs.html" %} />

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