不为空时更改为ImageField显示的默认文本

问题描述：

我有以下字段:

photo = models.ImageField(null=True,blank=True,upload_to="product_images")

我在 forms.py 中为此字段定义了以下布局:

I have defined the following layout in forms.py for this field:

self.fields['photo'].label = "Asset Image"
self.helper.layout = Layout(
    'photo',
    HTML("""{% if form.photo.value %}
               <img height="80"
                    width="160"
                    class="pull-left"
                    src="{{ MEDIA_URL }}{{ form.photo.value }}">
             {% endif %}""", ),

现在，我可以上传与此特定字段相关的图像了.但是，当我尝试更新图像时，我在模板中看到以下内容:

Now I can upload images associated with this particular field just fine. However when I try to update the image I see the following in my template:

有什么方法可以更改布局，以便在图像字段不为空时仅显示浏览按钮和现有图像?换句话说，删除文本当前:product_images/km_2.jpeg清除更改:

Is there any way I can change the layout so that only the browse button and existing image are shown when the image field is not empty? In other words, remove the text Currently: product_images/km_2.jpeg Clear Change:

答

我很确定 ImageField 使用 ClearableFileInput 来呈现HTML.

I'm pretty sure ImageField uses ClearableFileInput in order to render the HTML.

因此，要摆脱当前:...清除"内容，您需要将 ClearableFileInput 子类化，并修改 template_with_clear 和/或 template_with_initial 成员.

So to get rid of the "Currently: ... Clear" stuff you need to subclass the ClearableFileInput and modify the template_with_clear and/or template_with_initial members.

from django.forms import ClearableFileInput

class MyClearableFileInput(ClearableFileInput):
     template_with_initial = '%(input_text)s: %(input)s'

随后，您使用 MyClearableFileInput ，例如:

class MyForm(ModelForm):

    class Meta:
        model = MyModel
        widgets = {
            "file": MyClearableFileInput(),
        }

我使用 FileField 对此进行了测试，但是我很确定它也可以与 ImageField 一起使用.

I tested this with a FileField, but I'm pretty sure it will also work with an ImageField.

不为空时更改为ImageField显示的默认文本

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