如何在django表单中格式化用户的输入

Question

如何强制用户使用格式化输入 name.extention

我需要在表单中实现两种格式：

1. 用户只能输小写字母（不允许使用大写字母） 需要tagName字段
2. 对于另一个字段，用户需要输入filename.extentio（server.js）需要文件名字段

如何在我的Django表单或模板中实现这两个场景

forms.py

from django import forms


class BuildImageForm(forms.Form):
    instances = forms.CharField(max_length=255)
    tagName = forms.CharField(max_length=255)

buildImage.html

<div class="form-group">
      <span class="col-md-1 col-md-offset-2 text-center"><label for="package">Docker Image Tag Name:</label></span>
       <div class="col-md-8">
       <input  type="text" name="tagName"  id="tagName" placeholder="e.g node_image/istiogui" class="form-control" required>
       /div>
      <div class="col-md-8">
       <input  type="text" name="filename"  id="fileName" placeholder="e.g server.js" class="form-control" required>
       /div>
</div>

Answer 1

您的表格：

class BuildImageForm(forms.Form):
    instances = forms.CharField(max_length=255)
    tagName = forms.CharField(max_length=255)


    def clean_instances(self, *args, **kwargs):
        instances = self.cleaned_data.get("instances").lower()
        return instances

    def clean_tagName(self, *args, **kwargs):
        tagName = self.cleaned_data.get("tagName")
        if tagName[-3:] == '.js'
            return tagName
        return ValidationError('Invalid value')

您的观点：

def your_view(request):
    form = BuildImageForm(request.POST or None)

    if request.method == 'POST':
        form = BuildImageForm(request.POST or None)
        if form.is_valid():
            # Or Use in valid form
            item = form.commit(commit=False)
            item.instances = item.instances.lower()
            item.save()
     return ...