如何在Django表单中自定义错误消息

from django import forms

class MyForm(forms.Form):
    field1 = forms.CharField()
    field2 = forms.EmailField()
    # 添加其他字段...

class MyForm(forms.Form):
    field1 = forms.CharField(
        error_messages={
            'required': '自定义错误消息1',
            'invalid': '自定义错误消息2'
        }
    )
    field2 = forms.EmailField(
        error_messages={
            'required': '自定义错误消息3',
            'invalid': '自定义错误消息4'
        }
    )
    # 添加其他字段...

class MyForm(forms.Form):
    field1 = forms.CharField(
        error_messages={
            'required': '字段1不能为空',
            'invalid': '字段1的值%(value)s无效'
        }
    )
    field2 = forms.EmailField(
        error_messages={
            'required': '字段2不能为空',
            'invalid': '字段2的值%(value)s无效'
        }
    )
    # 添加其他字段...

from django.shortcuts import render

def my_view(request):
    if request.method == 'POST':
        form = MyForm(request.POST)
        if form.is_valid():
            # 表单有效，执行相应操作
            pass
        else:
            # 表单无效，获取自定义错误消息
            error_messages = form.errors.as_data()
            # 处理错误消息...
    else:
        form = MyForm()
    
    return render(request, 'my_template.html', {'form': form})