How to use ModelForm in Django?

In Django, ModelForm is used to create forms based on a model. Here are the basic steps for using ModelForm:

1. Create a form class that inherits from django.forms.ModelForm and specify the model attribute as the model to base it on.

from django import forms
from myapp.models import MyModel

class MyModelForm(forms.ModelForm):
    class Meta:
        model = MyModel
        fields = '__all__'  # 或者指定需要的字段

1. Use ModelForm in the view to handle form data.

from myapp.forms import MyModelForm

def my_view(request):
    if request.method == 'POST':
        form = MyModelForm(request.POST)
        if form.is_valid():
            form.save()
            # 处理表单提交成功后的逻辑
    else:
        form = MyModelForm()
    
    return render(request, 'my_template.html', {'form': form})

1. Using ModelForm form fields in a template:

<form method="post">
    {% csrf_token %}
    {{ form.as_p }}
    <button type="submit">提交</button>
</form>

By following the above steps, you can use ModelForm in Django to create model-based forms, handling form data validation and saving.