Django ModelForm组件

代码

from django import forms
from django.forms import widgets as wig  # 因为重名，所以起个别名
from django.shortcuts import render

from app01.models import Book


class BookModel(forms.ModelForm):
    class Meta:
        model = Book  # 对应的model对象
        # 包括哪些字段
        fields = "__all__"
        # fields = ['title','price']
        # 不包括
        # exclude = ['title']
        labels = {
            'title': '书籍名称',
            'price': '价格'
        }
        error_messages = {
            'title': {'required': '标题错误'},
            'price': {'required': '价格输入有误'}
        }
        widgets = {
            "title": wig.TextInput(attrs={'class': 'c1'})
        }
#钩子函数和form一样
    def clean_price(self):
        pass

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        for fields in self.fields.values():
            fields.widget.attrs.update({'class': 'form-control'})


# Create your views here.
def index(request):
    if request.method == "GET":
        # 模型直接渲染页面
        book = BookModel()

        # 带值，渲染
        book = BookModel(instance=Book.objects.filter(pk=1).first())

        return render(request, '1.html', locals())
    else:
        book = BookModel(request.POST)
        if book.is_valid():
            # 数据直接存储到数据库
            book.save()
            # book = BookModel(request.POST,instance=book_01) 指定了对应到图书内容
            # book.save()  #这里就update操作

        return render(request, '1.html', locals())