Django 之 modelForm （edit.html页面的编写）

models.py文件　　

from django.db import models

# Create your models here.
from django.db import models


# Create your models here.
class Author(models.Model):
    nid = models.AutoField(primary_key=True)
    name = models.CharField(max_length=32)
    age = models.IntegerField()

    # 与AuthorDetail建立一对一的关系
    authorDetail = models.OneToOneField(to="AuthorDetail", on_delete=models.CASCADE)

    def __str__(self):
        return self.name


class AuthorDetail(models.Model):
    nid = models.AutoField(primary_key=True)
    birthday = models.DateField()
    telephone = models.BigIntegerField()
    addr = models.CharField(max_length=64)

    def __str__(self):
        return str(self.telephone)

class Publish(models.Model):
    nid = models.AutoField(primary_key=True)
    name = models.CharField(max_length=32)
    city = models.CharField(max_length=32)
    email = models.EmailField()

    def __str__(self):
        return self.name

class Book(models.Model):
    nid = models.AutoField(primary_key=True, verbose_name="ID")
    title = models.CharField(max_length=32, verbose_name="书名")
    publishDate = models.DateField()
    price = models.DecimalField(max_digits=5, decimal_places=2, verbose_name="价格")

    # 与Publish建立一对多的关系,外键字段建立在多的一方
    publish = models.ForeignKey(to="Publish", to_field="nid", on_delete=models.CASCADE)
    # 与Author表建立多对多的关系,ManyToManyField可以建在两个模型中的任意一个，自动创建第三张表
    authors = models.ManyToManyField(to='Author', )

    def __str__(self):
        return self.title

　

   在view的  edit 方法里：　　　　

class ModelStark：
    # 获取modelform类
    @property
    def modelform_class(self):
        if self.modelfoem_class:
            return self.modelfoem_class
        else:
            class ModelFormClass(forms.ModelForm):
                class Meta:
                    model = self.model
                    fields = '__all__'

            return ModelFormClass

    # 改
    def edit(self, request, id):
        model_obj = self.model.objects.get(pk=id)
        if request.method == 'GET':
            # 生成一个带有model对象内容的modelform对象
            form = self.modelform_class(instance=model_obj)
            return render(request, 'stark/edit.html', {'form': form})
        else:
            form = self.modelform_class(request.POST, instance=model_obj)
            if form.is_valid():
                form.save()
                _url = self.get_url('list')
                return redirect(_url)
            else:
                return render(request, 'stark/edit.html', {'form': form})

 在html页面里：　　　　

<form action="" method="post" novalidate>
    {% csrf_token %}

    {% for field in form %}
        <div class="form-group">
            <label for="">{{ field.label }}</label>
            {{ field }}

            {% if field.is_pop %}
                <a class="pull-right addfield-type" onclick="add_page('{{ field.url }}')">
　　　　　　　　　　　　<span class="glyphicon glyphicon-plus"></span>
　　　　　　　　　　</a>
            {% endif %}
            <span class="erorr ">{{ field.errors.0 }}</span>
        </div>
    {% endfor %}
    <button type="submit" name="submit" value="提交">提交</button>
</form>