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day85 ModuleForm Form组件

1 forms组件与modelform组件

forms组件：

https://www.cnblogs.com/yuanchenqi/articles/9036474.html
modelForm组件：
https://www.cnblogs.com/yuanchenqi/articles/8034442.html
增删改查----增改涉及form表单

https://www.kancloud.cn/cyyspring/django/619212

Form组件的功能： 1. 校验字段，2. 渲染页面，3.显示错误信息.

一、原生form 的表单增删改查.

1 .modules 文件

from django.db import models

# Create your models here.
class Book(models.Model):
    title =models.CharField(max_length=32)
    price =models.DecimalField(max_digits=8,decimal_places=2)
    pub_date =models.DateField()
    publishzd =models.ForeignKey('Publish')
    authors =models.ManyToManyField('Author')

class Publish(models.Model):
    name =models.CharField(max_length=32)

class Author(models.Model):
    name =models.CharField(max_length=32)

view文件

from django.shortcuts import render,redirect

# Create your views here.
from app01 import models
def books(request):

    book_list =models.Book.objects.all()
    return render(request,'book_list.html',{'book_list':book_list})


##添加页面
def addbook(request):
    if request.method=='POST':
        title =request.POST.get('title')
        price =request.POST.get('price')
        publishzd_id =request.POST.get('publish')
        pub_date =request.POST.get('pub_date')
        authors_pk_list =request.POST.getlist('authors')

        book=models.Book.objects.create(title =title ,price=price ,pub_date = pub_date,publishzd_id=publishzd_id)
        book.authors.set(authors_pk_list)

        models.Book.objects.filter(pk=id).update(title=title, price=price, pub_date=pub_date, publishzd_id=publishzd_id)
        book =models.Book.objects.filter(pk=id).first()
        book.authors.set(authors_pk_list)

        return  redirect('/books/')

    publish_list =models.Publish.objects.all()
    author_list =models.Author.objects.all()
    return render(request,'addbook.html',locals())


def changebook(request,id):
    if request.method=='POST':
        title =request.POST.get('title')
        price =request.POST.get('price')
        publishzd_id =request.POST.get('publish')
        pub_date =request.POST.get('pub_date')
        authors_pk_list =request.POST.getlist('authors')

        return redirect('/books/')

    publish_list =models.Publish.objects.all()
    author_list =models.Author.objects.all()
    book_edit =models.Book.objects.get(pk =id)

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


def deletebook(request,id):
    models.Book.objects.get(pk=id).delete()

    return redirect(('/books/'))

url 路由

"""day85 URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/1.11/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')
Including another URLconf
    1. Import the include() function: from django.conf.urls import url, include
    2. Add a URL to urlpatterns:  url(r'^blog/', include('blog.urls'))
"""
from django.conf.urls import url
from django.contrib import admin
from app01 import views
urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^books/$', views.books),
    url(r'^books/add/$', views.addbook),
    url(r'^books/(d+)/change/$', views.changebook),
    url(r'^books/(d+)/delete/$', views.deletebook),

]

View Code

html list页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<a href="/books/add/">添加书籍</a>


<ul>
    {% for book in book_list %}
    <li>{{ book.title }}===={{ book.price }}====={{ book.publishzd.name }}
        <a href="/books/{{ book.pk }}/change">编辑</a>
        <a href="/books/{{ book.pk }}/delete">删除</a>
    </li>

    {% endfor %}


</ul>
</body>
</html>

View Code

add book 页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>addbook</title>
</head>
<body>
<h1>添加页面</h1>
<form action=""method="post">
    {% csrf_token %}
    <p>书籍名称<input type="text" name="title"></p>
    <p>价格<input type="text" name="price"></p>
    <p>出版日期<input type="date" name="pub_date"></p>
    <p>
        <select name="publish" id="">
            {% for publish in publish_list %}
                <option value="{{ publish.pk }}">{{ publish.name }}</option>
            {% endfor %}

        </select>
    </p>
    <p>
        <select name="authors" id="" multiple>
            {% for author in author_list %}
                <option value="{{ author.pk }}">{{ author.name }}</option>
            {% endfor %}

        </select>
    </p>
    <input type="submit">
</form>
</body>
</html>

View Code

change 页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>changebook</title>
</head>
<body>
<h1>编辑页面</h1>
<form action="" method="post">
    {% csrf_token %}
    <p>书籍名称<input type="text" name="title" value="{{ book_edit.title }}"></p>
    <p>价格<input type="text" name="price" value="{{ book_edit.price }}"></p>
    <p>出版日期<input type="date" name="pub_date" value="{{ book_edit.pub_date|date:'Y-m-d' }}"></p>
    <p>
        <select name="publish" id="">
            {% for publish in publish_list %}
                {% if book_edit.publishzd == publish %}
                    <option selected value="{{ publish.pk }}">{{ publish.name }}</option>
                {% else %}
                    <option value="{{ publish.pk }}">{{ publish.name }}</option>
                {% endif %}
            {% endfor %}

        </select>
    </p>
    <p>
        <select name="authors" id="" multiple>
            {% for author in author_list %}
                {% if author in book_edit.authors.all %} }}
                    <option selected value="{{ author.pk }}">{{ author.name }}</option>
                {% else %}
                     <option value="{{ author.pk }}">{{ author.name }}</option>
                {% endif %}
            {% endfor %}
        </select>
    </p>
    <input type="submit" value="提交表单">
</form>
</body>
</html>

View Code

二、modelform组件功能

1. 校验字段数据

    forms组件
   （1）校验字段数据  
   
         from django import forms
         class UserForm(forms.Form):
            name = forms.CharField(max_length=32)
            age= forms.IntegerField()
            email = forms.EmailField()
            
            
        form=UserForm({"names":"alex","email":"123@qq.com","age":123})
         
        form=UserForm({"name":"alex"})
        
        form=UserForm({"name":"alex","email":"123@qq.com","age":123,"a":123})

配置文件放在view里面了

from django.shortcuts import render,redirect

# Create your views here.
from app01 import models
def books(request):

    book_list =models.Book.objects.all()
    return render(request,'book_list.html',{'book_list':book_list})



from django.forms import ModelForm
#将model 和from建立关系


#Modelform 将一个个的model转换成一个form组件
class BookModelForm(ModelForm):
    class Meta:
        model =models.Book
        fields='__all__' #转换所有的模型表（ Book表）
        fields=['title','price','pub_date']#也可以指定校验字段


def addbook(request):
    if request.method=="POST":

        form = BookModelForm(request.POST)
        if form.is_valid():
            form.save()  #等同于 create方法
            return redirect('/books/')
        else:
            return render(request, 'addbook2.html', locals())

    form = BookModelForm()
    return render(request, 'addbook2.html', locals())

def changebook(request,id):
    if request.method=='POST':
        book_edit=models.Book.objects.get(pk=id)
        form =BookModelForm(request.POST,instance=book_edit)

        if form.is_valid():
            form.save()#update方法，edit_book.update()
            return redirect('/books/')
        else:
            return render(request,'addbook2.html',locals())
    book_edit =models.Book.objects.get(pk =id)
    form = BookModelForm(instance=book_edit)
    return render(request,'changebook2.html',locals())

View Code

model 文件

from django.db import models

# Create your models here.
class Book(models.Model):
    title =models.CharField(max_length=32)
    price =models.DecimalField(max_digits=8,decimal_places=2)
    pub_date =models.DateField()
    publishzd =models.ForeignKey('Publish')
    authors =models.ManyToManyField('Author')

    def __str__(self):
        return self.title

class Publish(models.Model):
    name =models.CharField(max_length=32)
    def __str__(self):
        return self.name

class Author(models.Model):
    name =models.CharField(max_length=32)
    def __str__(self):
        return self.name

View Code

addbook html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>addbook</title>
</head>
<body>
<h1>添加页面</h1>
<form action=""method="post">
    {% csrf_token %}
   {{ form.as_p}}
    <input type="submit">
</form>
</body>
</html>

View Code

changebook html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>changebook</title>
</head>
<body>
<h1>编辑页面</h1>
<form action="" method="post">
    {% csrf_token %}
   {{ form.as_p }}
    <input type="submit" value="提交表单">
</form>
</body>
</html>

View Code

1. 创建 modelform类

2. 创建增add 和改 change

三、ModelForm的参数

#Modelform 将一个个的model转换成一个form组件
class BookModelForm(ModelForm):
    class Meta:
        model =models.Book
        fields='__all__' #转换所有的模型表（ Book表）
        # fields=['title','price','pub_date']#也可以指定校验字段

        labels ={'title':'书名','price':'价格'}

        error_messages={
            'title':{'require:'"书籍名称不能为空"}
              },

        widgets={
            'pub_date':wid.TextInput(attrs={'type':'date'})
        }

    def clean_title(self):
        return self.cleaned_data.get('title ')

View Code

整理的代码：

1. app01/xadmin.py

from Xadmin.service.Xadmin import site,ModelXadmin

from app01.models import *
from django.utils.safestring import mark_safe

class BookConfig(ModelXadmin):
    def edit(self,obj =None,is_header=False):
        if is_header:
            return "操作"
        #反向解析
        return mark_safe("<a herf ='%s/change'>编辑</a>"%obj.pk)
        #return mark_safe("<a href='%s/change'>编辑</a>" % obj.pk)

    def check(self,obj=None,is_header=False):
        if is_header:
            return "选择"

        return mark_safe("<input type ='checkbox'>")

    def delete(self, obj=None, is_header=False):
        if is_header:
            return "删除"

        return mark_safe('a href =''>删除 </a>')

    def display_authors(self,obj =None,is_header =False):
        if is_header:
            return '作者'
        # s =[]
        # # for author in obj.authors.all():
        # #     s.append(author.name)
        #
        # return mark_safe(','.join(s))

    # list_display = [check,'nid','title','publish','price',edit,delete]
    # list_display = [check,'nid','title','publish','price',display_authors,edit,delete]  #多对多的时候用函数的模式display_authors
    list_display = [check,'nid','title','publish','price','authors',edit,delete]


site.register(Book,BookConfig)
site.register(Publish)
site.register(Author)
site.register(AuthorDetail)

2. Xadmin/service/Xadmin.py

from django.conf.urls import url
from django.shortcuts import HttpResponse,render,redirect


class ModelXadmin(object):
    list_display=["__str__",]
    print('list_display:',list_display)

    def __init__(self,model,site):
        self.model =model
        self.site =site

    def list_view(self,request):
        print("self.model:",self.model) #用户访问哪张表，self.model就是谁。
        model_name =self.model._meta.model_name
        data_list = self.model.objects.all()
        print("list_display",self.list_display)##['title','price]
        print('datalist',data_list)

        #处理表头
        header_list=[]
        #[check,'nid','title','publish','price',edit,delete]
        for field in self.list_display:# model类的字段
            if isinstance(field,str):
                if field =='__str__':
                    print("field",field)
                    val =self.model._meta.model_name.upper()
                    print('val',val)
                else:
                    field_obj =self.model._meta.get_field(field)
                    print('11111111111',field_obj)
                    val =field_obj.verbose_name
                    print(val)
            else:
                val = field(self,is_header=True) #获取表头，传is_header=True
            header_list.append(val)
        #处理表单数据
        new_data_list=[]
        for obj in data_list:# data_list [book_obj,book_obj2...]         data_list = self.model.objects.all()
            print('obj:',obj) #obj Book object 打印的为对象.
            temp =[]
            for field in self.list_display:  #list-display 为在app01下定义的字段. list_display = [check,'nid','title','publish','price'
                if isinstance(field,str):
                    from django.db.models.fields.related import ManyToManyField  # 44行到 53行代码为manytomany多对多字段作者显示的。

                    field_obj = self.model._meta.get_field(field)

                    if isinstance(field_obj, ManyToManyField):
                        t = []
                        for i in getattr(obj,field).all():
                            t.append(str(i))
                        val = ','.join(t)
                        print('manytomany',val)
                    else:
                        val = getattr(obj,field)  #将属性字符串进行getattr操作 比如：getattr(book_obj,title) 结果为linux ,或者
                else:
                    val =field(self,obj)  #执行app01下 的方法.

                temp.append(val)

            new_data_list.append(temp)

        print('data-list:',data_list)  # data-list: <QuerySet [<Book: linux>, <Book: go>, <Book: python>, <Book: c>]>
        print('8888',new_data_list) #8888 [["<input type ='checkbox'>", 1, 'linux', <Publish: 五道口出版社>, Decimal('111.00'), '', "<a herf ='1/change'>编辑</a>", 'a href =>删除 </a>'], ["<input type ='checkbox'>", 2, 'go', <Publish: 上地出版社>, Decimal('222.00'), '哪吒,苑浩', "<a herf ='2/change'>编辑</a>", 'a href =>删除 </a>'], ["<input type ='checkbox'>", 3, 'python', <Publish: 五道口出版社>, Decimal('333.00'), '苑浩,哪吒', "<a herf ='3/change'>编辑</a>", 'a href =>删除 </a>'], ["<input type ='checkbox'>", 4, 'c', <Publish: 清华出版社>, Decimal('444.00'), '', "<a herf ='4/change'>编辑</a>", 'a href =>删除 </a>']]
        return render(request, 'list_view.html', {"new_data_list": new_data_list,"model_name":model_name,"header_list":header_list})

    def add_view(self,request):
        return render(request,'add_view.html')

    def change_view(self,request,id):
        return render(request,'change_view.html')

    def delete_view(self,request,id):
        return render(request,'delete_view.html')

    def get_urls2(self):
        temp =[]
        temp.append(url(r"^$",self.list_view))
        temp.append(url('r^add/$',self.add_view))
        temp.append(url('r^(d+)/change/$',self.add_view))
        temp.append(url('r^(d+)/delete/$',self.delete_view))

        return temp

    @property
    def urls2(self):
        print('url2')
        return self.get_urls2(),None,None

class  XadminSite(object):
    def __init__(self,name ='admin'):
        self._registry ={}

    def get_urls(self):
        print(self._registry)# {Book:modelAdmin(Book),.....}
        temp = []

        for model, admin_class_obj in self._registry.items():
            #获取当前循环的model的字符串与所在的app字符串
            app_name = model._meta.app_label # 'app01'
            model_name = model._meta.model_name  #'book'

            temp.append(url(r'^{0}/{1}/'.format(app_name,model_name),admin_class_obj.urls2),)

            return temp

    @property
    def urls(self):
        print('urls')
        return self.get_urls(),None,None

    def register(self ,model,admin_class =None,**options):
        if not admin_class:
            admin_class =ModelXadmin

        self._registry[model]= admin_class(model,self) #{ BOOK：ModelAdmin(Book),Publish:ModelAdmin(Publish)}

site =XadminSite()

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原文地址：https://www.cnblogs.com/mengbin0546/p/9150636.html

day85 ModuleForm Form组件

Form组件的功能 ： 1. 校验字段 ，2. 渲染页面 ，3.显示错误信息.

一 、原生form 的表单增删改查.

1 .modules 文件

二、modelform组件功能

2. 创建 增add 和 改 change

三、ModelForm的参数

整理的代码 ：

1. app01/xadmin.py

2. Xadmin/service/Xadmin.py

Form组件的功能： 1. 校验字段，2. 渲染页面，3.显示错误信息.

一、原生form 的表单增删改查.

2. 创建增add 和改 change

整理的代码：