• 1、效果图
  • 2、详细步骤解析
  • 3、总结、代码
 

1、效果图

增

删除

改

2、详细步骤解析

1、构造增删改查url，反向解析

2、ModelForm定制add、edit页面

3、starak中的ModelForm

 

3、总结、代码

1、知识点

1.解决代码重用
    {% include 'form.html' %}

2.自定制配置modelform
    每张表，就可自定义配置 labels , widges...
 class BookModelForm(ModelForm):

    class Meta:

        model = Book

        fields = "__all__"

        labels = {

            "title": '书籍名称',

            "price": '价格',

        }

    ...

    modelform_class = BookModelForm
3、stark中的Modelform配置
modelform_class = []

# ModelForm组件渲染  list、增、删、改页面

def get_modelform_class(self):

    """ModelForm组件"""

    if not self.modelform_class:

        from django.forms import ModelForm

        class ModelFormDemo(ModelForm):

            class Meta:

                model = self.model

                fields = "__all__"

        return ModelFormDemo

    else:

        return self.modelform_class
配置样式，由于不确定字段，得在前端玩！
4.change_view()
 注意 instance,否则为添加

    form = ModelFormDemo(request.POST, instance=edit_obj)

    if form.is_valid():

        form.save()

2、模板层代码

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    {% block title %}

        <title>Title</title>

    {% endblock %}

    <link rel="stylesheet" href="/static/bootstrap-3.3.7/css/bootstrap.css">

    <script src="/static/jQuery/jquery-3.2.1.min.js"></script>

    {% block css %}

    {% endblock %}

</head>

<body>

<div class="container">

    <div class="row">

        {% block header %}

        {% endblock %}

        <div class="col-md-9 col-md-offset-1">

            {% block content %}

            {% endblock %}

        </div>

    </div>

</div>

{% block javascript %}

{% endblock %}

</body>

</html>

base.html

{% extends 'base.html' %}

{% block title %}

    <title>add页面</title>

{% endblock %}

{% block css %}

   <style type="text/css">

        input,select {

            display: block;

            width: 100%;

            height: 34px;

            padding: 6px 12px;

            font-size: 14px;

            line-height: 1.42857143;

            color: #555;

            background-color: #fff;

            background-image: none;

            border: 1px solid #ccc;

            border-radius: 4px;

            -webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, .075);

            box-shadow: inset 0 1px 1px rgba(0, 0, 0, .075);

            -webkit-transition: border-color ease-in-out .15s, -webkit-box-shadow ease-in-out .15s;

            -o-transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;

            transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;

        }

        .error{

            color: red;

        }

    </style>

{% endblock %}

{% block header %}

    <h3>add页面</h3>

{% endblock %}

{% block content %}

  {% include 'form.html' %}

{% endblock %}

add_view.html

{% extends 'add_view.html' %}

{% block title %}

    <title>edit页面</title>

{% endblock %}

{% block header %}

    <h3>edit页面</h3>

{% endblock %}

change_view.html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>删除页面</title>

    <link rel="stylesheet" href="/static/bootstrap-3.3.7/css/bootstrap.css">

    <script src="/static/jQuery/jquery-3.2.1.min.js"></script>

</head>

<body>

<div class="container">

    <form action="" method="post" class="text-center">

        {% csrf_token %}

        <p class="text-info">你确认要删除这条记录?</p>

        <button class="btn btn-danger">确认</button>

        <a href="{{ url }}" class="btn btn-primary">取消</a>

    </form>

</div>

</body>

</html>

delete_view.html

<form action="" method="post" novalidate>

    {% for field in form %}

        {% csrf_token %}

        <div class="form-group">

            <label for="">{{ field.label }}</label>

            {{ field }}

            <span class="error pull-right">{{ field.errors.0 }}</span>

        </div>

    {% endfor %}

    <br>

    <button class="btn btn-success pull-right">提交</button>

</form>

form.html

{% extends 'base.html' %}

{% block title %}

    <title>list页面</title>

{% endblock %}

{% block header %}

    <h3>list页面</h3>

{% endblock %}

{% block content %}

    <a class="btn btn-primary" href="{{ add_url }}">添加数据</a>

    <table class="table table-bordered table-striped">

        <tr>

            {% for header in header_list %}

                <th>{{ header }}</th>

            {% endfor %}

        </tr>

        {% for data in new_data_list %}

            <tr>

                {% for item in data %}

                    <td>{{ item }}</td>

                {% endfor %}

            </tr>

        {% endfor %}

    </table>

{% endblock %}

{% block javascript %}

    <script type="text/javascript">

        $('#choice').click(function () {

            if ($(this).prop('checked')) {   //对象自身属性中是否具有指定的属性

                $('.choice_item').prop("checked", true)

            } else {

                $('.choice_item').prop("checked", false)

            }

        })

    </script>

{% endblock %}

list_view.html

3、stark/service/stark.py

from django.conf.urls import url

from django.shortcuts import HttpResponse,render,redirect

from django.utils.safestring import mark_safe

from django.urls import reverse

class ModelStark(object):

    list_display = ["__str__"]  # 子类中没有，直接用父类自己的

    list_display_links = []

    modelform_class = []

    def __init__(self,model, site):

        self.model = model

        self.site = site

    # 增删改查url

    def get_add_url(self):

        model_name = self.model._meta.model_name

        app_label = self.model._meta.app_label

        _url = reverse("%s_%s_add" %(app_label,model_name))

        return _url

    def get_list_url(self):

        model_name = self.model._meta.model_name

        app_label = self.model._meta.app_label

        _url = reverse("%s_%s_list" %(app_label,model_name))

        return _url

    # 复选框，编辑，删除

    def checkbox(self,obj=None, header=False):

        if header:

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

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

    def edit(self,obj=None, header=False):

        if header:

            return "操作"

        # 方案1：固定url

        # return mark_safe("<a href=/stark/app01/userinfo/%s/change>编辑</a>")

        # 方案2：拼接url

        # return mark_safe("<a href='%s/change'>编辑</a>")

        # 方案3：反向解析

        model_name = self.model._meta.model_name

        app_label = self.model._meta.app_label

        _url = reverse("%s_%s_change"%(app_label,model_name),args=(obj.pk,))

        # print("_url",_url)

        return mark_safe("<a href='%s'>编辑</a>"%_url)

    def deletes(self,obj=None, header=False):

        if header:

            return "操作"

        model_name = self.model._meta.model_name

        app_label = self.model._meta.app_label

        _url = reverse("%s_%s_delete"%(app_label,model_name),args=(obj.pk,))

        return mark_safe("<a href='%s'>删除</a>"%_url)

    # ModelForm组件渲染  list、增、删、改页面

    def get_modelform_class(self):

        """ModelForm组件"""

        if not self.modelform_class:

            from django.forms import ModelForm

            class ModelFormDemo(ModelForm):

                class Meta:

                    model = self.model

                    fields = "__all__"

            return ModelFormDemo

        else:

            return self.modelform_class

    def new_list_play(self):

        """构建 ['checkbox','pk', 'name', 'age', edit,'delete']"""

        temp = []

        temp.append(ModelStark.checkbox)

        temp.extend(self.list_display)

        if not self.list_display_links:

            temp.append(ModelStark.edit)

        temp.append(ModelStark.deletes)

        return temp

    def list_view(self, request):

        print(self.model)  # <class 'app01.models.Book'>  用户访问的模型表

        # 构建表头

        header_list = []  # # header_list = ['选择'，'pk',...'操作','操作']

        for field in self.new_list_play():

            if callable(field):

                # header_list.append(field.__name__)

                val = field(self,header=True)

                header_list.append(val)

            else:

                if field == "__str__":

                    header_list.append(self.model._meta.model_name.upper())

                else:

                    val = self.model._meta.get_field(field).verbose_name    # 中文名称

                    header_list.append(val)

        # 构建表单

        data_list = self.model.objects.all()        # [obj1,obj2,...]

        new_data_list = []

        for obj in data_list:                   # Book表模型，Author表模型

            temp = []

            for field in self.new_list_play():     # ['name','age']

                if callable(field):                 # edit()  可调用的

                    val = field(self,obj)           # 直接调用edit()函数

                    print('val--------->',val)

                else:

                    val = getattr(obj,field)       # 反射  obj是实例对象，name是方法

                    # list_display_links 按钮

                    if field in self.list_display_links:

                        model_name = self.model._meta.model_name

                        app_label = self.model._meta.app_label

                        _url = reverse("%s_%s_change" % (app_label, model_name), args=(obj.pk,))

                        # print(_url)

                        val = mark_safe("<a href='%s'>%s</a>"%(_url,field))

                temp.append(val)

            new_data_list.append(temp)

        print('new_data_list',new_data_list)        # 构造数据  [['jack', 44], ['mark', 33]]

        # 构建一个addurl

        add_url = self.get_add_url()

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

    def add_view(self, request):

        ModelFormDemo=self.get_modelform_class()

        form = ModelFormDemo()

        if request.method == "POST":

            form = ModelFormDemo(request.POST)

            if form.is_valid():

                form.save()

                return redirect(self.get_list_url())

        return render(request, "add_view.html",locals())

    def delete_view(self, request, id):

        url = self.get_list_url()

        if request.method == "POST":

            self.model.objects.filter(pk=id).delete()

            return redirect(url)

        return render(request, "delete_view.html", locals())

    def change_view(self, request, id):

        edit_obj = self.model.objects.filter(pk=id).first()

        ModelFormDemo=self.get_modelform_class()

        form = ModelFormDemo(instance=edit_obj)

        if request.method == "POST":

            form = ModelFormDemo(request.POST,instance=edit_obj)

            if form.is_valid():

                form.save()

                return redirect(self.get_list_url())

        return render(request, "change_view.html",locals())

    def get_urls2(self):

        """构造 add/delete/change"""

        model_name = self.model._meta.model_name

        app_label = self.model._meta.app_label

        temp = []

        temp.append(url(r'^$', self.list_view, name='%s_%s_list'%(app_label,model_name)))

        temp.append(url(r'^add/', self.add_view, name='%s_%s_add'%(app_label,model_name)))

        temp.append(url(r'^(\d+)/delete/', self.delete_view, name='%s_%s_delete'%(app_label,model_name)))

        temp.append(url(r'^(\d+)/change/', self.change_view, name='%s_%s_change'%(app_label,model_name)))

        return temp

    @property

    def urls2(self):

        return self.get_urls2(), None, None

class StarkSite(object):

    """site单例类"""

    def __init__(self):

        self._registry = {}

    def register(self,model, stark_class=None):

        """注册"""

        if not stark_class:

            stark_class = ModelStark

        self._registry[model] = stark_class(model,self)

    def get_urls(self):

        """构造一层urls app01/book"""

        temp = []

        for model, stark_class_obj in self._registry.items():

            print(model, 'stark_clas_obj', stark_class_obj)  # 不同的model模型表

            """

             <class 'app01.models.UserInfo'> ----> <app01.starkadmin.UserConfig object at 0x00000072DDB65198>

             <class 'app01.models.Book'> ----> <stark.service.stark.ModelStark object at 0x00000072DDB65240>

             """

            app_label = model._meta.app_label     # app01

            model_name = model._meta.model_name   # book

            # temp.append(url(r'^%s/%s'%(app_label, model_name),([],None,None)))

            temp.append(url(r'^%s/%s/'%(app_label, model_name),stark_class_obj.urls2))

            """

               path('app01/userinfo/',UserConfig(Userinfo,site).urls2),

               path('app01/book/',ModelStark(Book,site).urls2),

            """

        return temp

    @property

    def urls(self):

        # return [],None,None

        return self.get_urls(),None,None

site = StarkSite()   # 单例对象

4、app01下的stark.py

 
from stark.service import stark

from .models import *

from django.forms import ModelForm

class BookModelForm(ModelForm):

    class Meta:

        model = Book

        fields = "__all__"

        labels = {

            "authors":"作者",

            "publishDate":"出版日期",

        }

class BookConfig(stark.ModelStark):

    list_display = ['nid', 'title', 'price']

    modelform_class = BookModelForm

class AuthorConfig(stark.ModelStark):

    list_display = ['nid', 'name', 'age']

    list_display_links = ['name','age']

stark.site.register(Book,BookConfig)

stark.site.register(Publish)

stark.site.register(Author,AuthorConfig)

stark.site.register(AuthorDetail)

print(stark.site._registry)

"""

{<class 'app01.models.Book'>: <stark.service.stark.ModelStark object at 0x0000003AA7439630>,

<class 'app01.models.Publish'>: <stark.service.stark.ModelStark object at 0x0000003AA7439668>,

<class 'app01.models.Author'>: <stark.service.stark.ModelStark object at 0x0000003AA74396A0>,

<class 'app01.models.AuthorDetail'>: <stark.service.stark.ModelStark object at 0x0000003AA7439940>}

"""
 

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