CRM客户关系管理系统（七）

第七章、动态modelform功能实现

 7.1.动态modelform的实现

（1）给第一列添加一个a标签

kingadmintag.py

（2）kingadmin/urls.py

urlpatterns = [
        #修改页面
    url(r'^(\w+)/(\w+)/(\d+)/change/$', views.table_obj_change,name='table_obj_change'),
]

（3）kingamdin/views.py

@login_required
def table_obj_change(request,app_name,model_name,obj_id):
    '''kingadmin 数据修改页'''

    return render(request,'kingadmin/table_obj_change.html')

（4）table_obj_change.html

{#kingadmin/templates/kingadmin/table_obj_change.html#}

{% extends 'kingadmin/index.html' %}
{% load kingadmin_tags %}

{% block right-content-container %}
<h2 class="page-header">app</h2>

<div>
change
</div>

{% endblock %}

（5）动态modelform生成

生成类的两种方式，第二种相当于动态生成的

举例：

新建kingadmin/form_handle.py

# kingadmin/formhandle.py

from django.forms import ModelForm

def create_dynamic_model_form(admin_class):
    '''动态生成modelform'''

    class Meta:
        model = admin_class.model
        fields = "__all__"

    #动态生成ModelForm
    dynamic_form = type("DynamicModelForm",(ModelForm,),{'Meta':Meta})

    return dynamic_form

kingadmin/views.py

@login_required
def table_obj_change(request,app_name,model_name,obj_id):
    '''kingadmin 数据修改页'''

    admin_class = site.enable_admins[app_name][model_name]
    model_form = form_handle.create_dynamic_model_form(admin_class)
    # 实例化
    form_obj = model_form()
    return render(request,'kingadmin/table_obj_change.html',locals())

table_obj_change.html

现在动态ModelForm的功能就实现了

7.2.动态ModelForm增加自定义样式

Bootstarp表单样式

静态ModelForm增加自定样式的写法

crm/form.py

# crm/form.py

from django.forms import ModelForm
from crm import models

class CustomerForm(ModelForm):
    class Meta:
        model = models.CustomerInfo
        fields = "__all__"

    #django是通过“__new__”方法，找到ModelForm里面的每个字段的，然后循环出每个字段添加自定义样式
    def __new__(cls, *args, **kwargs):
        #cls.base_fields是一个元祖，里面是 所有的  【(字段名，字段的对象),(),()】
        for field_name in cls.base_fields:
            filed_obj = cls.base_fields[field_name]
            #添加属性
            filed_obj.widget.attrs.update({'class':'form-control'})

        return ModelForm.__new__(cls)

 动态ModelForm增加自定义样式

（1）kingadmin/form_handle.py

# kingadmin/formhandle.py

from django.forms import ModelForm

def create_dynamic_model_form(admin_class):
    '''动态生成modelform'''

    class Meta:
        model = admin_class.model
        fields = "__all__"

    # django是通过“__new__”方法，找到ModelForm里面的每个字段的，然后循环出每个字段添加自定义样式
    def __new__(cls, *args, **kwargs):
        # cls.base_fields是一个元祖，里面是 所有的  【(字段名，字段的对象),(),()】
        for field_name in cls.base_fields:
            #每个字段的对象
            filed_obj = cls.base_fields[field_name]
            # 添加属性
            filed_obj.widget.attrs.update({'class': 'form-control'})

        return ModelForm.__new__(cls)

    #动态生成ModelForm
    dynamic_form = type("DynamicModelForm",(ModelForm,),{'Meta':Meta,'__new__':__new__})

    return dynamic_form

可以打印cls.base_fields看下

OrderedDict([('name', <django.forms.fields.CharField object at 0x0000000004761D68>), ('url_type', <django.forms.fields.TypedChoiceField object at 0x0000000004772128>), ('url_name', <django.forms.fields.CharField object at 0x0000000004772240>)])

（2）table_obj_list.html

{#kingadmin/templates/kingadmin/table_obj_change.html#}

{% extends 'kingadmin/index.html' %}
{% load kingadmin_tags %}

{% block right-content-container %}
    <h2 class="page-header">app</h2>

<form class="form-horizontal">
    {% for field in form_obj %}
    <div class="form-group">
        <label class="col-sm-2 control-label">{{ field.label }}</label>
        <div class="col-sm-10">
            {{ field }}
        </div>
    </div>
    {% endfor %}
</form>
{% endblock %}

效果：

7.3.实现任意表的增加和修改功能

现在的表单是添加的表单，如何变成是修改的表单呢？

（1）views.py

（2）table_obj_change.html

显示表名和修改的字段名

添加一个按钮

效果：

 修改功能实现

kingadmin/views.py

def table_obj_change(request,app_name,model_name,obj_id):
    '''kingadmin 数据修改页'''

    admin_class = site.enable_admins[app_name][model_name]
    model_form = form_handle.create_dynamic_model_form(admin_class)
    #让表单变成是修改的表单
    obj = admin_class.model.objects.get(id=obj_id)

    #修改
    if request.method == 'GET':
        form_obj = model_form(instance=obj)

    elif request.method == 'POST':
        form_obj = model_form(instance=obj,data=request.POST)
        if form_obj.is_valid():
            form_obj.save()
            #修改后跳转到的页面
            return redirect("/kingadmin/%s/%s/"%(app_name,model_name))

    return render(request,'kingadmin/table_obj_change.html',locals())

table_obj_list.html添加错误提示

添加功能实现

（1）kingadmin/url.py

#增加
    url(r'^(\w+)/(\w+)/add/$', views.table_obj_add,name='table_obj_add'),

（2）kingadmin/views.py

@login_required
def table_obj_add(request,app_name,model_name):
    '''kingadmin 数据添加'''

    admin_class = site.enable_admins[app_name][model_name]
    model_form = form_handle.create_dynamic_model_form(admin_class)

    if request.method == 'GET':
        form_obj = model_form()
    elif request.method == 'POST':
        form_obj = model_form(data=request.POST)
        if form_obj.is_valid():
            form_obj.save()
            #跳转到的页面
            return redirect("/kingadmin/%s/%s/"%(app_name,model_name))
    return render(request, 'kingadmin/table_obj_add.html', locals())

（3）前端页面

因为添加和修改的表单是一样的，所以单独新建table_obj_change_component.html（放form表单），然后chang和add 的html直接include

table_obj_change_component.html

{#kingadmin/templates/kingadmin/table_obj_change_component.html#}

<form class="form-horizontal" method="post">
    {% csrf_token %}
    {{ form_obj.errors }}
    {% for field in form_obj %}
    <div class="form-group">
        <label class="col-sm-2 control-label">{{ field.label }}</label>
        <div class="col-sm-10">
            {{ field }}
            <span style="color: red;">{{ field.errors.0 }}</span>
        </div>
    </div>
    {% endfor %}

    <div class="form-group">
        <div class="col-sm-offset-11 col-sm-10">
          <button type="submit" class="btn btn-info">Save</button>
        </div>
    </div>
</form>

table_obj_change.html

{#kingadmin/templates/kingadmin/table_obj_change.html#}

{% extends 'kingadmin/index.html' %}
{% load kingadmin_tags %}

{% block right-content-container %}
    <h2 class="page-header">{% get_model_name admin_class %}</h2>
    <h4 class="page-header">修改{{ form_obj.instance }}</h4>

<div>
change

{% include 'kingadmin/table_obj_change_component.html' %}
</div>

{% endblock %}

table_obj_add.html

{#kingadmin/templates/kingadmin/table_obj_add.html#}

{% extends 'kingadmin/index.html' %}
{% load kingadmin_tags %}

{% block right-content-container %}
    <h2 class="page-header">{% get_model_name admin_class %}</h2>
    <h4 class="page-header">添加{% get_model_name admin_class %}</h4>

<div>
add

{% include 'kingadmin/table_obj_change_component.html' %}
</div>
{% endblock %}

（4）新增加的数据应该显示在最前面