CRM客户关系管理系统（四）

kingadmin设计开发

4.4.根据list_display配置生成数据列表

（1）kingadmin/views.py

（2）kingadmin/templates/kingadmin/table_obj_list.html

通过自定义的admin_class类，循环出list_display所有的列

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

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

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

<div>
        {{ querysets }}
        <table class="table table-striped">
            <thead>
                <tr>
                    {% for column in admin_class.list_display %}
                        <th>{{ column }}</th>
                    {% endfor %}

                </tr>
            </thead>
            <tbody>

            </tbody>
        </table>
</div>

{% endblock %}

（3）自定义模板标签

kingadmin下创建python package "templatetags",再新建kingadmin_tags.py

# kingadmin/templatetags/kingadmin_tags.py

from django.template import Library
from django.utils.safestring import mark_safe

register = Library()

@register.simple_tag
def build_table_row(obj,admin_class):
    '''生成一条记录的html element'''

    ele = ''
    for column_name in admin_class.list_display:
        #通过反射获取列的数据，两个参数，一个是object，一个是列名
        column_data = getattr(obj,column_name)
        td_ele = "<td>%s</td>"%column_data
        ele += td_ele

    return mark_safe(ele)

（4）table_obj_list.html

首先要导入：{% load kingadmin_tags%}

然后使用自定义模板标签：<tr>{% build_table_row obj admin_class %}</tr>

使用的时候需要传两个参数进去

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

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

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

<div>
        {{ querysets }}
        <table class="table table-striped">
            <thead>
                <tr>
                    {% for column in admin_class.list_display %}
                        <th>{{ column }}</th>
                    {% endfor %}

                </tr>
            </thead>
            <tbody>
                {% for obj in querysets %}
                    <tr>{% build_table_row obj admin_class %}</tr>
                {% endfor %}

            </tbody>
        </table>
</div>

{% endblock %}

现在访问就可以看到对应列的数据了，但是status显示的是“0”，“1”，我们想要的是“未报名”，“已报名”，还有source,contact_tapy

（5）修改kingadmin_tags.py

因为有的字段有choices，有的字段没有choices,需要添加一个判断

models.CustomerInfo._meta.fields   获取model所有字段的对象

models.CustomerInfo._meta.get_field('status')   取一个字段的对象

get_xxxx_display       显示choices里面的值

# kingadmin/templatetags/kingadmin_tags.py

from django.template import Library
from django.utils.safestring import mark_safe

register = Library()

@register.simple_tag
def build_table_row(obj,admin_class):
    '''生成一条记录的html element'''

    ele = ''
    for column_name in admin_class.list_display:
        #获取所有字段对象
        column_obj = admin_class.model._meta.get_field(column_name)
        #字段对象的choices方法，如果有choices，则get_xxx_display
        if column_obj.choices:
            column_data = getattr(obj,'get_%s_display'%column_name)()
        else:
            column_data = getattr(obj,column_name)

        td_ele = "<td>%s</td>"%column_data
        ele += td_ele

    return mark_safe(ele)

现在访问页面

4.5.添加过滤功能

（1）kingadmin/views.py

# kingadmin/templatetags/kingadmin_tags.py
import datetime

from django.template import Library
from django.utils.safestring import mark_safe

register = Library()

@register.simple_tag
def build_filter_ele(filter_column,admin_class):
    filter_ele = "<select name='%s'>"%filter_column
    column_obj = admin_class.model._meta.get_field(filter_column)
    try:
        for choice in column_obj.get_choices():
            option = "<option value='%s'>%s</option>"%choice
            filter_ele += option

    except AttributeError as e:
        #get_internal_type():获取字段属性
        #因为时间的过滤方式是固定的（今天，过去七天，一个月.....），而不是从后台获取的
        if column_obj.get_internal_type() in ('DateField','DateTimeField'):
            time_obj = datetime.datetime.now()
            time_list = [
                ['','--------'],
                [time_obj,'Today'],
                [time_obj - datetime.timedelta(7),'七天内'],
                [time_obj.replace(day=1),'本月'],
                [time_obj - datetime.timedelta(90),'三个月内'],
                [time_obj.replace(month=1,day=1),'YearToDay(YTD)'],     #本年
                ['','ALL'],
            ]

            for i in time_list:
                option = "<option value='%s'>%s</option>" %(i[0],i[1])
                filter_ele += option

    filter_ele += "</select>"

    return mark_safe(filter_ele)

（2）table_obj_list.html

 <div>
            <form>
                {% for filter_column in admin_class.list_filter %}
                    {% build_filter_ele filter_column admin_class %}
                {% endfor %}
                <input type="submit" value="过滤">
            </form>
        </div>

访问页面

接下来把数据返回到前端

（3）kingadmin/views.py

def get_filter_result(request,querysets):
    filter_conditions = {}
    #获取过滤的字段
    for key,val in request.GET.items():
        if val:
            filter_conditions[key] = val
    #返回过滤后的数据
    return querysets.filter(**filter_conditions),filter_conditions

@login_required
def table_obj_list(request, app_name, model_name):
    '''取出指定model里的数据返回给前端'''
    #拿到admin_class后，通过它找到拿到model
    admin_class = site.enable_admins[app_name][model_name]
    querysets = admin_class.model.objects.all()
    querysets,filter_conditions = get_filter_result(request,querysets)
    admin_class.filter_conditions = filter_conditions
    return render(request, 'kingadmin/table_obj_list.html',{'querysets':querysets,'admin_class':admin_class})

（4）kingadmin_tags.py

当选择过滤条件后，给对应值添加选中状态  selected=selected

现在通过时间过滤会报格式不正确的错误

修改时间过滤的格式

现在不报错了，但并没有过滤出数据

因为其它条件过滤的时候值是等于，但是根据时间过滤应该是大于等于才对

修改kingadmin_tags.py