CRM多条件查询——第20天

1、前端代码如下：

<div class="row">
          <div class="col-lg-2">
                 <input type="search" name="_q" class="form-control" value="{{search_value}}" placeholder="search by {%for column in admin_class.search_fields %} {{column}} {% endfor %}" style="margin-left:15px">
          </div>
          <div class="col-lg-2">
                 <button type="SUBMIT" class="btn btn-success">search</button>
          </div>
</div>

前端搜索框里面的值当点击下一页时，里面的值会消失，在view.py文件中返回请求的数据值到前端value中，value="{{search_value}}"

def display_table_objs(request,app_name,table_name):

    print("-->",app_name,table_name)
    #models_module = importlib.import_module('%s.models'%(app_name))
    #model_obj = getattr(models_module,table_name)
    admin_class = kind_admin.enabled_admins[app_name][table_name]
    #admin_class = king_admin.enabled_admins[crm][userprofile]

    #object_list = admin_class.model.objects.all()
    object_list,filter_condtions = table_filter(request,admin_class)

    #多条件搜索功能

    object_list = table_search(request,admin_class,object_list)
    #排序过后的数据
    object_list,order_key = table_order(request,object_list)

    paginator = Paginator(object_list, admin_class.list_per_page) # Show 25 contacts per page
    print("paginator------",paginator)
    page = request.GET.get('page')
    try:
        query_sets = paginator.page(page)
    except PageNotAnInteger:
        # If page is not an integer, deliver first page.
        query_sets = paginator.page(1) ##这个是对你的分页的数据进行取值
    except EmptyPage:
        # If page is out of range (e.g. 9999), deliver last page of results.
        query_sets = paginator.page(paginator.num_pages)
    print("query_sets------------",query_sets)
    return render(request,"kindadmin/table_objs.html",{"admin_class":admin_class,
                                                        "query_sets":query_sets,
                                                        "filter_condtions":filter_condtions,
                                                       "order_key":order_key,
                                                       "previous_orderkey":request.GET.get("o",""),
                                                       "search_value":request.GET.get("_q","")})

当我点击下一页时，统计的数据不对，得把搜索的值也拼接加到分页的链接里面，上下页也是一样

前端加placeholder 告诉用户可以使用那几个字段搜索查询，值应该从admin_class里的search_fields循环取出

2、搜索查询也是在过滤后查询的，在view.py里增加：

object_list,filter_condtions = table_filter(request,admin_class)

    #多条件搜索功能

    object_list = table_search(request,admin_class,object_list)
    #排序过后的数据
    object_list,order_key = table_order(request,object_list)

table_order函数是在utils.py文件中：

获取请求过来的_q值，然后利用Q()去或查询，起初我没有判断search_value，导致我重新进入页面说None是不能够查询的：

#Q用法
from django.db.models import Q

>>> from PerfectCRM.Perfectcrm.crm import models
>>> from django.db.models import Q
>>> models.Customer.objects.values('qq','name')
<QuerySet [{'qq': '5676567@qq.com', 'name': '江大可'}, {'qq': '25064568@qq.com', 'name': '江可可'}, {'qq': '78787
4859@qq.com', 'name': '杨光'}, {'qq': '216564732@qqcom', 'name': '王大大'}, {'qq': '2787748877@qq.com', 'name': '
刘新'}]>
>>> con = Q()
>>> con.connector="OR"
>>> con.children.append(('qq__contains','5676567'))
>>> con.children.append(('name__contains','江大')) #name包函的内容
>>> con
<Q: (OR: ('qq__contains', '5676567'), ('name__contains', '江大'))>
>>> models.Customer.objects.values('qq','name').filter(con)
<QuerySet [{'qq': '5676567@qq.com', 'name': '江大可'}]>
>>>

def table_search(request,admin_class,objs):
    """
    多条件搜索功能
    :param request: 请求的
    :param admin_class: Customer
    :param objs: 筛选过后的对象
    :return:
    """
    search_value = request.GET.get("_q","")
    if search_value:
        con = Q()
        con.connector="OR"
        for column in admin_class.search_fields:
            con.children.append(('%s__contains'%column,search_value))

        ele = objs.filter(con)
    else:
        ele =objs

    return ele

 提交的时候_q也会做为一个过滤条件，所以也会导致报错，解决是：

def table_filter(request,admin_class):
    """进行条件过滤并返回过滤后的数据"""

    filter_conditions = {}
    for k,v in request.GET.items():
        kitem =['page','o','_q']
        if k in kitem:
            continue
        if v:
            filter_conditions[k]=v
    print("filter_conditions:",filter_conditions)
    print("admin_class.model.objects.filter(**filter_conditions)",admin_class.model.objects.filter(**filter_conditions))
    return admin_class.model.objects.filter(**filter_conditions),filter_conditions