CRM手记-8 | Django

Posted 2020-10-21 胡说八道

# 搜索|在已经过滤的条件之下做搜索;
# 在查询语句中,用"包含"来做模糊搜索:
#     model_class.objects.filter(contact__contains=‘33‘)
# 涉及到Q的操作;这里通过Q这个类来实现;
    # table_obj_list.html
        <form>
            <input type="search" name="_q">
            <input type="submit" value="搜索">
        </form>
    # views.py
        def get_filter_result(request,querysets):
            filter_conditions = {}
            for key,val in request.GET.items():
                # 分页,排序,搜索的参数对过滤没有影响;
                if key in (‘page‘,‘_o‘,‘_q‘):continue
                ...
# 搜索完之后再排序;
    # views.py
        @login_required
        def table_obj_list(request,app_name,model_name):
            ...
            # 4.返回搜索结果
            #   admin_class获知所有可以搜索的条件;
            #   request参数获知当前搜索条件,改变搜索结果querysets;
            querysets = get_searched_result(request,querysets,admin_class)
            # 2.排序后端数据查询
            ...
            # 3.分页
            ...
            return render(request,‘kingadmin/table_obj_list.html‘, {
                ‘querysets‘:querysets,
                ‘admin_class‘:admin_class,
                ‘current_page‘:current_page,
                ‘current_order_field‘:current_order_field
            })

        from django.db.models import Q
        # 获取搜索结果
        def get_searched_result(request,querysets,admin_class):
            search_key = request.GET.get(‘_q‘)
            if search_key:
                # 1.实例化Q
                q = Q()
                # 2.确定逻辑符号
                q.connector = ‘OR‘
                for search_field in admin_class.search_fields:
                    # 3.添加条件
                    #   append()传入一个元组,字符串格式化跟着元组表示传入多个参数,没有元组表示生成多个字符串;
                    q.children.append(("%s__contains"%search_field,search_key))
                # 4.q查询
                return querysets.filter(q)
            return querysets

# 在过滤条件下搜索
    # 添加隐藏的搜索框将过滤条件在搜索的表单中一并提交;
    # table_obj_list.html
        <form>
            <input type="search" name="_q">
            <!-- 将当前过滤条件通过表单提交 -->
            {% for k,v in admin_class.filter_condtions.items %}
                <input type="hidden" name={{ k }} value={{ v }}>
            {% endfor %}
            <input type="submit" value="搜索">
        </form>

# 添加value显示正在搜索的条件
    # 在搜索查询之后,获取url中的参数值,传递到前端隐藏标签的value中;
    # views.py
        @login_required
        def table_obj_list(request,app_name,model_name):
            ...
            # 4.返回搜索结果
            #   admin_class获知所有可以搜索的条件;
            #   request参数获知当前搜索条件,改变搜索结果querysets;
            querysets = get_searched_result(request,querysets,admin_class)
            # 4.1 显示正在搜索的条件
            admin_class.search_key = request.GET.get(‘_q‘,‘‘)        
            ...
    # table_obj_list.html
        <input type="search" name="_q" value="{{ admin_class.search_key }}">