# 搜索|在已經過濾的條件之下做搜索;
# 在查詢語句中,用"包含"來做模糊搜索:
#     model_class.objects.filter(contact__contains=‘33‘)
# 涉及到Q的操作;這裏通過Q這個類來實現;
    # 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():
                # 分頁,排序,搜索的參數對過濾沒有影響;
                if key in (‘page‘,‘_o‘,‘_q‘):continue
                ...
# 搜索完之後再排序;
    # views.py
        @login_required
        
 
def table_obj_list(request,app_name,model_name):
            ...
            # 4.返回搜索結果
            #   admin_class獲知所有可以搜索的條件;
            #   request參數獲知當前搜索條件,改變搜索結果querysets;
            querysets = get_searched_result(request,querysets,admin_class)
            # 2.排序後端數據查詢
            ...
            
 
# 3.分頁
            ...
            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
        # 獲取搜索結果
        def get_searched_result(request,querysets,admin_class):
            search_key = request.GET.get(‘_q‘)
            if search_key:
                # 1.實例化Q
                q = Q()
                # 2.確定邏輯符號
                q.connector = ‘OR‘
                for search_field in admin_class.search_fields:
                    # 3.添加條件
                    #   append()傳入一個元組,字符串格式化跟著元組表示傳入多個參數,沒有元組表示生成多個字符串;
                    q.children.append(("%s__contains"%search_field,search_key))
                # 4.q查詢
                return querysets.filter(q)
            return querysets

# 在過濾條件下搜索
    # 添加隱藏的搜索框將過濾條件在搜索的表單中一並提交;
    # table_obj_list.html
        <form>
            <input type="search" name="_q">
            <!-- 將當前過濾條件通過表單提交 -->
            {% 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顯示正在搜索的條件
    # 在搜索查詢之後,獲取url中的參數值,傳遞到前端隱藏標簽的value中;
    # views.py
        @login_required
        def table_obj_list(request,app_name,model_name):
            ...
            # 4.返回搜索結果
            #   admin_class獲知所有可以搜索的條件;
            #   request參數獲知當前搜索條件,改變搜索結果querysets;
            querysets = get_searched_result(request,querysets,admin_class)
            # 4.1 顯示正在搜索的條件
            admin_class.search_key = request.GET.get(‘_q‘,‘‘)        
            ...
    # table_obj_list.html
        <input type="search" name="_q" value="{{ admin_class.search_key }}">

CRM手記-8 | Django