django_day11_项目相关

新增和编辑

路由

url(r'^category_add/$', views.category_change, name='category_add'),
url(r'^category_edit/(\d+)$', views.category_change, name='category_edit'),

视图

def category_change(request, pk=None):
    obj = models.Category.objects.filter(pk=pk).first()  # pk=None   obj=>None
    form_obj = CategoryForm(instance=obj)
    if request.method == 'POST':
        form_obj = CategoryForm(request.POST, instance=obj)
        if form_obj.is_valid():
            form_obj.save()
            return redirect('category_list')

    title = '编辑分类' if pk else '新增分类'

    return render(request, 'form.html', {'form_obj': form_obj, 'title': title})

模板

{% extends 'dashboard.html' %}


{% block main %}
    
{{ title }}

    

        {% csrf_token %}

        {% for field in form_obj %}
            


                {{ field.label }}
                

                    {{ field }}
                     {{ field.errors.0 }} 
                
            
        {% endfor %}

        

            

                保存
            
        
    

{% endblock %}

q = Q()
# Q(Q(title__contains=query)|Q(detail__content__contains=query))
q.connector = 'OR'
q.children.append(Q(title__contains=query))
q.children.append(Q(detail__content__contains=query))


Q(title__contains=query)  #   Q(('title__contains',query))
 


def get_query(request, field_list):
    # 传入一个列表['title','detail__content'] ,返回一Q对象
    query = request.GET.get('query', '')

    q = Q()
    # Q(Q(title__contains=query)|Q(detail__content__contains=query))
    q.connector = 'OR'
    for field in field_list:

        q.children.append(Q(('{}__contains'.format(field),query)))
    # q.children.append(Q(detail__content__contains=query))

    return q

解决分页保留查询参数的方法

from django.http.request import QueryDict

request.GET._mutable = True
request.GET['page'] = 1

request.GET.copy()  # 返回一个可编辑的深拷贝

request.GET.urledncode()  # page=1&aa=111