[英]How to implement search function in django?
我的数据库中有很多书。 搜索数据库不返回任何内容(空查询集)。
在菜单中:
<form name="myform" method="POST" action="{% url 'search' %}">
{% csrf_token %}
<input type="text" name="search" placeholder="Search" />
</form>
视图.py,
def search(request):
if request.method == 'POST':
book_name = request.POST.getlist('search')
try:
status = Add_prod.objects.filter(bookname__icontains=book_name)
#Add_prod class contains a column called 'bookname'
except Add_prod.DoesNotExist:
status = None
return render(request,"search.html",{"books":status})
else:
return render(request,"search.html",{})
我的模板文件,
{% if books %}
<a href="{% url 'buy_book' pk=books.pk %}">
<!--Upon successful search book image with hyperlink appears -->
<img src="{{books.image.url}}" alt="No Image"></a>
<p>{{books.bookname}}</p>
<p>Rs.{{books.price}}</p>
{% endif %}
有几件事我想在这里添加..
1)我认为搜索结果应该是方法GET而不是POST。 您可以参考此链接以查看何时使用 POST 以及何时使用 GET
<form name="myform" method="GET" action="{% url 'search' %}">
// see if you need csrf_token here when this is GET request. Your homework
2) 视图.py
def search(request):
if request.method == 'GET': # this will be GET now
book_name = request.GET.get('search') # do some research what it does
try:
status = Add_prod.objects.filter(bookname__icontains=book_name) # filter returns a list so you might consider skip except part
return render(request,"search.html",{"books":status})
else:
return render(request,"search.html",{})
3) django 模板应该是现在
{% if books %}
{% for each_book in books %} // books is list here so pick each element using for loop
<a href="{% url 'buy_book' pk=each_book.pk %}">
<!--Upon successful search book image with hyperlink appears -->
<img src="{{each_book.image.url}}" alt="No Image"></a>
<p>{{each_book.bookname}}</p>
<p>Rs.{{each_book.price}}</p>
{% endfor %}
{% endif %}
这应该工作正常。
还要确保您在 db 中有一些数据来获取一些搜索结果!
您将使用搜索选项的主 HTML 中的表单应如下所示:-
<form name="myform" method="GET" action="{% url 'search' %}">
<input type="text" name="search" placeholder="Search" /></form>
您需要将您的 views.py 编辑为
def search(request):
if request.GET.get('myform'): # write your form name here
book_name = request.GET.get('myform')
try:
status = Add_prod.objects.filter(bookname__icontains=book_name)
return render(request,"search.html",{"books":status})
except:
return render(request,"search.html",{'books':status})
else:
return render(request, 'search.html', {'books':status})
你的 Django 模板应该是这样的:-
{% if books %}
{% for each_book in books %}
<a href="{% url 'buy_book' pk=each_book.pk %}">
<img src="{{each_book.image.url}}" alt="No Image"></a>
<p>{{each_book.bookname}}</p>
<p>Rs.{{each_book.price}}</p>
{% endfor %}
{% endif %}
通过这样做,您的代码到那时就可以正常工作了......
看起来你需要使用for
,因为 books 是一个查询集
在模板中,尝试:
{% if books %}
{% for book in books %}
<a href="{% url 'buy_book' pk=book.pk %}">
<!--Upon successful search book image with hyperlink appears -->
<img src="{{book.image.url}}" alt="No Image"></a>
<p>{{book.bookname}}</p>
<p>Rs.{{book.price}}</p>
{% endfor %}
{% endif %}
在你看来:
相反:
book_name = request.POST.getlist('search')
尝试:
book_name = request.POST.get('search')
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