搜索功能

Question

django，这个搜索功能正在工作，但是数据没有显示在模板上。我是django的初学者。请帮帮我

view.py：

def search(request):
    search_machinename = request.GET.get('q')
    if (search_machinename is not None) and search_machinename:
        machinename = Item.objects.filter(QuerySet(machinename__icontains=search_machinename) | 
        QuerySet(operationno__icontains=search_machinename))
        if not machinename:
            machinename = Item.objects.all()

    context = {'machinename': machinename}

    return render(request, 'usermaster/item-form.html', context)

模板文件: item-form.html：此模板的网页

<form action="{{url.search}}" method='get' value='{{ request.get.q }}' enctype="multipart/form-data">
    {% csrf_token %}
    {{fields}}

    <input type="text" name="q" value='{{ request.GET.q }}'>
    <button type="submit">Search</button>
    <table>
        {% for data in machinename %}
        <tr>
            <td>{{ data.machine_name }}</td>
            <td>{{ data.operation_no }}</td>
        </tr>
        {% endfor %}
    </table>
</form>

代码正在工作，但它不在网页上显示。

Answer 1

您在Queryset或Q中拼错了模型字段名、operationno__icontains和machinename__icontains。

像这样改变它们：

# views.py
from django.shortcuts import render
from .models import Item
from django.db.models import Q

def search(request):
    search_machine_name = request.GET.get('q')
    context = {}
    if (search_machine_name is not None) and search_machine_name:
        machine_name = Item.objects.filter(Q(machine_name__icontains=search_machine_name) | 
        Q(operation_no__icontains=search_machine_name))
        if not machine_name:
            machine_name = Item.objects.all()

        context['machine_name'] = machine_name

    return render(request, 'usermaster/item-form.html', context)

# templates/usermaster/item-form.html
<form action="{{url.search}}" method='get' value='{{ request.get.q }}' enctype="multipart/form-data">
    {% csrf_token %}
    {{fields}}

    <input type="text" name="q" value='{{ request.GET.q }}'>
    <button type="submit">Search</button>
    <table>
        {% for data in machine_name %}
        <tr>
            <td>{{ data.machine_name }}</td>
            <td>{{ data.operation_no }}</td>
        </tr>
        {% endfor %}
    </table>
</form>

# models.py
from django.db import models

class Item(models.Model):
    machine_name = models.CharField(max_length= 200)
    operation_no = models.IntegerField()
    def __str__(self): 
        return self.machine_name

# Project urls.py
from django.contrib import admin
from django.urls import path, include

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', include(('<your_app_name>.urls', 'url'), namespace='url')),
]

# your app urls.py
from .views import search
from django.urls import path

urlpatterns = [
    path('search', search, name='search')
]