从数据库检索数据时出现问题。views.py中出现相对导入错误

2024-10-17 06:21:35 发布

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我的model.py，views.py forms.py，html模板已完成，但我无法从数据库检索数据

我试图运行我的views python文件，但它无法运行，并且显示了相对导入错误。我的代码中是否存在错误或其他问题。请说明一下，因为我在这方面浪费了一整天，结果为0 我的视图中出现了错误。请注意
文件“views.py”，第5行，在 从。表格导入注册1 ImportError:尝试在没有已知父包的情况下进行相对导入 views.py 从django.shortcuts导入渲染

#from django.http import RequestContext
#from django.http import HttpResponseRedirect
from .forms import Registration1
from .models import Category


#print('__file__={0:<35} | __name__={1:<20} | __package__={2: 
#<20}'.format(__file__,__name__,str(__package__)))
#count = 5

# Create your views here.

def home(request):      
  
       
#print(context_dict.values())
  
if request.method == 'POST':
stud1 = ' '
cm =Registration1(request.POST)
if cm.is_valid():
      cm1 = cm.cleaned_data['category']
      
      sm1  = cm.cleaned_data['subcateg']

      pm1 = cm.cleaned_data['product']

      reg2 = Category(category = cm1,subcateg = sm1,product = pm1)
      reg2.save()
      cm = Registration1()
    
else :

 cm = Registration1()
 stud1 = Category.objects.all()
 print(stud1)

return render(request,'registration.html', {'forms': cm ,'Register' : 
stud1} 
)

Models.py

from django.conf import settings
from django.db import models

class Category(models.Model):
category = models.CharField(max_length=50,null =True)
subcateg = models.CharField(max_length=50,null = True)
product = models.CharField(max_length=50,null = True)

Forms.py

from django import forms
from .models import Category

class Registration1(forms.ModelForm) :
class Meta :
    model = Category
    fields = ['product','subcateg','category']   
    widgets  = {
        'product' : forms.TextInput(attrs={'class':'form-control'}),
        'subcateg' : forms.TextInput(attrs={'class':'form-control'}),
        'category' : forms.TextInput(attrs={'class':'form-control'})
         ,
    }

Registration.html

<!DOCTYPE html>
{% load static %}
<html lang="en">
<head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <title>Document</title>
   <link rel = "stylesheet" href ="{% static  'project/css/bootstrap.css ' 
%}">
</head>
<body>
 <div class =  "container mt-5">
   
    <div class = "row">   

      
        <div class = "col-sm-0"> 
           <h4 class = "text-centre alert alert-info ">Add Product </h4>
        
             <form action = '' method = "POST"> 
                 {% csrf_token %}
  
   
                   {{forms.as_p}}
   
   
                     <br>
                     <input type = "submit" class = "btn btn-success" 
                      value="add">
             </form>
        </div>
        <div class="col-sm-8">
           <h4 class = "text-centre alert alert-info">DataBase Table</h4>
                  
             {% if Register %}
                         
              <table class="table table-striped table-dark">
                <thead>
                 <tr>
                   <th scope="col">ID</th>
                   <th scope="col">PRODUCT</th>
                   <th scope="col">SUBCATEGORY</th>
                   <th scope="col">CATEGORY</th>
                 </tr>
                </thead>
                <tbody>
                  {% for st in Register %}
                        
                               <tr>
                                  <th scope ="row">{{st.id}}</th>
                                  <td>{{st.product}}</td>
                                  <td>{{st.subcateg}}</td>
                                  <td>{{st.category}}</td>
                               </tr>
                  {% endfor %}
                </tbody>
              </table>
             {% endif %}
                

            </div>
        </div> 
    
      </div>

  <script src = "{% static 'project/css/jQuery.js' %}"></script>
  <script src = "{% static 'project/css/popper.js'%}"></script>
  <script src = "{% static 'project/css/bootstrap.js' %}"></script>

</body>
</html>

Tags： djangofrompyimportdivmodelshtmlcm
1条回答
网友
1楼 · 发布于 2024-10-17 06:21:35

所以我想你需要声明一个像here这样的外键。 应该是这样的

class ProductMan(models.Model):
    subcategory= models.ForeignKey(WebSubCategory, on_delete=models.CASCADE)


class WebSubCategory(models.Model):
    category= models.ForeignKey(Category, on_delete=models.CASCADE)

我不知道模板中是否有错误，因为你没有发布它们

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