如何在Django中将数据添加到数据库中？

Question

我在解决该问题方面遇到麻烦...请帮助我摆脱这个错误...它还在打印值并且数据库表已经创建。以下是我的代码，错误提示类似异常值：

save（）缺少1个必需的位置参数：“ self”

//This is my model.py file
rom django.db import models


class Reg(models.Model):
    name = models.CharField(max_length=20) 

//this is my form.py file
from django import forms


class RegistrationForm(forms.Form):
    name = forms.CharField()   


//this is my view.py file
from django.shortcuts import render
    from .forms import RegistrationForm
    from .models import Reg


    def ragistration(request):
        if request.method == "POST":
            form = RegistrationForm(request.POST)
            if form.is_valid():
                Reg.name = form.cleaned_data.get('name')
                Reg.save()
                print(Reg.name)
        else:
            form = RegistrationForm()
        return render(request, 'registration/reg.html', {"form": form})



    //I got this error
    Exception Value:    
    save() missing 1 required positional argument: 'self'

Answer 1

您没有创建类Reg的实例。试试这个

reg = Reg()
reg.name = form.cleaned_data.get('name')
reg.save()

Answer 2

我们只必须在模型类的实例上调用save方法。我们可以使用模型表格来简化它。

forms.py

from django import  forms
from .models import Reg

class RegistrationForm(forms.ModelForm):
    name = forms.CharField()
    class Meta:
       model = Reg
       fields = '__all__'

views.py

from django.http import HttpResponse
from .forms import RegistrationForm   

def ragistration(request):
        if request.method == "POST":
            form = RegistrationForm(request.POST)
            if form.is_valid():
                form.save()
                return HttpResponse("Object Saved") 
        else:
            form = RegistrationForm()
        return render(request, 'registration/reg.html', {"form": form})

Answer 3

您可以在这里做几件事。

1：使用插入表格的模型表格

class RegistrationForm(forms.ModelForm):
    class Meta:
        model = Reg
        fields = ['name']

2：在您看来，请注意form.is_valid（）部分：

def ragistration(request):
    if request.method == "POST":
        form = RegistrationForm(request.POST)
        if form.is_valid():
            form.save()
            print(form.name)
    else:
        form = RegistrationForm()
    return render(request, 'registration/reg.html', {"form": form})