将 django 表单保存到 mssql 数据库时，将数据类型 nvarchar 转换为数字时出错

Question

我正在将 django-pyodbc-azure 与 mssql 一起使用，并且我在 models.py:

中将一些字段设置为外键

class Production(models.Model):
    date = models.CharField(max_length=10, null=True)
    dateGr = models.DateField(auto_now=False, auto_now_add=False, null=True)
    comName = models.CharField(max_length=100, null=True)
    comId = models.ForeignKey(Company, on_delete=models.CASCADE, null=True)
    prodName = models.CharField(max_length=100, null=True)
    prodId = models.ForeignKey(Product, on_delete=models.CASCADE, null=True)
    gradeId = models.ForeignKey(ProductGrade, on_delete=models.CASCADE, null=True)
    gradeName = models.CharField(max_length=100, null=True)
    gradeType = models.CharField(max_length=3, null=True)
    gradeTypeId = models.ForeignKey(GradeType, on_delete=models.CASCADE, null=True)
    qty = models.FloatField(null=True)
    cap = models.FloatField(null=True)
    designCap = models.FloatField(null=True)
    plan = models.FloatField(null=True)
    unitId = models.ForeignKey(QtyUnit, on_delete=models.CASCADE, null=True)
    unit = models.CharField(max_length=20, null=True)

我的 forms.py 是这样写的：

class CreateProduction(forms.ModelForm):
    class Meta:
        model = Production
        fields = ['date', 'comId', 'prodId', 'gradeId', 'gradeTypeId', 'unitId', 'qty']
        
        widgets = {
        'date': forms.TextInput(attrs={'class': 'form-control', 'name': 'tdate', 'id': 'input-tdate'}),
        'comId': forms.Select(attrs={'class': 'form-control'}),
        'prodId': forms.Select(attrs={'class': "form-control"}),
        'gradeId': forms.Select(attrs={'class': 'form-control'}),
        'gradeTypeId': forms.Select(attrs={'class': 'form-control'}),
        'unitId': forms.Select(attrs={'class': 'form-control'}),
        'qty': forms.NumberInput(attrs={'class': 'form-control', 'id': 'qty', 'type': 'number', 'value': '0'}),     
        }

    def __init__(self, user, comId, *args, **kwargs):
        super(CreateProduction, self).__init__(*args, **kwargs)
        self.fields['comId'].queryset = Company.objects.filter(userId=user)
        self.fields['prodId'].queryset = Product.objects.filter(comId=comId)
        products = Product.objects.filter(comId=comId)
        self.fields['gradeId'].queryset = ProductGrade.objects.filter(prodId__in=products)

处理将我的表单数据保存到数据库的函数如下：

@login_required(login_url='login')
@allowed_users(allowed_roles=['editor'])
def create_production(request):
    print(request)
    if request.method == 'POST':
        comId = Company.objects.values_list('id', flat=True).get(userId=request.user)
        form = CreateProduction(request.user, comId, request.POST)    
        if form.is_valid():
            production = form.save(commit=False)
            print(request.POST)
            production.user = request.user
            production.save()
            return redirect('/')
    else:
        comId = Company.objects.values_list('id', flat=True).get(userId=request.user)
        form = CreateProduction(request.user, comId)
    return render(request, 'production/production_form.html', {'form': form})

当我从我的 forms.py 中删除与“unitId”相关的行时，整个代码工作得非常好，模板和数据被插入到数据库中。但是当我添加与“unitId”相关的行时，我得到了这个错误： ('42000', '[42000] [Microsoft][ODBC Driver 17 for SQL Server][SQL Server]Error converting data type nvarchar to numeric. (8114) (SQLExecDirectW )') 我不明白“unitId”字段有什么问题

Answer 1

所以问题是日期的值，因为我的项目日期是波斯语，我必须在我的模型中将日期字段定义为 CharField，因为日期的值是波斯语数据库不接受该值，因为它是Unicode 所以我在 views.py 中添加了一行，如下所示：

production.date = unidecode(str(request.POST.get('date')))

这修正了错误。

将 django 表单保存到 mssql 数据库时，将数据类型 nvarchar 转换为数字时出错

Getting error converting data type nvarchar to numeric while saving django form to mssql database

python

sql-server

django

django-forms

django-pyodbc-azure