如何处理此错误：__init__() 有一个意外的关键字参数“book_category”

Posted 2023-02-24

【中文标题】如何处理此错误：__init__() 有一个意外的关键字参数“book_category”

【英文标题】：How do I handle this error : __init__() got an unexpected keyword argument 'book_category'

【发布时间】：2021-03-19 08:45:57

【问题描述】：

我正在尝试输入一些书籍数据并使用 django 将其保存到我的数据库中（尝试制作网络图书馆）

但是我遇到这种错误：

init() 得到了一个意外的关键字参数“book_category”

错误似乎在这行代码中：

form = CategoryForm(book_category= book_category)

这是我的views.py的代码

class AddBook(View):
    def post(self, request):
        form = BooksForm(request.POST, request.FILES)
        if form.is_valid()  
            book_category = request.POST.get('book_category')
            firstname = request.POST.get('Firstname')
            lastname = request.POST.get('Lastname')
            author = Author.objects.filter(Q(firstname__icontains = firstname) & Q(lastname__icontains = lastname))
            if author:
                print(author)
            else:
                form = AuthorForm(firstname=firstname, lastname=lastname)
                form.save()
            
            category = Category.objects.filter(Q(book_category__icontains = book_category))
            if category:
                print(category)
            else:
                form = CategoryForm(book_category= book_category)
                form.save()

            author = Author.objects.filter(Q(firstname__icontains = firstname) & Q(lastname__icontains = lastname))
            for a in author:
                print(a.book_author_id)
                for c in category:
                    print(c.book_category_no)
                    book_title = request.POST.get('book_title')
                    book_cover = request.FILES.get('book_cover')
                    book_file = request.FILES.get('book_file')
                    book_year = request.POST.get('book_year')
                    book_tags = request.POST.get('book_tags')
                    book_summary = request.POST.get('book_summary')
                    form = Books(book_title = book_title, book_author_id = Author.objects.get(book_author_id = a.book_author_id), book_cover = book_cover,
                        book_file = book_file, book_year = book_year, book_summary = book_summary, book_category_no = Category.objects.get(book_category_no = c.book_category_no),
                        is_bookmarked = 0, is_downloaded = 0, is_read = 0, is_deleted = 0)

                    form.save()
                    return HttpResponse('Book Saved!')
        else:
            print(form.errors)
            return HttpResponse('Not Valid')

这是我的models.py：

class Category(models.Model):
    book_category_no = models.AutoField(primary_key=True)
    book_category = models.CharField(max_length=100)

    class Meta:
        db_table = "Category"

class Books(models.Model):
    book_id = models.AutoField(primary_key=True)
    book_title = models.CharField(max_length = 100)
    book_author_id = models.ForeignKey(Author, on_delete=models.CASCADE)
    book_cover = models.ImageField(upload_to='media/')
    book_file = models.FileField(upload_to='media/')
    book_year = models.DateField()
    book_tags = models.CharField(max_length = 100)
    book_summary = models.CharField(max_length = 100)
    book_category_no = models.ForeignKey(Category, on_delete=models.CASCADE)
    date_added = models.DateField(default=timezone.now)
    # book_info = models.CharField(max_length = 100, default="")
    is_bookmarked = models.BooleanField()
    is_downloaded = models.BooleanField()
    is_read = models.BooleanField()

    is_deleted= models.BooleanField(default=False)
    
    class Meta:
        db_table = "Books"

我不知道 Web 开发的新手发生了什么，我已经坚持了好几天了。我真的很感激一些帮助:)

【参考方案1】：

当您调用以下代码时，问题出在代码中的多个实例：

book_category__icontains 

从您的模型中可以看出，您没有book_category 字段，您拥有的是book_category_no 字段。

但在尝试更改此设置之前，您可能需要重命名模型字段。这里有些例子。好的名字会让调试更容易。

class Category(models.Model):
    # book_category_no = models.AutoField(primary_key=True) # no need for this.
    # book_category = models.CharField(max_length=100)
    name = models.CharField(max_length=100

    class Meta:
        db_table = "Category"

class Books(models.Model):
    #book_id = models.AutoField(primary_key=True)# no need for this
    title = models.CharField(max_length = 100)
    author= models.ForeignKey(Author, on_delete=models.CASCADE)# do not use author_id, use just author
    # similarly: 
    cover = models.ImageField(upload_to='media/')
    file = models.FileField(upload_to='media/')
    year = models.DateField()
    tags = models.CharField(max_length = 100)
    summary = models.CharField(max_length = 100)
    #when referring foreignkey, no need to add _no or _id after the name.
    category = models.ForeignKey(Category, on_delete=models.CASCADE)
    date_added = models.DateField(default=timezone.now)
    # book_info = models.CharField(max_length = 100, default="")
    is_bookmarked = models.BooleanField()
    is_downloaded = models.BooleanField()
    is_read = models.BooleanField()

    is_deleted= models.BooleanField(default=False)
    
    class Meta:
        db_table = "Books"

【讨论】：

哇，非常感谢！有效！我会按照你所说的关于名称的提示进行操作。