python-django-如何创建正确的类别和子类别-堆栈溢出

顺晟科技

2022-10-19 12:53:46

132

我目前在Django的商店工作，我有一个问题，因为我有一个类别和子类别的模型。问题是，我并不知道我做错了什么，因为在html文件中，我试图同时调用类别和子类别，但在每个类别中，所有的子类别都被显示出来，而不是属于特定的类别。我想请求您的帮助，并检查，如果下面的文件是正确的书写。提前感谢

models.py

from django.db import models
from django.urls import reverse


# Class model for category
class Category(models.Model):
    name = models.CharField(max_length=200,
                            db_index=True)
    slug = models.SlugField(max_length=200,
                            db_index=True)

    class Meta:
        ordering = ('name',)
        verbose_name = 'category'
        verbose_name_plural = 'categories'

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse('selcorshop:product_list_by_category',
                       args=[self.slug])


# Class model for subcategory
class Subcategory(models.Model):
    category = models.ForeignKey(Category,
                                 related_name='category',
                                 on_delete=models.CASCADE)
    name = models.CharField(max_length=200,
                            db_index=True)
    slug = models.SlugField(max_length=200,
                            db_index=True)

    class Meta:
        ordering = ('name',)
        verbose_name = 'subcategory'
        verbose_name_plural = 'subcategories'

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse('selcorshop:product_list_by_subcategory',
                       args=[self.slug])


# Class model for product
class Product(models.Model):
    subcategory = models.ForeignKey(Subcategory,
                                 related_name='products',
                                 on_delete=models.CASCADE)
    name = models.CharField(max_length=200, db_index=True)
    slug = models.SlugField(max_length=200, db_index=True)
    image = models.ImageField(upload_to='products/%Y/%m/%d',
                              blank=True)
    description = models.TextField(blank=True)
    price = models.DecimalField(max_digits=10, decimal_places=2)
    available = models.BooleanField(default=True)
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)

    class Meta:
        ordering = ('name',)
        index_together = (('id', 'slug'),)

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse('selcorshop:product_detail',
                       args=[self.id, self.slug])

views.py

from django.db import models
from django.urls import reverse


# Class model for category
class Category(models.Model):
    name = models.CharField(max_length=200,
                            db_index=True)
    slug = models.SlugField(max_length=200,
                            db_index=True)

    class Meta:
        ordering = ('name',)
        verbose_name = 'category'
        verbose_name_plural = 'categories'

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse('selcorshop:product_list_by_category',
                       args=[self.slug])


# Class model for subcategory
class Subcategory(models.Model):
    category = models.ForeignKey(Category,
                                 related_name='category',
                                 on_delete=models.CASCADE)
    name = models.CharField(max_length=200,
                            db_index=True)
    slug = models.SlugField(max_length=200,
                            db_index=True)

    class Meta:
        ordering = ('name',)
        verbose_name = 'subcategory'
        verbose_name_plural = 'subcategories'

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse('selcorshop:product_list_by_subcategory',
                       args=[self.slug])


# Class model for product
class Product(models.Model):
    subcategory = models.ForeignKey(Subcategory,
                                 related_name='products',
                                 on_delete=models.CASCADE)
    name = models.CharField(max_length=200, db_index=True)
    slug = models.SlugField(max_length=200, db_index=True)
    image = models.ImageField(upload_to='products/%Y/%m/%d',
                              blank=True)
    description = models.TextField(blank=True)
    price = models.DecimalField(max_digits=10, decimal_places=2)
    available = models.BooleanField(default=True)
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)

    class Meta:
        ordering = ('name',)
        index_together = (('id', 'slug'),)

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse('selcorshop:product_detail',
                       args=[self.id, self.slug])

urls.py

from django.db import models
from django.urls import reverse


# Class model for category
class Category(models.Model):
    name = models.CharField(max_length=200,
                            db_index=True)
    slug = models.SlugField(max_length=200,
                            db_index=True)

    class Meta:
        ordering = ('name',)
        verbose_name = 'category'
        verbose_name_plural = 'categories'

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse('selcorshop:product_list_by_category',
                       args=[self.slug])


# Class model for subcategory
class Subcategory(models.Model):
    category = models.ForeignKey(Category,
                                 related_name='category',
                                 on_delete=models.CASCADE)
    name = models.CharField(max_length=200,
                            db_index=True)
    slug = models.SlugField(max_length=200,
                            db_index=True)

    class Meta:
        ordering = ('name',)
        verbose_name = 'subcategory'
        verbose_name_plural = 'subcategories'

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse('selcorshop:product_list_by_subcategory',
                       args=[self.slug])


# Class model for product
class Product(models.Model):
    subcategory = models.ForeignKey(Subcategory,
                                 related_name='products',
                                 on_delete=models.CASCADE)
    name = models.CharField(max_length=200, db_index=True)
    slug = models.SlugField(max_length=200, db_index=True)
    image = models.ImageField(upload_to='products/%Y/%m/%d',
                              blank=True)
    description = models.TextField(blank=True)
    price = models.DecimalField(max_digits=10, decimal_places=2)
    available = models.BooleanField(default=True)
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)

    class Meta:
        ordering = ('name',)
        index_together = (('id', 'slug'),)

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse('selcorshop:product_detail',
                       args=[self.id, self.slug])

list.html

from django.db import models
from django.urls import reverse


# Class model for category
class Category(models.Model):
    name = models.CharField(max_length=200,
                            db_index=True)
    slug = models.SlugField(max_length=200,
                            db_index=True)

    class Meta:
        ordering = ('name',)
        verbose_name = 'category'
        verbose_name_plural = 'categories'

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse('selcorshop:product_list_by_category',
                       args=[self.slug])


# Class model for subcategory
class Subcategory(models.Model):
    category = models.ForeignKey(Category,
                                 related_name='category',
                                 on_delete=models.CASCADE)
    name = models.CharField(max_length=200,
                            db_index=True)
    slug = models.SlugField(max_length=200,
                            db_index=True)

    class Meta:
        ordering = ('name',)
        verbose_name = 'subcategory'
        verbose_name_plural = 'subcategories'

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse('selcorshop:product_list_by_subcategory',
                       args=[self.slug])


# Class model for product
class Product(models.Model):
    subcategory = models.ForeignKey(Subcategory,
                                 related_name='products',
                                 on_delete=models.CASCADE)
    name = models.CharField(max_length=200, db_index=True)
    slug = models.SlugField(max_length=200, db_index=True)
    image = models.ImageField(upload_to='products/%Y/%m/%d',
                              blank=True)
    description = models.TextField(blank=True)
    price = models.DecimalField(max_digits=10, decimal_places=2)
    available = models.BooleanField(default=True)
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)

    class Meta:
        ordering = ('name',)
        index_together = (('id', 'slug'),)

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse('selcorshop:product_detail',
                       args=[self.id, self.slug])

顺晟科技：

所以，在看到代码之后，我想您应该创建一个下拉菜单，其中所有与类别相关的子类别列表都打开，这样您就可以用在子类别模型a中传递的相关名称来调用它，在HTML中使用它，就像

from django.db import models
from django.urls import reverse


# Class model for category
class Category(models.Model):
    name = models.CharField(max_length=200,
                            db_index=True)
    slug = models.SlugField(max_length=200,
                            db_index=True)

    class Meta:
        ordering = ('name',)
        verbose_name = 'category'
        verbose_name_plural = 'categories'

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse('selcorshop:product_list_by_category',
                       args=[self.slug])


# Class model for subcategory
class Subcategory(models.Model):
    category = models.ForeignKey(Category,
                                 related_name='category',
                                 on_delete=models.CASCADE)
    name = models.CharField(max_length=200,
                            db_index=True)
    slug = models.SlugField(max_length=200,
                            db_index=True)

    class Meta:
        ordering = ('name',)
        verbose_name = 'subcategory'
        verbose_name_plural = 'subcategories'

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse('selcorshop:product_list_by_subcategory',
                       args=[self.slug])


# Class model for product
class Product(models.Model):
    subcategory = models.ForeignKey(Subcategory,
                                 related_name='products',
                                 on_delete=models.CASCADE)
    name = models.CharField(max_length=200, db_index=True)
    slug = models.SlugField(max_length=200, db_index=True)
    image = models.ImageField(upload_to='products/%Y/%m/%d',
                              blank=True)
    description = models.TextField(blank=True)
    price = models.DecimalField(max_digits=10, decimal_places=2)
    available = models.BooleanField(default=True)
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)

    class Meta:
        ordering = ('name',)
        index_together = (('id', 'slug'),)

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return reverse('selcorshop:product_detail',
                       args=[self.id, self.slug])

这必须解决您的问题，如果您还有任何问题请告诉我

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python-django-如何创建正确的类别和子类别-堆栈溢出