Question

更新模型和序列化器后，我无法将新文章保存到数据库中。我不断收到“'title'是此函数的无效关键字参数。”

我正在研究Postgres10，Python3.6，Django2.0和DRF 3.8.2。

我删除了我的数据库几次，但错误仍然存在。拜托我需要你的帮忙。提前致谢。

这是我的旧型号的副本

'remove'

我的新（更新）型号：

class Article(models.Model):
    title = models.CharField(max_length=200, blank=False)
    slug = models.SlugField(max_length=250, unique_for_date='created')
    body = models.TextField()
    image_url = models.URLField(max_length=255)
    author = models.ForeignKey(User, on_delete=models.CASCADE)
    created = models.DateTimeField(auto_now_add = True) 
    published = models.DateTimeField(auto_now=True)
    updated = models.DateTimeField(auto_now=True)
    country = models.ForeignKey(Country, on_delete=models.CASCADE)
    categories = models.ManyToManyField(Category, default=1)
    # categories = ArrayField(models.IntegerField(), blank=False)
    entities = models.ManyToManyField(Entity, default=1)
    # entities = ArrayField(models.CharField(max_length=200), 
    blank=True)
    summary = models.TextField(blank=True)
    is_published = models.BooleanField(default=False)
    is_curated = models.BooleanField(default=False)

    class Meta:
        ordering = ('-created',)

    def __str__(self):
        return self.title

    def save(self, *args, **kwargs):
        self.slug = slugify(self.title)
        super(Article, self).save(*args, **kwargs)

我的序列化器：

class Article(models.Model):
    title = models.CharField(max_length=200, blank=False)
    slug = models.SlugField(max_length=250, unique_for_date='created')
    body = models.TextField()
    image_url = models.URLField(max_length=255)
    author = models.ForeignKey(User, on_delete=models.CASCADE)
    created = models.DateTimeField(auto_now_add = True) 
    published = models.DateTimeField(auto_now=True)
    updated = models.DateTimeField(auto_now=True)
    country = models.ForeignKey(Country, on_delete=models.CASCADE, 
    related_name="posts")
    category = models.OneToOneField(Category, 
    on_delete=models.CASCADE, 
    default=1, related_name="posts")
    entities = models.ManyToManyField(Entity, default=1, 
    related_name="posts")
    summary = models.TextField()
    keypoint1 = models.CharField(max_length=500, blank=False, 
    null=False)
    keypoint2 = models.CharField(max_length=500, blank=False, 
    null=False)
    keypoint3 = models.CharField(max_length=500, blank=True,  
    null=True)
    keypoint4 = models.CharField(max_length=500, blank=True, 
    null=True)
    is_published = models.BooleanField(default=False)
    is_curated = models.BooleanField(default=False)

    class Meta:
        ordering = ('-created',)
    def __str__(self):
        return self.title


    def save(self, *args, **kwargs):
        self.slug = slugify(self.title)
        super(Article, self).save(*args, **kwargs)

我的创建帖子视图：

class CreateArticleSerializer(serializers.ModelSerializer):
    author = UserSerializer(read_only=True, required=False)
    country = CountrySerializer(read_only=True)

    class Meta:
        model = Article
        fields = ("id", "title", "body", "image_url", "country", 
        "keypoint1", "keypoint2", "keypoint3", "keypoint4", 
        "category", "entities", "author", "created", "updated", 
        "published", "is_published")
        read_only_fields = ("id", "created", "slug")

    def create(self, validated_data):

        entities_relations = validated_data.pop('entities', None)
        entity_instance = Entity.objects.create(**validated_data)
        entity_instance.posts = entities_relations
        article = Article.objects.create(entities=entity_instance, 
        **validated_data)


        return article

Answer 1

在序列化程序的create方法上，您尝试使用Entity的数据字段创建一个Article：

    entities_relations = validated_data.pop('entities', None)
    entity_instance = Entity.objects.create(**validated_data)

您没有指定发生错误的行，但似乎在这里。我不知道Entity模型的字段，但标题似乎不是其中之一。

Answer 2

您确定

entity_instance = Entity.objects.create(**validated_data)

?? 实体模型是否接受与第一条相同的字段？

“ title”是此函数的无效关键字参数[Python + Django + DRF]

2 个答案: