[英]Django Rest Framework - Serializer doesn't work
我正在嘗試創建一個博客 API,其中包含用戶帖子和評論實例。 我正在使用 Django & Django Rest 框架來構建 API,它將以 JSON 格式返回數據。 以下是返回的 JSON 數據的示例:
"id": 2,
"user": 1,
"user_photo": "http://127.0.0.1:8000/media/users/abc.jpg",
"is_owner": true,
"description": "Hey there, this is my post and I like it",
"images": [
{
"id": 3,
"post": 2,
"image": "http://127.0.0.1:8000/media/posts/foo.jpg",
"comment": "This is image #1"
},
{
"id": 4,
"post": 2,
"image": "http://127.0.0.1:8000/media/posts/bar.jpg",
"comment": "This is image #2"
}
],
"created": "2022-03-23T16:58:44.800255+03:00",
"likes": [
1
],
"comment_count": 1,
"comments": [
{
"id": 3,
"post": 2,
"text": "This is a comment on my post",
"user": 1,
"likes": [],
"created": "2022-03-23T17:00:27.074362+03:00",
"images": [
3, <----- should be URL to the image, not just id (like above)
4 <----- should be URL to the image, not just id (like above)
]
}
]
}
我的問題是,雖然在 JSON 中正確返回了Post
圖像,但我的PostComment
圖像只是作為一個 id 數組返回,沒有 URL。 我在代碼中用箭頭指示了我試圖獲取對象數組(id 和 URL)的位置。 我懷疑這是由於序列化程序中的某些問題而發生的,但我無法查明它。 這是我的序列化程序代碼:
class PostCommentImageSerializer(serializers.ModelSerializer):
class Meta:
model = PostCommentImage
comment = serializers.ReadOnlyField(source='comment.id')
fields = ('id', 'comment', 'image')
read_only_fields = ('id', 'comment',)
class PostCommentSerializer(serializers.ModelSerializer):
class Meta:
model = PostComment
post = serializers.ReadOnlyField(source='post.id')
comment_images = PostCommentImageSerializer(many=True, read_only=True)
fields = ('id', 'post', 'text', 'likes', 'created', 'comment_images')
read_only_fields = ('id', 'created', 'comment_images', 'likes')
class PostImageSerializer(serializers.ModelSerializer):
class Meta:
model = PostImage
post = serializers.ReadOnlyField(source='post.id')
fields = ('id', 'post', 'image', 'comment')
read_only_fields = ('id', 'post')
class PostSerializer(serializers.ModelSerializer):
user_photo = serializers.SerializerMethodField(read_only=True)
is_owner = serializers.SerializerMethodField(read_only=True)
images = PostImageSerializer(many=True, read_only=True)
comments = PostCommentSerializer(many=True, read_only=True)
comment_count = serializers.ReadOnlyField()
class Meta:
model = Post
post = serializers.ReadOnlyField(source='post.id')
fields = ('id', 'user', 'user_photo', 'is_owner', 'description', 'images', 'created', 'likes', 'comment_count', 'comments',)
read_only_fields = ('id', 'user', 'user_photo', 'is_owner', 'images', 'created', 'comments', 'comment_count',)
def get_user_photo(self, obj):
request = self.context.get('request')
user = request.user
return request.build_absolute_uri(obj.user.photo.url)
def get_is_owner(self, obj):
user = self.context['request'].user
if user == obj.user:
return True
else:
return user.is_superuser
正如您在我的PostCommentSerializer
中看到的那樣,我添加了行comment_images = PostCommentImageSerializer()
,因此它應該返回一個對象數組,而不僅僅是一個id
整數數組,並且related_name
中的models.py
被正確設置為“comment_images”,所以我不知道問題的根源是什么。
我懷疑這一定很簡單,但我找不到背后的原因。 任何幫助將不勝感激!
You have defined below serializer field in Meta class of PostCommentSerializer.
comment_images = PostCommentImageSerializer(
many=True, read_only=True)
Correct Implementation is :
class PostCommentSerializer(serializers.ModelSerializer):
comment_images = PostCommentImageSerializer(many=True, read_only=True)
class Meta:
model = PostComment
post = serializers.ReadOnlyField(source='post.id')
fields = ('id', 'post', 'text', 'likes', 'created', 'comment_images')
read_only_fields = ('id', 'created', 'comment_images', 'likes')
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.