有没有办法阻止 Django 修剪文本字段中的前导空格？

Question

有没有办法阻止 Django 修剪 中的前导空格models.TextField？我一直在搜索文档，但没有找到任何东西。我使用的数据库是PSQL。任何指导将不胜感激。

一个答案让我意识到有一个使用表单的解决方案。截至目前，我不使用表格：

class Song(models.Model):
    """
    Fields that are displayed on the Song screeen
    """
    name = models.CharField(max_length=100, blank=True, default="")
    artist = models.CharField(max_length=100, blank=True, default="")
    creator = models.ForeignKey(get_user_model(), on_delete=models.CASCADE)
    lyrics = models.TextField(default="", blank=True)
    pulled_lyrics = models.TextField(default="", blank=True)
    chords = models.TextField(default="", blank=True)
    strumming_pattern = models.CharField(max_length=30, default="", blank=True)

    """
    Additional information used to determine where to display the song
    """
    public = models.BooleanField(default=False)
    is_favourite = models.BooleanField(default=False)

    def __str__(self):
        return self.name 

class SongViewSet(viewsets.ModelViewSet):
    serializer_class = SongSerializer

    def get_queryset(self):
        """
        Sets queryset to be songs owned by user
        This makes it so that a user can only manipulate their own songs
        """
        if not self.request.user.is_authenticated:
            return []

        user = self.request.user
        qs = Song.objects.all()
        if user.is_superuser:
            return qs
        else:
            return qs.filter(creator=user)
    
    def create(self, request):
        """
        Create user with given request body
        """
        try:
            song = Song.objects.create(creator=request.user, **request.data)
        except:
            return Response('The provided data was of an invalid form.', status=status.HTTP_400_BAD_REQUEST)
        song_serializer = SongSerializer(song)
        return Response(song_serializer.data, status=status.HTTP_200_OK)

分别创建新歌曲和修补歌曲的 JS (React) 代码：

const response = await axios.post(
                "/api/songs/",
                {},
                {
                    withCredentials: true,
                    headers: {
                        "X-CSRFToken": getToken(),
                    },
                }
            );

const songCopy = { ...item }
    delete songCopy["creator"];
    axios.patch(`/api/songs/${item.id}/`, songCopy, {
        withCredentials: true,
        headers: {
            "Content-Type": "application/json",
            "X-CSRFToken": getToken(),
        },
    });

Answer 1

是的，您的表单字段应该在表单中设置strip=False[Django-doc] ，所以：

class MyForm(forms.Form):
    some_field = forms.CharField(strip=False)

对于序列化器来说，这非常相似，在序列化器中您应该设置trim_whitespace=False[DRF-doc]：

from rest_framework import serializers

class SongSerializer(ModelSerializer):
    lyrics = serializers.CharField(trim_whitespace=False)

正如文档所说：

如果True（默认），该值将被去除前导和尾随空格。

如果渲染数据，则多个（前导）空格将在网页上呈现为一个空格。您可以使用<pre>标签作为预格式化文本元素，因此：

{{ 一些_变量 }}