"""Mock a FileField's 'file' attribute for template compatibility with S3-stored files."""

def __init__(self, key, name):

    self.key = key

    self.name = name

@property

def url(self):

    return default_storage.url(self.key)

def read(self, *args, **kwargs):

    with default_storage.open(self.key) as f:

        return f.read(*args, **kwargs)

def __str__(self):

    return self.key

"""

Represents a post, optionally linked to a task.

"""

task = models.ForeignKey(

    Task,

    on_delete=models.CASCADE,

    related_name="posts",

    null=True,

    blank=True

)

author = models.ForeignKey(

    User,

    on_delete=models.CASCADE,

    related_name="posts"

)

title = models.CharField(max_length=255)

content = models.TextField()

created_at = models.DateTimeField(auto_now_add=True, db_index=True)

updated_at = models.DateTimeField(auto_now=True)

class Meta:

    ordering = ["-created_at"]

    indexes = [

        models.Index(fields=['task', '-created_at'], name='post_task_created_idx'),

    ]

def __str__(self):

    return self.title

"""

Stores files associated with a post.

"""

post = models.ForeignKey(

    Post,

    on_delete=models.CASCADE,

    related_name='files'

)

file_key = models.CharField(max_length=1024, null=True, blank=True)

file_name = models.CharField(max_length=255, null=True, blank=True)

file_size = models.PositiveBigIntegerField(null=True, blank=True)

uploaded_at = models.DateTimeField(auto_now_add=True)

def __str__(self):

    return f"{self.post.title} - {self.file_name}"

@property

def filename(self):

    return self.file_name

@property

def file(self):

    if not self.file_key:

        return None

    return S3FileWrapper(self.file_key, self.file_name)

class Meta:

    ordering = ['-uploaded_at']

    indexes = [

        models.Index(fields=['post', '-uploaded_at'], name='postfile_post_uploaded_idx'),

    ]

                        <i class="bi bi-file-earmark-arrow-down"></i>

                        <span class="text-truncate" style="max-width: 200px;">{{ file.filename }}</span>

                    </a>

                    {% endfor %}

                </div> what am i doing wrong?