问题

Sure, here is the translated code snippet:

我正在尝试获取一个保存文件路径的方法，类似于`<employee_id>/<prefix>_<filename>`。我如何在`User_directory_path`类中获取`<employee_id>`？

在这段代码中，我只能获取到`<license_id>`：

```python
import uuid
from django.db import models
from django.utils.deconstruct import deconstructible
from django_minio_backend import MinioBackend

@deconstructible
class User_directory_path(object):
    def __init__(self, prefix):
        self.prefix = prefix

    def __call__(self, instance, filename):
        return f'{instance.id}/{self.prefix}_{filename}';


class DocumentStatus(models.TextChoices):
    NOT_UPLOADED = 'NOT_UPLOADED'
    ON_REVIEW = 'ON_REVIEW'


class License(models.Model):
    id = models.CharField(primary_key=True, max_length=36, default=uuid.uuid4)
    license_0 = models.FileField(
        verbose_name='License(1)',
        storage=MinioBackend(
            bucket_name='django-backend-private',
            replace_existing=True),
        upload_to=User_directory_path('license_0'),
        max_length=255,
        null=True,
        blank=True,
    )
    license_0_status = models.CharField(
        verbose_name='License(1) Status',
        max_length=15,
        choices=DocumentStatus.choices,
        default=DocumentStatus.NOT_UPLOADED)
    license_1 = models.FileField(
        verbose_name='License(2)',
        storage=MinioBackend(
            bucket_name='django-backend-private',
            replace_existing=True),
        upload_to=User_directory_path('license_1'),
        max_length=255,
        null=True,
        blank=True,
    )
    license_1_status = models.CharField(
        verbose_name='License(2) Status',
        max_length=15,
        choices=DocumentStatus.choices,
        default=DocumentStatus.NOT_UPLOADED)


class Employee(models.Model):
    id = models.CharField(primary_key=True, max_length=36, default=uuid.uuid4)
    licenses = models.ManyToManyField(License, blank=True)

Is there anything else you would like to know or clarify?

import uuid
from django.db import models
from django.utils.deconstruct import deconstructible
from django_minio_backend import MinioBackend
@deconstructible
class User_directory_path(object):
def __init__(self, prefix):
self.prefix = prefix
def __call__(self, instance, filename):
return f'{instance.id}/{self.prefix}_{filename}'
class DocumentStatus(models.TextChoices):
NOT_UPLOADED = 'NOT_UPLOADED'
ON_REVIEW = 'ON_REVIEW'
class License(models.Model):
id = models.CharField(primary_key=True, max_length=36, default=uuid.uuid4)
license_0 = models.FileField(
verbose_name='License(1)',
storage=MinioBackend(
bucket_name='django-backend-private',
replace_existing=True),
upload_to=User_directory_path('license_0'),
max_length=255,
null=True,
blank=True,
)
license_0_status = models.CharField(
verbose_name='License(1) Status',
max_length=15,
choices=DocumentStatus.choices,
default=DocumentStatus.NOT_UPLOADED)
license_1 = models.FileField(
verbose_name='License(2)',
storage=MinioBackend(
bucket_name='django-backend-private',
replace_existing=True),
upload_to=User_directory_path('license_1'),
max_length=255,
null=True,
blank=True,
)
license_1_status = models.CharField(
verbose_name='License(2) Status',
max_length=15,
choices=DocumentStatus.choices,
default=DocumentStatus.NOT_UPLOADED)
class Employee(models.Model):
id = models.CharField(primary_key=True, max_length=36, default=uuid.uuid4)
licenses = models.ManyToManyField(License, blank=True)

答案1

得分: 1

以下是翻译好的部分：

"employee_id" 没有意义：您使用了一个 "ManyToManyField"，因此可以有零个、一个或多个 "Employee"，即使确实有一个，这两者也仅在 "License" 和 "Employee" 构建之后才会链接。

因此，建模似乎不正确，您可能打算使用以下方式：

class License(models.Model):
    id = models.CharField(primary_key=True, max_length=36, default=uuid.uuid4)
    license_0 = models.FileField(
        verbose_name='License(1)',
        storage=MinioBackend(
            bucket_name='django-backend-private', replace_existing=True
        ),
        upload_to=UserDirectoryPath('license_0'),
        max_length=255,
        null=True,
        blank=True,
    )
    license_0_status = models.CharField(
        verbose_name='License(1) Status',
        max_length=15,
        choices=DocumentStatus.choices,
        default=DocumentStatus.NOT_UPLOADED,
    )
    license_1 = models.FileField(
        verbose_name='License(2)',
        storage=MinioBackend(
            bucket_name='django-backend-private', replace_existing=True
        ),
        upload_to=User_directory_path('license_1'),
        max_length=255,
        null=True,
        blank=True,
    )
    license_1_status = models.CharField(
        verbose_name='License(2) Status',
        max_length=15,
        choices=DocumentStatus.choices,
        default=DocumentStatus.NOT_UPLOADED,
    )
    employee = models.ForeignKey('Employee', on_delete=models.CASCADE)


class Employee(models.Model):
    id = models.CharField(primary_key=True, max_length=36, default=uuid.uuid4)

在这种情况下，您使用：

@deconstructible
class UserDirectoryPath(object):
    def __init__(self, prefix):
        self.prefix = prefix

    def __call__(self, instance, filename):
        return f'{instance.employee_id}/{self.prefix}_{filename}'

注意：请使用 UUIDField 来存储 UUID，而不是 CharField，这可以进行验证，以检查输入的数据是否确实是 UUID。

def __call__(self, instance, filename):
return f'{instance<b>.employee_id</b>}/{self.prefix}_{filename}'</code></pre>