我没有手动设置主键。这怎么可能发生？
相关代码：
for im_url in image_urls:
print(im_url)
if im_url.split('.')[-1] != 'gif' and '/' in im_url.split('.com/')[1]:
img_temp = NamedTemporaryFile(delete=True)
img_temp.write(urllib.request.urlopen(im_url).read())
img_temp.flush()
img_filename = slugify(im_url.split('.com/')[1].split('/')[1])[:50]
print(img_filename)
try:
attack_image_object = AttackImage.objects.create(
title=img_filename,
source_url=im_url,
creator=mike
)
except Exception as e:
print(e)
continue
attack_image_object.image.save(img_filename, File(img_temp))
attack_item_object = AttackItem.objects.create(
attack_image=attack_image_object,
attack='SPA',
creator=mike,
)
attack_item.hidden_data_found = (attacks.spa(attack_image.image) > 0.05)
attack_item.save()
print('%s created' % (img_filename))
模型
class AttackImage(models.Model):
title = models.CharField(max_length=255)
image = models.ImageField(upload_to='attack_images', blank=True, null=True)
source_url = models.URLField(blank=True,null=True)
domain = models.ForeignKey(Domain, on_delete=models.CASCADE, blank=True, null=True)
creator = models.ForeignKey(User, on_delete=models.CASCADE, blank=True,null=True)
slug = models.SlugField(blank=True,null=True)
def save(self, *args, **kwargs):
if not self.slug:
self.slug = slugify(self.title)[:50]
if self.source_url and not self.image:
result = urllib.request.urlretrieve(self.source_url)
self.image.save(
os.path.basename(self.source_url),
File(open(result[0], 'rb'))
)
if self.source_url:
if '//' in self.source_url:
d = self.source_url.split('//')[1].split('/')[0]
else:
d = self.source_url.split('/')[0]
try:
domain = Domain.objects.get(domain_url=d)
except Exception as e:
print(e)
domain_object = Domain.objects.create(domain_url=d)
domain = domain_object
self.domain = domain
return super(AttackImage, self).save(*args, **kwargs)
def get_absolute_url(self):
return reverse("attack_image_detail", kwargs={
'pk': str(self.id),
'slug': str(self.slug)})
回溯
Traceback (most recent call last):
File "crawl_ebaumsworld.py", line 91, in <module>
crawl(first_url)
File "crawl_ebaumsworld.py", line 65, in crawl
creator=mike
File "/home/michael/projects/deepsteg/venvdeepsteg/lib/python3.6/site-packages/django/db/models/manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/home/michael/projects/deepsteg/venvdeepsteg/lib/python3.6/site-packages/django/db/models/query.py", line 422, in create
obj.save(force_insert=True, using=self.db)
File "/home/michael/projects/deepsteg/engine/models.py", line 64, in save
return super(AttackImage, self).save(*args, **kwargs)
File "/home/michael/projects/deepsteg/venvdeepsteg/lib/python3.6/site-packages/django/db/models/base.py", line 741, in save
force_update=force_update, update_fields=update_fields)
File "/home/michael/projects/deepsteg/venvdeepsteg/lib/python3.6/site-packages/django/db/models/base.py", line 779, in save_base
force_update, using, update_fields,
File "/home/michael/projects/deepsteg/venvdeepsteg/lib/python3.6/site-packages/django/db/models/base.py", line 870, in _save_table
result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
File "/home/michael/projects/deepsteg/venvdeepsteg/lib/python3.6/site-packages/django/db/models/base.py", line 908, in _do_insert
using=using, raw=raw)
File "/home/michael/projects/deepsteg/venvdeepsteg/lib/python3.6/site-packages/django/db/models/manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/home/michael/projects/deepsteg/venvdeepsteg/lib/python3.6/site-packages/django/db/models/query.py", line 1186, in _insert
return query.get_compiler(using=using).execute_sql(return_id)
File "/home/michael/projects/deepsteg/venvdeepsteg/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 1335, in execute_sql
cursor.execute(sql, params)
File "/home/michael/projects/deepsteg/venvdeepsteg/lib/python3.6/site-packages/django/db/backends/utils.py", line 99, in execute
return super().execute(sql, params)
File "/home/michael/projects/deepsteg/venvdeepsteg/lib/python3.6/site-packages/django/db/backends/utils.py", line 67, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "/home/michael/projects/deepsteg/venvdeepsteg/lib/python3.6/site-packages/django/db/backends/utils.py", line 76, in _execute_with_wrappers
return executor(sql, params, many, context)
File "/home/michael/projects/deepsteg/venvdeepsteg/lib/python3.6/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "/home/michael/projects/deepsteg/venvdeepsteg/lib/python3.6/site-packages/django/db/utils.py", line 89, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/home/michael/projects/deepsteg/venvdeepsteg/lib/python3.6/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
django.db.utils.IntegrityError: duplicate key value violates unique constraint "engine_attackimage_pkey"
DETAIL: Key (id)=(19) already exists.
在Django的5年编程经验中，我从未遇到过这个错误。仅查看代码和回溯，就无法判断出问题所在。有什么事吗让我知道是否需要发布更多代码。提前致谢。任何帮助表示赞赏。
答案 0 :(得分：0)
您正在尝试使用保存方法保存子模型。
self.image.save(
os.path.basename(self.source_url),
File(open(result[0], 'rb'))
)
因此，您需要在调用super的save方法之前保存模型。在调用super的save方法之前，应该设置图像但不保存。
self.image = os.path.basename(self.source_url),File(open(result[0], 'rb'))
答案 1 :(得分：0)
我想可能的解决方法是：
./manage.py migrate appname zero
用您的应用程序名称修改应用程序名称。 然后：
python manage.py migrate --run-syncdb