Django 2.0 SQLite3到MySQL loaddata错误：“0”；数据库后端不接受0作为AutoField的值；

我正在尝试将数据库从sqlite传输到mysql

我在谷歌上搜索了这个错误并找到了堆栈溢出匹配项，但还没有看到如何调试/识别有问题的“0值自动字段”字段。我试图通过转储/加载不同的表来回避这个问题，但所有的表似乎都会产生相同的错误

我已尝试将

-e contenttypes

、

--natural foreign

和

--natural primary

附加到我的datadump命令，例如

python manage.py dumpdata -e contenttypes --natural-foreign --natural-primary --indent=4 > datadump_3-7-18.json

运行

python manage.py loaddata之后--回溯datadump_3-7-18.json

它会产生回溯错误：

(venv) ➜  bikerental git:(additional-features-march) ✗ python manage.py loaddata --traceback datadump_3-7-18.json
Traceback (most recent call last):
  File "manage.py", line 15, in <module>
    execute_from_command_line(sys.argv)
  File "/rentals/venv/lib/python3.6/site-packages/django/core/management/__init__.py", line 371, in execute_from_command_line
    utility.execute()
  File "/rentals/venv/lib/python3.6/site-packages/django/core/management/__init__.py", line 365, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/rentals/venv/lib/python3.6/site-packages/django/core/management/base.py", line 288, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/rentals/venv/lib/python3.6/site-packages/django/core/management/base.py", line 335, in execute
    output = self.handle(*args, **options)
  File "/rentals/venv/lib/python3.6/site-packages/django/core/management/commands/loaddata.py", line 72, in handle
    self.loaddata(fixture_labels)
  File "/rentals/venv/lib/python3.6/site-packages/django/core/management/commands/loaddata.py", line 113, in loaddata
    self.load_label(fixture_label)
  File "/rentals/venv/lib/python3.6/site-packages/django/core/management/commands/loaddata.py", line 177, in load_label
    obj.save(using=self.using)
  File "/rentals/venv/lib/python3.6/site-packages/django/core/serializers/base.py", line 205, in save
    models.Model.save_base(self.object, using=using, raw=True, **kwargs)
  File "/rentals/venv/lib/python3.6/site-packages/django/db/models/base.py", line 759, in save_base
    updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
  File "/rentals/venv/lib/python3.6/site-packages/django/db/models/base.py", line 842, in _save_table
    result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
  File "/rentals/venv/lib/python3.6/site-packages/django/db/models/base.py", line 880, in _do_insert
    using=using, raw=raw)
  File "/rentals/venv/lib/python3.6/site-packages/django/db/models/manager.py", line 82, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/rentals/venv/lib/python3.6/site-packages/django/db/models/query.py", line 1125, in _insert
    return query.get_compiler(using=using).execute_sql(return_id)
  File "/rentals/venv/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 1280, in execute_sql
    for sql, params in self.as_sql():
  File "/rentals/venv/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 1233, in as_sql
    for obj in self.query.objs
  File "/rentals/venv/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 1233, in <listcomp>
    for obj in self.query.objs
  File "/rentals/venv/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 1232, in <listcomp>
    [self.prepare_value(field, self.pre_save_val(field, obj)) for field in fields]
  File "/rentals/venv/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 1172, in prepare_value
    value = field.get_db_prep_save(value, connection=self.connection)
  File "/rentals/venv/lib/python3.6/site-packages/django/db/models/fields/__init__.py", line 767, in get_db_prep_save
    return self.get_db_prep_value(value, connection=connection, prepared=False)
  File "/rentals/venv/lib/python3.6/site-packages/django/db/models/fields/__init__.py", line 940, in get_db_prep_value
    value = connection.ops.validate_autopk_value(value)
  File "/rentals/venv/lib/python3.6/site-packages/django/db/backends/mysql/operations.py", line 163, in validate_autopk_value
    raise ValueError('The database backend does not accept 0 as a '
ValueError: Problem installing fixture '/rentals/bikerental/datadump_3-7-18.json': The database backend does not accept 0 as a value for AutoField.

---

有什么方法可以更容易地识别我认为这是从数据库中的什么地方来的？

我已经通过手动编辑数据转储解决了这个问题。在ManyToManyField引用的表中，有一条ID为0的记录。这是因为我最初手动输入了一组记录，从0开始递增。删除此记录并删除ManyToManyField中对它的引用，可以使loaddata命令正常工作。为了记录在案，我只想声明错误处理可以/应该通过更明确的方式来改进，因为这让我几乎一整天都在挠头

关于

datadump_3-7-18.json中的说明：

{                                 <----- I GOT DELETED  
    "model": "inventory.bike",    <----- I GOT DELETED  
    "pk": 0,                      <----- I GOT DELETED  
    "fields": {                   <----- I GOT DELETED   
       ...                        <----- I GOT DELETED  
    }                             <----- I GOT DELETED  
},                                <----- I GOT DELETED  
{
    "model": "inventory.bike",
    "pk": 1,
    "fields": {
       ...
    }
},
{
    "model": "inventory.bike",
    "pk": 2,
    "fields": {
       ...
    }
},

我通过手动编辑数据转储解决了这个问题。在ManyToManyField引用的表中，有一条ID为0的记录。这是因为我最初手动输入了一组记录，从0开始递增。删除此记录并删除ManyToManyField中对它的引用，可以使loaddata命令正常工作。为了记录在案，我只想说，错误处理可以/应该通过更明确的方式来改进，因为这让我几乎一整天都在挠头。你应该把这句话作为一个答案——这很有趣。@Shadow啊，是的。我会的。非常感谢。
{                                 <----- I GOT DELETED  
    "model": "inventory.bike",    <----- I GOT DELETED  
    "pk": 0,                      <----- I GOT DELETED  
    "fields": {                   <----- I GOT DELETED   
       ...                        <----- I GOT DELETED  
    }                             <----- I GOT DELETED  
},                                <----- I GOT DELETED  
{
    "model": "inventory.bike",
    "pk": 1,
    "fields": {
       ...
    }
},
{
    "model": "inventory.bike",
    "pk": 2,
    "fields": {
       ...
    }
},

{
    "model": "reservations.reservation",
    "pk": 55,
    "fields": {
       ...
        "bike": [
            0,      <----- I GOT DELETED   
            1,
            2
        ]
    }
},
{
    "model": "reservations.reservation",
    "pk": 28,
    "fields": {
        ...
        "bike": [
            0,      <----- I GOT DELETED  
            1,
            2,
            3
        ]
    }
},