django.db.utils.ProgrammingError : Could not load : column "" of relation "" does not exist

Question

我刚刚向我的模型添加了一个字段，并将该字段的值添加到我的装置中。但是，我收到此错误:

django.db.utils.ProgrammingError: Problem installing fixture 'app/fixtures/tool.json': Could not load "": column "new_field" of relation "app_model" does not exist

这与我在将值放入夹具之前遇到的错误相同。我忘记了什么？

这是回溯:

Traceback (most recent call last):
  File "./manage.py", line 12, in <module>
    execute_from_command_line(sys.argv)
  File "/webapps/my_app/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 367, in execute_from_command_line
    utility.execute()
  File "/webapps/my_app/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 359, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/webapps/my_app/local/lib/python2.7/site-packages/django/core/management/base.py", line 294, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/webapps/my_app/local/lib/python2.7/site-packages/django/core/management/base.py", line 345, in execute
    output = self.handle(*args, **options)
  File "/webapps/my_app/local/lib/python2.7/site-packages/django/core/management/commands/loaddata.py", line 64, in handle
    self.loaddata(fixture_labels)
  File "/webapps/my_app/local/lib/python2.7/site-packages/django/core/management/commands/loaddata.py", line 104, in loaddata
    self.load_label(fixture_label)
  File "/webapps/my_app/local/lib/python2.7/site-packages/django/core/management/commands/loaddata.py", line 167, in load_label
    obj.save(using=self.using)
  File "/webapps/my_app/local/lib/python2.7/site-packages/django/core/serializers/base.py", line 201, in save
    models.Model.save_base(self.object, using=using, raw=True, **kwargs)
  File "/webapps/my_app/local/lib/python2.7/site-packages/django/db/models/base.py", line 824, in save_base
    updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
  File "/webapps/my_app/local/lib/python2.7/site-packages/django/db/models/base.py", line 889, in _save_table
    forced_update)
  File "/webapps/my_app/local/lib/python2.7/site-packages/django/db/models/base.py", line 939, in _do_update
    return filtered._update(values) > 0
  File "/webapps/my_app/local/lib/python2.7/site-packages/django/db/models/query.py", line 654, in _update
    return query.get_compiler(self.db).execute_sql(CURSOR)
  File "/webapps/my_app/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 1148, in execute_sql
    cursor = super(SQLUpdateCompiler, self).execute_sql(result_type)
  File "/webapps/my_app/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 835, in execute_sql
    cursor.execute(sql, params)
  File "/webapps/my_app/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 79, in execute
    return super(CursorDebugWrapper, self).execute(sql, params)
  File "/webapps/my_app/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)
  File "/webapps/my_app/local/lib/python2.7/site-packages/django/db/utils.py", line 94, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/webapps/my_app/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)
django.db.utils.ProgrammingError: Problem installing fixture '/webapps/my_app/tools/fixtures/tools.json': Could not load myapp.model(pk=3): column "new_field" of relation "myapp_model" does not exist
LINE 1: ..._LOCK,android.permission.RECEIVE_BOOT_COMPLETED', "new_field"...

Answer 1

所以我解决这个问题的方式没有多大意义。我通过手动将列添加到表中来完成此操作。然后我运行了migrate。由于我第二次迁移时拥有该列，因此错误更改为列已存在。然后我删除了该列，它自动创建了该列。我不确定为什么它一开始就不起作用，但如果您遇到此问题，请调整数据库。