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我正在用 Django 开发一个应用程序。

我尝试将 a 添加Hstorefield到我的模型中，然后将其删除，现在我无法再运行该命令manage.py makemigrations，因为我总是收到此错误

(met5) C:\Users\Tommaso\Django rest framework\Udemy Django\Metaglossario_Gestisco>python manage.py migrate Operations to perform:   Apply all migrations: admin, app_metaglossario, auth, contenttypes, sessions Running migrations:   Applying app_metaglossario.0045_model_node_data...Traceback (most recent call last):   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
    return self.cursor.execute(sql, params) psycopg2.ProgrammingError: can't adapt type 'dict'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):   File "manage.py", line 21, in <module>
    main()   File "manage.py", line 17, in main
    execute_from_command_line(sys.argv)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\core\management\__init__.py", line 381, in execute_from_command_line
    utility.execute()   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\core\management\__init__.py", line 375, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\core\management\base.py", line 323, in run_from_argv
    self.execute(*args, **cmd_options)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\core\management\base.py", line 364, in execute
    output = self.handle(*args, **options)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\core\management\base.py", line 83, in wrapped
    res = handle_func(*args, **kwargs)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\core\management\commands\migrate.py", line 234, in handle
    fake_initial=fake_initial,   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\migrations\executor.py", line 117, in migrate
    state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\migrations\executor.py", line 147, in _migrate_all_forwards
    state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\migrations\executor.py", line 245, in apply_migration
    state = migration.apply(state, schema_editor)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\migrations\migration.py", line 124, in apply
    operation.database_forwards(self.app_label, schema_editor, old_state, project_state)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\migrations\operations\fields.py", line 112, in database_forwards
    field,   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\backends\base\schema.py", line 447, in add_field
    self.execute(sql, params)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\backends\base\schema.py", line 137, in execute
    cursor.execute(sql, params)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\backends\utils.py", line 99, in execute
    return super().execute(sql, params)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\backends\utils.py", line 67, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\backends\utils.py", line 76, in _execute_with_wrappers
    return executor(sql, params, many, context)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\utils.py", line 89, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
    return self.cursor.execute(sql, params) django.db.utils.ProgrammingError: can't adapt type 'dict'

(met5) C:\Users\Tommaso\Django rest framework\Udemy Django\Metaglossario_Gestisco>python manage.py makemigrations Migrations for 'app_metaglossario':   app_metaglossario\migrations\0054_model_node.py
    - Create model model_node

(met5) C:\Users\Tommaso\Django rest framework\Udemy Django\Metaglossario_Gestisco>python manage.py migrate Operations to perform:   Apply all migrations: admin, app_metaglossario, auth, contenttypes, sessions Running migrations:   Applying app_metaglossario.0045_model_node_data...Traceback (most recent call last):   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
    return self.cursor.execute(sql, params) psycopg2.ProgrammingError: can't adapt type 'dict'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):   File "manage.py", line 21, in <module>
    main()   File "manage.py", line 17, in main
    execute_from_command_line(sys.argv)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\core\management\__init__.py", line 381, in execute_from_command_line
    utility.execute()   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\core\management\__init__.py", line 375, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\core\management\base.py", line 323, in run_from_argv
    self.execute(*args, **cmd_options)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\core\management\base.py", line 364, in execute
    output = self.handle(*args, **options)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\core\management\base.py", line 83, in wrapped
    res = handle_func(*args, **kwargs)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\core\management\commands\migrate.py", line 234, in handle
    fake_initial=fake_initial,   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\migrations\executor.py", line 117, in migrate
    state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\migrations\executor.py", line 147, in _migrate_all_forwards
    state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\migrations\executor.py", line 245, in apply_migration
    state = migration.apply(state, schema_editor)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\migrations\migration.py", line 124, in apply
    operation.database_forwards(self.app_label, schema_editor, old_state, project_state)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\migrations\operations\fields.py", line 112, in database_forwards
    field,   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\backends\base\schema.py", line 447, in add_field
    self.execute(sql, params)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\backends\base\schema.py", line 137, in execute
    cursor.execute(sql, params)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\backends\utils.py", line 99, in execute
    return super().execute(sql, params)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\backends\utils.py", line 67, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\backends\utils.py", line 76, in _execute_with_wrappers
    return executor(sql, params, many, context)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\utils.py", line 89, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value   File "C:\Applicazioni_Tommaso\Phyton\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
    return self.cursor.execute(sql, params) django.db.utils.ProgrammingError: can't adapt type 'dict'

看起来 Hstorefiels 仍然对我的数据库有一些影响。

我试图清空我放置 Hstorefield 的模型，然后删除它，但什么也没有。我什至从 Heroku 重置了我的数据库，但错误不断弹出。

我怎样才能摆脱它？

4

2 回答 2

2

阅读 2.0 或更高版本的Django 文档，明确指出您需要在 PostgreSQL 中设置 hstore 扩展。我也遇到了同样的错误，要解决这个问题，试试这个：

sudo su - postgres              //switch to postgres user
\c database;                     //connect your database
CREATE EXTENSION IF NOT EXISTS hstore;      //create extension
于 2019-12-04T07:02:29.347 回答
1

请按照以下步骤使其正常工作

  1. 在您的设置中添加 django.contrib.postgres 作为已安装应用程序的一部分。

  2. 在使用 hstore 字段的迁移之前创建一个迁移，并将以下代码复制并粘贴到迁移文件中。

    from django.db import models, migrations
from django.contrib.postgres.operations import HStoreExtension, UnaccentExtension

class Migration(migrations.Migration):

    dependencies = [
        ('main', '0001_initial'),
    ]

    operations = [
        HStoreExtension(),
        UnaccentExtension()
    ]

  3. 创建添加 hstore 字段的迁移。

  4. 运行迁移。

这对我有用！

于 2021-03-29T19:57:25.337 回答