Question

我正在使用最新版本的Django和DRF。但是运行它之后，我得到了这个错误：

HStoreDescriptor类（models.fields.subclassing.Creator）： AttributeError：模块'django.db.models.fields'没有属性'subclassing'

我不确定如何使用HStoreField以及如何通过迁移创建扩展。这是我的文件结构。

webhook10/
 |-- tutorial/
 |    |-- slack/                
 |    |    |-- migrations/
 |    |    |    +-- __init__.py
 |    |    |-- __init__.py
 |    |    |-- admin.py
 |    |    |-- apps.py
 |    |    |-- models.py
 |    |    |-- tests.py
 |    |    |-- urls.py
 |    |    +-- views.py
 |    |-- tutorial/
 |    |    |-- __init__.py
 |    |    |-- settings.py
 |    |    |-- urls.py
 |    |    |-- wsgi.py
 |    +-- manage.py
 +-- venv/

Models.py

from django.db import models
from django.utils import timezone
from django_hstore import hstore

class WebhookTransaction(models.Model):
    UNPROCESSED = 1
    PROCESSED = 2
    ERROR = 3

    STATUSES = (
        (UNPROCESSED, 'Unprocessed'),
        (PROCESSED, 'Processed'),
        (ERROR, 'Error'),
    )

    date_generated = models.DateTimeField()
    date_received = models.DateTimeField(default=timezone.now)
    body = hstore.SerializedDictionaryField()
    request_meta = hstore.SerializedDictionaryField()
    status = models.CharField(max_length=250, choices=STATUSES, default=UNPROCESSED)

    objects = hstore.HStoreManager()

    def __unicode__(self):
        return u'{0}'.format(self.date_event_generated)

class Message(models.Model):
    date_processed = models.DateTimeField(default=timezone.now)
    webhook_transaction = models.OneToOneField(WebhookTransaction)

    team_id = models.CharField(max_length=250)
    team_domain = models.CharField(max_length=250)
    channel_id = models.CharField(max_length=250)
    channel_name = models.CharField(max_length=250)
    user_id = models.CharField(max_length=250)
    user_name = models.CharField(max_length=250)
    text = models.TextField()
    trigger_word = models.CharField(max_length=250)

    def __unicode__(self):
        return u'{}'.format(self.user_name)

serializers.py

from rest_framework import serializers
from slack.models import WebhookTransaction, Message

class WebhookTransactionSerializer(serializers.ModelSerializer):
    class Meta:
        model = WebhookTransaction
        fields = '_all_'

class MessageSerializer(serializers.ModelSerializer):
    class Meta:
        model = Message
        fields = '_all_'

请告诉我我可以做什么？如果您需要更多信息，请询问。

Answer 1

您不需要导入django_hstore

在您的INSTALLED_APPS中添加'django.contrib.postgres'。

如果未在Postgres上启用hstrone，请运行sql脚本：CREATE EXTENSION IF NOT EXISTS hstore

在型号上：添加：from django.contrib.postgres.fields import HStoreField

添加字段：objects = HStoreField()

docs

Answer 2

在您的 INSTALLED_APPS 中添加'django.contrib.postgres'。
连接Postgresql并创建hstore扩展名：

sudo su - postgres \c database; CREATE EXTENSION IF NOT EXISTS hstore;
在您的模型中。py：

from django.contrib.postgres.fields import HStoreField class Section(models.Model): title = models.CharField(max_length=256) parameters = HStoreField(blank=True,null=True)
在终端上运行以下命令：

python manage.py makemigrations python manage.py migrate
默认情况下，它使您在丑陋的文本区域中编写JSON键值对。如果您喜欢精美的hstore小部件，则可以安装它：
1. pip install django-admin-hstore-widget。
2. 将django_admin_hstore_widget添加到您的INSTALLED_APPS（在settings.py中）
3. 然后在您应用的admin.py中添加此内容。
来自your_app.models导入部分

从Django导入表格中

从django_admin_hstore_widget.forms导入HStoreFormField
```
class SectionAdminForm(forms.ModelForm):
    parameters= HStoreFormField()

    class Meta:
        model = Section
        exclude = ()


@admin.register(Section)
class SectionAdmin(admin.ModelAdmin):
    form = SectionAdminForm
```

我到底该如何使用HStoreField？

2 个答案: