django - django-haystack 和 elasticsearch 中缺少 connection_alias 参数

Question

带有 elasticsearch 的 Django-haystack 缺少“connection_alias”参数。

我正在设置一个 django 应用程序，其中 django-haystack 使用 elasticsearch 作为搜索引擎后端。但是，模块中缺少“connection_alias”参数

HAYSTACK_CONNECTIONS 在 settings.py 中设置了 elasticsearch

HAYSTACK_CONNECTIONS = {
    'default': {
        'ENGINE': 'haystack.backends.elasticsearch_backend.ElasticsearchSearchBackend',
        'URL': 'http://127.0.0.1:9200',
        'INDEX_NAME': 'haystack',
    }
}

search_indexes.py 模型也在下面设置:

from haystack import indexes
from .models import Post


class PostIndex(indexes.SearchIndex, indexes.Indexable):
    text = indexes.CharField(document=True, use_template=True)
    publish = indexes.DateTimeField(model_attr='publish')

    def get_model(self):
        return Post

    def index_queryset(self):
        return self.get_model().published.all()

但是，在 django 应用程序的 manage.py 中运行 rebuild_index 命令时:

./manage.py rebuild_index

出现错误，表明“connection_alias”缺少参数

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 "/home/giddyupyup/Documents/Development/Python/projects/blogapp/venv/lib/python3.6/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
    utility.execute()
  File "/home/giddyupyup/Documents/Development/Python/projects/blogapp/venv/lib/python3.6/site-packages/django/core/management/__init__.py", line 375, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/giddyupyup/Documents/Development/Python/projects/blogapp/venv/lib/python3.6/site-packages/django/core/management/base.py", line 323, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/giddyupyup/Documents/Development/Python/projects/blogapp/venv/lib/python3.6/site-packages/django/core/management/base.py", line 364, in execute
    output = self.handle(*args, **options)
  File "/home/giddyupyup/Documents/Development/Python/projects/blogapp/venv/lib/python3.6/site-packages/haystack/management/commands/rebuild_index.py", line 41, in handle
    call_command('clear_index', **clear_options)
  File "/home/giddyupyup/Documents/Development/Python/projects/blogapp/venv/lib/python3.6/site-packages/django/core/management/__init__.py", line 148, in call_command
    return command.execute(*args, **defaults)
  File "/home/giddyupyup/Documents/Development/Python/projects/blogapp/venv/lib/python3.6/site-packages/django/core/management/base.py", line 364, in execute
    output = self.handle(*args, **options)
  File "/home/giddyupyup/Documents/Development/Python/projects/blogapp/venv/lib/python3.6/site-packages/haystack/management/commands/clear_index.py", line 52, in handle
    backend = connections[backend_name].get_backend()
  File "/home/giddyupyup/Documents/Development/Python/projects/blogapp/venv/lib/python3.6/site-packages/haystack/utils/loading.py", line 109, in __getitem__
    self.thread_local.connections[key] = load_backend(self.connections_info[key]['ENGINE'])(using=key)
TypeError: __init__() missing 1 required positional argument: 'connection_alias'

干草堆环境是否需要任何额外的设置才能正常工作？

我正在使用这个 Django 设置环境:

Django==2.2
django-haystack==2.8.1
elasticsearch==5.5.3

请帮忙。

Answer 1

您可能已经解决了这个问题，但对于遇到这里的每个人来说，它发生的简单原因是因为您需要指定 发动机 而不是后端。

...
'ENGINE': 'haystack.backends.elasticsearch_backend.ElasticsearchSearchEngine',
...

见 https://django-haystack.readthedocs.io/en/master/settings.html#haystack-connections