Django Haystack ElasticSearch Python3-Java 学习之路

我的计划是让Django在Debian 7.5-64bit机器上使用Python3运行ElasticSearch后端 .

我将解释每一步，因为我既不是专业的管理员，也不是一个现成的开发人员 . 不要忘记，我在第三天晚上处理这个问题，我觉得我已经尝试过互联网上的每一个提示 .

首先，我在/ usr / local /中解压缩，配置，制作，测试，安装Python-3.4.1 . 这在usr / local / bin中创建了链接/ bin . 所以我创建了从/ usr / bin到/ usr / local / bin的符号链接，并使用update-alternatives“安装”了不同的python3（来自debian中的3.2和3.4） . 我为python3和python3-config创建了替代品 .

与Java 8u11 Server-JRE相同 .

我继续安装Django 1.6.5，Haystack 2.1，pyelasticsearch 0.6.1，至少每个pip都安装在/ usr / bin和/ usr / local / bin中（pip还安装了请求2.3.0，simplejson 3.6.0,6 1.7.3） .

同时我还安装了0.99.2和urllib3 1.9 . 两者都有点子 .

Django已配置并运行，也是带有mod-wsgi模块的apache . 我创建了一个django项目和一个应用程序（还没有模型） . Elasticsearch也在运行，但还没有任何指示 .

到我的项目/ settings.py我编辑并添加：

INSTALLED_APPS = {...
'haystack'}
...
DATABASES = {
'default': {
    'ENGINE': 'haystack.backends.elasticsearch_backend.ElasticsearchSearchEngine',
    'URL': 'http://127.0.0.1:9200/',
    'NAME': 'haystack',
}
...
}
HAYSTACK_CONNECTIONS = {
'default': {
    'ENGINE': 'haystack.backends.elasticsearch_backend.ElasticsearchSearchEngine',
    'URL': 'http://127.0.0.1:9200/',
    'INDEX_NAME': 'haystack',
},
}

当我从projectfolder中运行./manage.py时，我收到以下错误：

./manage.py syncdb
Traceback (most recent call last):
  File "./manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 399, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 392, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 242, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 280, in execute
    translation.activate('en-us')
  File "/usr/local/lib/python2.7/dist-packages/django/utils/translation/__init__.py", line 130, in activate
    return _trans.activate(language)
  File "/usr/local/lib/python2.7/dist-packages/django/utils/translation/trans_real.py", line 188, in activate
    _active.value = translation(language)
  File "/usr/local/lib/python2.7/dist-packages/django/utils/translation/trans_real.py", line 177, in translation
    default_translation = _fetch(settings.LANGUAGE_CODE)
  File "/usr/local/lib/python2.7/dist-packages/django/utils/translation/trans_real.py", line 159, in _fetch
    app = import_module(appname)
  File "/usr/local/lib/python2.7/dist-packages/django/utils/importlib.py", line 40, in import_module
    __import__(name)
  File "/usr/local/lib/python2.7/dist-packages/django/contrib/admin/__init__.py", line 6, in <module>
    from django.contrib.admin.sites import AdminSite, site
  File "/usr/local/lib/python2.7/dist-packages/django/contrib/admin/sites.py", line 4, in <module>
    from django.contrib.admin.forms import AdminAuthenticationForm
  File "/usr/local/lib/python2.7/dist-packages/django/contrib/admin/forms.py", line 6, in <module>
    from django.contrib.auth.forms import AuthenticationForm
  File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/forms.py", line 17, in <module>
    from django.contrib.auth.models import User
  File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/models.py", line 48, in <module>
    class Permission(models.Model):
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 96, in __new__
    new_class.add_to_class('_meta', Options(meta, **kwargs))
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 264, in add_to_class
    value.contribute_to_class(cls, name)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/options.py", line 124, in contribute_to_class
    self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
  File "/usr/local/lib/python2.7/dist-packages/django/db/__init__.py", line 34, in __getattr__
    return getattr(connections[DEFAULT_DB_ALIAS], item)
  File "/usr/local/lib/python2.7/dist-packages/django/db/utils.py", line 198, in __getitem__
    backend = load_backend(db['ENGINE'])
  File "/usr/local/lib/python2.7/dist-packages/django/db/utils.py", line 131, in load_backend
    raise ImproperlyConfigured(error_msg)
django.core.exceptions.ImproperlyConfigured: 'haystack.backends.elasticsearch_backend.ElasticsearchSearchEngine' isn't an available database backend.
Try using 'django.db.backends.XXX', where XXX is one of:
    u'mysql', u'oracle', u'postgresql_psycopg2', u'sqlite3'
Error was: No module named ElasticsearchSearchEngine.base

就像manage.py中的shebang所说，这样使用python2.7 . 然后强制我的python 3.4 interpeter：

python3 ./manage.py syncdb
Traceback (most recent call last):
  File "<frozen importlib._bootstrap>", line 2218, in _find_and_load_unlocked
AttributeError: 'module' object has no attribute '__path__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.4/site-packages/django/db/utils.py", line 113, in load_backend
    return import_module('%s.base' % backend_name)
  File "/usr/local/lib/python3.4/importlib/__init__.py", line 109, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 2254, in _gcd_import
  File "<frozen importlib._bootstrap>", line 2237, in _find_and_load
  File "<frozen importlib._bootstrap>", line 2212, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 321, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 2254, in _gcd_import
  File "<frozen importlib._bootstrap>", line 2237, in _find_and_load
  File "<frozen importlib._bootstrap>", line 2221, in _find_and_load_unlocked
ImportError: No module named 'haystack.backends.elasticsearch_backend.ElasticsearchSearchEngine'; 'haystack.backends.elasticsearch_backend' is not a package

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "./manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python3.4/site-packages/django/core/management/__init__.py", line 399, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python3.4/site-packages/django/core/management/__init__.py", line 392, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python3.4/site-packages/django/core/management/base.py", line 242, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/local/lib/python3.4/site-packages/django/core/management/base.py", line 280, in execute
    translation.activate('en-us')
  File "/usr/local/lib/python3.4/site-packages/django/utils/translation/__init__.py", line 130, in activate
    return _trans.activate(language)
  File "/usr/local/lib/python3.4/site-packages/django/utils/translation/trans_real.py", line 188, in activate
    _active.value = translation(language)
  File "/usr/local/lib/python3.4/site-packages/django/utils/translation/trans_real.py", line 177, in translation
    default_translation = _fetch(settings.LANGUAGE_CODE)
  File "/usr/local/lib/python3.4/site-packages/django/utils/translation/trans_real.py", line 159, in _fetch
    app = import_module(appname)
  File "/usr/local/lib/python3.4/importlib/__init__.py", line 109, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 2254, in _gcd_import
  File "<frozen importlib._bootstrap>", line 2237, in _find_and_load
  File "<frozen importlib._bootstrap>", line 2226, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 1200, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 1129, in _exec
  File "<frozen importlib._bootstrap>", line 1471, in exec_module
  File "<frozen importlib._bootstrap>", line 321, in _call_with_frames_removed
  File "/usr/local/lib/python3.4/site-packages/django/contrib/admin/__init__.py", line 6, in <module>
    from django.contrib.admin.sites import AdminSite, site
  File "/usr/local/lib/python3.4/site-packages/django/contrib/admin/sites.py", line 4, in <module>
    from django.contrib.admin.forms import AdminAuthenticationForm
  File "/usr/local/lib/python3.4/site-packages/django/contrib/admin/forms.py", line 6, in <module>
    from django.contrib.auth.forms import AuthenticationForm
  File "/usr/local/lib/python3.4/site-packages/django/contrib/auth/forms.py", line 17, in <module>
    from django.contrib.auth.models import User
  File "/usr/local/lib/python3.4/site-packages/django/contrib/auth/models.py", line 48, in <module>
    class Permission(models.Model):
  File "/usr/local/lib/python3.4/site-packages/django/db/models/base.py", line 96, in __new__
    new_class.add_to_class('_meta', Options(meta, **kwargs))
  File "/usr/local/lib/python3.4/site-packages/django/db/models/base.py", line 264, in add_to_class
    value.contribute_to_class(cls, name)
  File "/usr/local/lib/python3.4/site-packages/django/db/models/options.py", line 124, in contribute_to_class
    self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
  File "/usr/local/lib/python3.4/site-packages/django/db/__init__.py", line 34, in __getattr__
    return getattr(connections[DEFAULT_DB_ALIAS], item)
  File "/usr/local/lib/python3.4/site-packages/django/db/utils.py", line 198, in __getitem__
    backend = load_backend(db['ENGINE'])
  File "/usr/local/lib/python3.4/site-packages/django/db/utils.py", line 131, in load_backend
    raise ImproperlyConfigured(error_msg)
django.core.exceptions.ImproperlyConfigured: 'haystack.backends.elasticsearch_backend.ElasticsearchSearchEngine' isn't an available database backend.
Try using 'django.db.backends.XXX', where XXX is one of:
    'mysql', 'oracle', 'postgresql_psycopg2', 'sqlite3'
Error was: No module named 'haystack.backends.elasticsearch_backend.ElasticsearchSearchEngine'; 'haystack.backends.elasticsearch_backend' is not a package

ls显示，文件在那里，并且我看到一个编辑器，该类存在/usr/local/lib/python3.4/site-packages/haystack/backends/elasticsearch_backend.py

我忘记了什么吗？在python-lib目录下的“PYTHONPATH”中是否应该有任何内容？哪些信息也很重要？

至少：这种设置是否可行？我了解django-haystack和数据库后端的结构是否正确？

请帮我 . 我厌倦了并完成了来自django，haystack，elasticsearch和最具针对性的google点击的文档和样本 .

2 回答

0
syncdb命令将尝试将模型与数据库同步 . Django无法将ElasticsearchSearchEngine解释为数据库 . 您应该使用与您正在使用的数据库相对应的正确ENGINE值 .

例如对于MySQL
```
ENGINE='django.db.backends.mysql'
```
你打算使用数据库吗？如果没有，则不要运行syncdb .
回复于 2024-04-20T06:34:22+08:00
0
您的数据库设置错误 . 你应该在这里使用任何数据库引擎，如：
```
DATABASES = {
'default': {
    'ENGINE': 'django.db.backends.sqlite3',
    'NAME': 'mydatabase',
    }
}
```
如果您选择在项目中使用sqlite数据库 .
回复于 2024-04-20T06:34:22+08:00

Django Haystack ElasticSearch Python3

2 回答

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