django – haystack.exceptions.SearchBackendError：在任何sear

我一直收到这个错误,虽然一切似乎都配置得很好.我收到错误：

haystack.exceptions.SearchBackendError: No fields were found in any search_indexes. Please correct this before attempting to search.

…当我尝试做./manage.py rebuild_index

组态：

HAYSTACK_SITECONF = 'myproject'
HAYSTACK_SEARCH_ENGINE = 'whoosh'
HAYSTACK_WHOOSH_PATH = cwd + '/whoosh/mysite_index'

在我的项目的根文件夹中成功创建了whoosh / mysite_index目录.

* search_sites.py *

import haystack
haystack.autodiscover()

* search_indexes.py *

from haystack.indexes import *
from haystack import site
from myproject.models import *

class ResearchersIndex(SearchIndex):
    text = CharField(document=True,use_template=True)
    name = CharFIeld(model_attr='name')

class SubjectIndex(SearchIndex):
    short_name = CharField(model_attr='short_name')
    name = CharField(model_attr='name')
    text = CharField(document=True,use_template=True)

class ResearchIndex(SearchIndex):
    text = CharField(document=True,use_template=True)
    abstract = TextField(model_attr='abstract')
    methodology = TextField(model_attr='methodology')
    year = IntegerField(model_attr='year')
    name = CharField(model_attr='name')


class Graph(SearchIndex):
    text = CharField(document=True,use_template=True)
    explanation = TextField(model_attr='explanation')
    type = CharField(model_attr='type')
    name = CharField(model_attr='name')

site.register(Researchers,ResearchersIndex)
site.register(Subject,SubjectIndex)
site.register(Research,ResearchIndex)
site.register(Graph,GraphIndex)

谢谢