0

我为数据库创建了一个索引。

res = yield dbEmail["emails"].create_index([("subject", pymongo.TEXT)])

现在我正在尝试搜索创建的索引

dbEmail["emails"].find({$text: {$search: "dogs"}}, {score: {$meta: "textScore"}}).sort({score: {$meta: "textScore"}})

我发现这不起作用。电机文档说 db.collection.find(filter) 中的 filter 参数是一个 SON 对象。当我在我的集​​合上尝试 list_indexes() 时，它们也是 SON 对象。但是之后

for index in (yield dbEmail["emails"].list_indexes()):
    searchResults = yield dbEmail["emails"].find(index)

也会导致错误。我们如何使用电机对索引进行 $text 搜索？

编辑：回复尼尔

我的初始数据库集合如下所示：

emails = {"_id" : ObjectId("xxcxcdsfas"),"subject": "Joe owns a dog", "content": "Dogs are man's best friend", "likes": 60, "year": 2015,"language": "english"},
         {"_id" : ObjectId("xxcxcdsfas"),"subject": "Dogs eat cats and dog eats pigeons too", "content": "Cats are not evil", "likes": 30, "year": 2015,"language": "english"},
         {"_id" : ObjectId("xxcxcdsfas"),"subject": "Cats eat rats", "content": "Rats do not cook food", "likes": 55, "year": 2014, "language": "english"},
         {"_id" : ObjectId("xxcxcdsfas"), "subject": "Rats eat Joe", "content": "Joe ate a rat", "likes": 75, "year": 2014, "language": "english"}

在创建索引（正在创建，我已经验证）之后，我需要的最终结果应该是这样的，

{ "_id" : ObjectId("xxcxcdsfas"), "subject" : "Dogs eat cats and dog eats pigeons too", "content" : "Cats are not evil", "likes" : 30, "year" : 2015, "language" : "english", "score" : 1 }
{ "_id" : ObjectId("xxcxcdsfas"), "subject" : "Joe owns a dog", "content" : "Dogs are man's best friend", "likes" : 60, "year" : 2015, "language" : "english", "score" : 0.6666666666666666 }

第一个得分更高，因为狗在主题中出现了两次，而第二个中出现了一次。

我使用以下代码检查了索引是否有效：

    for item in (yield dbEmail["emails"].index_information()).items():
        print(item)

响应或索引如下：

('_id_', {'v': 2, 'key': [('_id', 1)], 'ns': 'emailInfo.emails'})
('subject_text', {'v': 2, 'key': [('_fts', 'text'), ('_ftsx', 1)], 'ns': 'emailInfo.emails', 'weights': SON([('subject', 1)]), 'default_language': 'english', 'language_override': 'language', 'textIndexVersion': 3})
4

1 回答 1

0

终于解决了，命令“db.collection.command()”让它工作了，

searchResults = yield dbEmail.command({"find": "emails",
                                      "filter": {"$text": { "$search": "dogs"}}})
于 2017-09-08T11:21:50.747 回答