部分文本匹配GAE

我正在开发一个用于管理客户的Web应用程序 . 所以我有一个Customer实体，它由通常的字段组成，例如first_name，last_name，age等 .

我有一个页面，这些客户显示为表格 . 在同一页面中，我有一个搜索字段，我想在用户使用Ajax在搜索字段中键入内容时过滤客户并更新表格 . 这是它应该如何工作：

图1：显示所有客户的主页面：

图2：只要用户键入字母"b"，表就会更新结果：

鉴于GAE不支持部分文本匹配，我已经欺骗并实现了它来自here： TL;DR: I have created a Customers Index, that contains a Search Document for every customer(doc_id=customer_key). Each Search Document contains Atom Fields for every customer's field I want to be able to search on(eg: first_name, last_name): every field is made up like this: suppose the last_name is Berlusconi, the field is going to be made up by these Atom Fields "b" "be" "ber" "berl" "berlu" "berlus" "berlusc" "berlusco" "berluscon" "berlusconi" . 通过这种方式，我能够以类似于部分文本匹配的方式执行全文匹配 . 如果我搜索"Be"，贝卢斯科尼的客户将被退回 .

搜索是通过Ajax调用进行的：每当用户键入搜索字段时（ajax会稍微看一下用户是否继续键入，以避免发送一连串请求），使用查询字符串进行Ajax调用，并返回一个json对象 .

现在，事情在调试方面运行良好，但我在数据存储区中与少数人一起测试它 . 只要我放了很多人，搜索看起来很慢 .

这就是我创建搜索文档的方式 . 每次将新客户放入数据存储区时都会调用此方法 .

def put_search_document(cls, key):
    """
    Called by _post_put_hook in BaseModel
    """
    model = key.get()
    _fields = []
    if model:
        _fields.append(search.AtomField(name="empty", value=""),)  # to retrieve customers when no query string
        _fields.append(search.TextField(name="sort1", value=model.last_name.lower()))
        _fields.append(search.TextField(name="sort2", value=model.first_name.lower()))

        _fields.append(search.TextField(name="full_name", value=Customer.tokenize1(
            model.first_name.lower()+" "+model.last_name.lower()
            )),)

        _fields.append(search.TextField(name="full_name_rev", value=Customer.tokenize1(
            model.last_name.lower()+" "+model.first_name.lower()
            )),)

        # _fields.append(search.TextField(name="telephone", value=Customer.tokenize1(
        #     model.telephone.lower()
        #     )),)
        # _fields.append(search.TextField(name="email", value=Customer.tokenize1(
        #     model.email.lower()
        #     )),)

        document = search.Document(  # create new document with doc_id=key.urlsafe()
            doc_id=key.urlsafe(),
            fields=_fields)
        index = search.Index(name=cls._get_kind()+"Index")  # not in try-except: defer will catch and retry.
        index.put(document)

@staticmethod
def tokenize1(string):
    s = ""
    for i in range(len(string)):
        if i > 0:
            s = s + " " + string[0:i+1]
        else:
            s = string[0:i+1]
    return s

这是搜索代码：

@staticmethod
def search(ndb_model, query_phrase):
    # TODO: search returns a limited number of results(20 by default)
    # (See Search Results at https://cloud.google.com/appengine/docs/python/search/#Python_Overview)
    sort1 = search.SortExpression(expression='sort1', direction=search.SortExpression.ASCENDING,
                                  default_value="")
    sort2 = search.SortExpression(expression='sort2', direction=search.SortExpression.ASCENDING,
                                  default_value="")
    sort_opt = search.SortOptions(expressions=[sort1, sort2])
    results = search.Index(name=ndb_model._get_kind() + "Index").search(
        search.Query(
            query_string=query_phrase,
            options=search.QueryOptions(
                sort_options=sort_opt
            )
        )
    )

    print "----------------"
    res_list = []
    for r in results:
        obj = ndb.Key(urlsafe=r.doc_id).get()
        print obj.first_name + " "+obj.last_name
        res_list.append(obj)
    return res_list

Did anyone else had my same experience? If so, how have you solved it?

非常感谢你们，Marco Galassi

编辑：名字，电子邮件，电话显然是完全发明的 . Edit2 ：我现在已经转移到看起来快一点的TextField，但问题仍然存在