問題描述
我正在使用 elasticsearch python 客戶端 對 elasticsearch 實例進行一些查詢我們正在托管.
I am using the elasticsearch python client to make some queries to the elasticsearch instance that we are hosting.
我注意到有些字符需要轉義.具體來說，這些...
I noticed that some characters need to be escaped. Specifically, these...
+ - && || ! ( ) { } [ ] ^ " ~ * ? :
除了我已經想到的之外，有沒有一種干凈的方法可以做到這一點?當然有比做更清潔的方法
Is there a clean way to do this beyond what I've already got in mind? Surely there is a cleaner way than doing
term
.replace("+", "+")
.replace("-", "-")
# ....etc
我希望有一個我可以使用的 API 調用，但我在文檔中找不到.這似乎是一個很常見的問題，應該由某人解決.
I was hoping there was an API call that I could use, but I can't find one in the docs. This seems like a common enough issue that it should have been solved by someone.
有人知道正確"的做法嗎?
Does anyone know the "correct" way of doing this?
我仍然不確定是否有 API 調用，但我得到的東西足夠簡潔，足以讓我滿意.
EDIT : I am still not sure if there is an API call, but I got things concise enough to where I am happy.
def needs_escaping(character):
escape_chars = {
'\' : True, '+' : True, '-' : True, '!' : True,
'(' : True, ')' : True, ':' : True, '^' : True,
'[' : True, ']': True, '"' : True, '{' : True,
'}' : True, '~' : True, '*' : True, '?' : True,
'|' : True, '&' : True, '/' : True
}
return escape_chars.get(character, False)
sanitized = ''
for character in query:
if needs_escaping(character):
sanitized += '\%s' % character
else:
sanitized += character
推薦答案
是的，您需要在 query_string 查詢.為此(假設您使用的是 PyLucene)，您應該能夠使用 QueryParserBase.escape(String).
Yes, those characters will need to be replaced within content you want to search in a query_string query. To do that (assuming you are using PyLucene), you should be able to use QueryParserBase.escape(String).
除此之外，您始終可以根據您的需要調整 QueryParserBase.escape 源代碼:
Barring that, you could always adapt the QueryParserBase.escape source code to your needs:
public static String escape(String s) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
// These characters are part of the query syntax and must be escaped
if (c == '\' || c == '+' || c == '-' || c == '!' || c == '(' || c == ')' || c == ':'
|| c == '^' || c == '[' || c == ']' || c == '"' || c == '{' || c == '}' || c == '~'
|| c == '*' || c == '?' || c == '|' || c == '&' || c == '/') {
sb.append('\');
}
sb.append(c);
}
return sb.toString();
}
這篇關于在elasticsearch中轉義特殊字符的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！