mongodb 查找输入的模式 [英] mongodb find a pattern of an input

问题描述

我需要找到以特定输入开头的所有结果，例如输入:Paul"、pau"、paul Gr"、Paul Green"、Paul Gree"、Pel"、pele""、"joh"、"john" 等.搜索必须区分大小写.它假设返回所有这些(输入的搜索字符串长度至少为 3 个字符):

<预><代码>[{"_id": ObjectId("5e6ffe413f71835ae3aa4b60"),"f": "保罗",身份证":11811，"l": "贝莱",r":64},{"_id": ObjectId("5e6ffe413f71835ae3aa4b65"),"f": "保罗",身份证":11811，"l": "步行者",r":64},{"_id": ObjectId("5e6ffe413f71835ae3aa4b66"),"f": "约翰尼",身份证":11811，"l": "绿色",r":64}]

尝试执行以下操作:

 contains_searched_term_players = list(db.players_collection.find({'$or': [{'f': {'$regex': searched_player_name_string, '$options': 'i'}},{'l': {'$regex': searched_player_name_string, '$options': 'i'}},{'c': {'$regex': searched_player_name_string, '$options': 'i'}}]}).sort([{'r', -1}])

但它不适用于保罗格林"

searched_player_name_string 是给定的输入(上面的输入，例如 Paul Green)

解决方案

您需要为查询条件提供正确的Regex

^(Paul Green|Paul Gree|Paul|paul|pau|Gr|pele|Pel|john|joh)

RegexPlayground

searched_player_name_string = "^(Paul Green|Paul Gree|Paul|paul|pau|Gr|pele|Pel|john|joh)"result_cursor = db.players_collection.find({$或":[{F": {"$regex": searched_player_name_string,"$options": "i"}},{我":{"$regex": searched_player_name_string,"$options": "i"}},{C": {"$regex": searched_player_name_string,"$options": "i"}}]})searched_player_name_string = 列表(result_cursor)

MongoPlayground

I need to find all the results that start with certain input for example for the inputs: "Paul", "pau", "paul Gr", "Paul Green", "Paul Gree" , "Pel", "pele", "joh","john" etc.. The search has to be case insensive.. it suppose to return all of these(the input search string is at least 3 characters long):

[
  {
    "_id": ObjectId("5e6ffe413f71835ae3aa4b60"),
    "f": "Paul",
    "id": 11811,
    "l": "Pelè",
    "r": 64
  },
  {
    "_id": ObjectId("5e6ffe413f71835ae3aa4b65"),
    "f": "paul",
    "id": 11811,
    "l": "walker",
    "r": 64
  },
  {
    "_id": ObjectId("5e6ffe413f71835ae3aa4b66"),
    "f": "johnny",
    "id": 11811,
    "l": "Green",
    "r": 64
  }
]

tried to do the following:

 contain_searched_term_players = list(db.players_collection.find({'$or': [{'f': {'$regex': searched_player_name_string, '$options': 'i'}},
                                                                         {'l': {'$regex': searched_player_name_string, '$options': 'i'}},
                                                                         {'c': {'$regex': searched_player_name_string, '$options': 'i'}}]}).sort([{'r', -1}])

but it doesnt work for "Paul Green"

searched_player_name_string is the given input(the inputs above, for example Paul Green)

解决方案

You need to provide correct Regex for query condition

^(Paul Green|Paul Gree|Paul|paul|pau|Gr|pele|Pel|john|joh)

RegexPlayground

searched_player_name_string = "^(Paul Green|Paul Gree|Paul|paul|pau|Gr|pele|Pel|john|joh)"
result_cursor = db.players_collection.find({
  "$or": [
    {
      "f": {
        "$regex": searched_player_name_string,
        "$options": "i"
      }
    },
    {
      "l": {
        "$regex": searched_player_name_string,
        "$options": "i"
      }
    },
    {
      "c": {
        "$regex": searched_player_name_string,
        "$options": "i"
      }
    }
  ]
})
searched_player_name_string = list(result_cursor)

MongoPlayground

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