使用regex mongo c#在列表中查找

本文关键字:列表 查找 regex mongo 使用 | 更新日期: 2023-09-27 18:26:37

我可以用一个函数来实现这一点吗?或者用一个查询的更简短的方式来实现,而不是用那个?我正在尝试使用regex获取电子邮件,但我需要检查列表中的每封电子邮件。

public ObjectId? GetEntityIdByEmail(string email)
{
    var projection = Builders<Entity>.Projection.Include(x=>x._id);
    var filter = Builders<Entity>.Filter.Regex("Email", new BsonRegularExpression(new Regex(email, RegexOptions.IgnoreCase | RegexOptions.IgnorePatternWhitespace)));
    var id = _entitiesStorage.SelectAsSingleOrDefault(filter,projection);
    if (id == null)
        return null;
    return (ObjectId)id["_id"];
}
public List<ObjectId> GetEntitiesIdsByEmail(IList<string> emails)
{
    var result = new List<ObjectId>();
    foreach (var email in emails)
    {
        var id = GetEntityIdByEmail(email);
        if (id != null)
            result.Add(id.Value);
    }
    return result;
}

使用regex mongo c#在列表中查找

您可以扩展正则表达式查询

public async Task<List<ObjectId>> GetEntitiesIdsByEmail(IList<string> emails)
{
     var regexFilter = "(" + string.Join("|", emails) + ")";
     var projection = Builders<Entity>.Projection.Include(x => x.Id);
     var filter = Builders<Entity>.Filter.Regex("Email",
           new BsonRegularExpression(new Regex(regexFilter, RegexOptions.IgnoreCase | RegexOptions.IgnorePatternWhitespace)));
     var entities = await GetCollection().Find(filter).Project(projection).ToListAsync();
     return entities.Select(x=>x["_id"].AsObjectId).ToList();
}