我在mongodb
示例
{
"SchemaName": "Intelligence",
"SchemaDescription": "WindPower",
"SchemaType": "WindPower",
"SchemaTypeId": 1,
"SchemaData": {
"ProjectId": 1,
"LastUpdated": "2016-07-02T19:27:28.000+0000",
"ProjectName": "Zhonghuashan II",
"Capacity": 49.0,
"Technology": "Onshore",
"Country":{
"CountryId":1,
"CountryName":"UnitedKingdom",
"CountryCode":"UK"
}
}
}
现在我根据搜索条件过滤数据
var filter = Builders<Schema>.Filter.Or(
Builders<Schema>.Filter.Where(p => p.SchemaData.ProjectName.ToLower().Contains(searchCriteria.ProjectName.ToLower())),
Builders<Schema>.Filter.Where(p => p.SchemaData.Technology.ToLower().Contains(searchCriteria.Technology.ToLower())),
Builders<Schema>.Filter.Where(p => p.SchemaData.Country.CountryName.ToLower().Contains(searchCriteria.Country.ToLower()))
);
var list = await collectionHandler.ReadOnly<Schema>().FindSync(filter).ToListAsync();
return list;
我需要添加条件
searchCriteria.ProjectName ="" || searchCriteria.Technology="" || searchCriteria.Country = "" = return all records
searchCriteria.ProjectName ="abc" and searchCriteria.Technology="xyz" || searchCriteria.Country = "" = return matched records
searchCriteria.ProjectName ="abc" and searchCriteria.Technology="xyz" and searchCriteria.Country = "pqr" = return matched records
searchCriteria.ProjectName ="" || searchCriteria.Technology="xyz" and searchCriteria.Country = "pqr" = return matched records
searchCriteria.Technology="" ="abc" || searchCriteria.Technology="xyz" and searchCriteria.Country = "pqr" = return matched records
表示搜索条件的任何属性都可以与搜索条件的其他属性组合和/或与之结合
答案 0 :(得分:0)
对我来说,我很乐意将过滤器直接传递为字符串:
FilterDefinition<BsonDocument> filter = @"{ ""Prop"": { $Or: [{ $and: [...] },{ $and: [...] }] } }";
var lst = collection.Find(filter);
您可以查看文档:
https://docs.mongodb.com/v3.2/reference/operator/query/or/
答案 1 :(得分:0)
我是这样做的:
将此答案作为here上的答案
var idFilter = new BsonDocument { { "_id", new BsonDocument { { "$regex", codeRegex }, { "$options", "i" } } } };
var nameFilter = new BsonDocument { { "Name", new BsonDocument { { "$regex", codeRegex }, { "$options", "i" } } } };
var filter = new BsonDocument("$or", new BsonArray { idFilter, nameFilter });
var query = _collection.Find(filter)
.SortBy(c=>c.Id);
return query.ToList();