A field with name 'Field' is checked against multiple values, right now am doing something as shown below:
ARRAY_CONTAINS(Field, "Value1")) OR
ARRAY_CONTAINS(Field, "Value2")) OR
ARRAY_CONTAINS(Field, "Value3"))
Instead is there a Linq query equivalent to just do something like Field.Contains("Value1", "Value2", "Value3"). If one exists, how is it written as Linq expression. Thanks!
You could use Enumerable.Intersect for the purpose.
if(sourceArray.Intersect(elementsToSearch).Any())
{
}
Where elementsToSearch to search are collection of values you want to compare against.
I'm facing some strange issue with "doc." keyword on Nest C# Elasticsearch.
I'm using Couchbase, and I have a class where one of its fields is an array of objects
I try to search inside this array for a specific value.
Something like this:
string mailFilesKey = string.Empty;
ISearchResponse<object> result = _mainManager.Client.Search<object>(c => c
.Type("MailFiles")
.Query(q =>
q.Term("SentFile_Id", fileId))
.Size(1));
Now, this thing actually works. But when I do this one, it doesn't work:
q.Term("doc.SentFile_Id", fileId))
Why?
haha ok nice one. I had this thing long time ago when i started to use Nest and elastic. If you have the object then you can use lambda expressions
like f=>f.SentFile_Id.
Now when you use a string to get the name of the field in nest you must know that all fields, index name, types in elastic are stored with lowercase first letter. So you should use this : q.Term("sentFile_Id", fileId))
Should work just fine.
I am trying to use elastic search for full text search and Spring data for integrating elastic search with my application.
For example,
There are 6 fields to be indexed.
1)firstName
2)lastName
3)title
4)location
5)industry
6)email
http://localhost:9200/test/_mapping/
I can see these fields in the mapping.
Now, I would like to make a search against these fields with a search input.
For example, When I search "mike 123", it has to search against all these 6 fields.
In Spring data repository,
The below method works to search only in firstName.
Collection<Object> findByFirstNameLike(String searchInput)
But, I would like to search against all the fields.
I tried,
Collection<Object> findByFirstNameLikeOrLastNameLikeOrTitleLikeOrLocationLikeOrIndustryLikeOrEmailLike(String searchInput,String searchInput1,String searchInput2,String searchInput3,)
Here, even the input string is same, i need to pass the same input as 6 params. Also the method name looks bigger with multiple fields.
Is there anyway to make it simple with #Query or ....
Like,
Collection<Object> findByInput(String inputString)
Also, boosting should be given for one of the field.
For example,
When i search for "mike mat", if there is any match in the firstName, that should be the first one in the result even there are exact match in the other fields.
Thanks
Lets suppose your search term is in the variable query, you can use the method search in ElasticsearchRepository.
repo.search(queryStringQuery(query))
to use queryStringQuery use the following import
import static org.elasticsearch.index.query.QueryBuilders.queryStringQuery;
I found the way to achieve this and posting here. Hope, this would help.
QueryBuilder queryBuilder = boolQuery().should(
queryString("Mike Mat").analyzeWildcard(true)
.field("firstName", 2.0f).field("lastName").field("title")
.field("location").field("industry").field("email"));
Thanks
Not a spring-data elasticsearch expert. But I see two directions you can go. The first would be to use the #Query option. That way you can create your own query. The second would be to use the example in the Filter builder section:
http://docs.spring.io/spring-data/elasticsearch/docs/current/reference/html/#elasticsearch.misc.filter
Within elasticearch you would want to use the multi_match query:
http://www.elastic.co/guide/en/elasticsearch/reference/1.5/query-dsl-multi-match-query.html
In java such a query would look like this:
QueryBuilder qb = multiMatchQuery(
"kimchy elasticsearch",
"user", "message"
);
Example coming from: http://www.elastic.co/guide/en/elasticsearch/client/java-api/current/query-dsl-queries.html#multimatch
We can write our own custom query as below.
we can specific index, routing value (this is used if alias is used)
SearchQuery searchQuery = new NativeSearchQueryBuilder().withIndices(INDEX)
.withRoute(yourQueryBuilderHelper.getRouteValue())
.withQuery(yourQueryBuilderHelper.buildQuery(yourSearchFilterRequestObject))
.withFilter(yourQueryBuilderHelper.buildFilter(yourSearchFilterRequestObject)).withTypes(TYPE)
.withSort(yourQueryBuilderHelper.buildSortCriteria(yourSearchFilterRequestObject))
.withPageable(yourQueryBuilderHelper.buildPaginationCriteria(yourSearchFilterRequestObject)).build();
FacetedPage<Ticket> searchResults = elasticsearchTemplate.queryForPage(searchQuery, YourDocumentEntity.class);
Its good to use your own queryBuilder helper which can seperate your elasticSearchService from queryBuilder responsibility.
Hope this helps
Thanks
QueryBuilder class is helpful to query from spring Dao to elastic search:
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.QueryBuilder;
QueryBuilder qb = QueryBuilders.boolQuery()
.must(QueryBuilders.termQuery("state", "KA"));
.must(QueryBuilders.termQuery("content", "test4"))
.mustNot(QueryBuilders.termQuery("content", "test2"))
.should(termQuery("content", "test3"));
.should(termQuery("content", "test3"));
Try like this, you can even set importance of the field
QueryBuilder queryBuilder = QueryBuilders.multiMatchQuery(query)
.field("name", 2.0f)
.field("email")
.field("title")
.field("jobDescription", 3.0f)
.type(MultiMatchQueryBuilder.Type.PHRASE_PREFIX);
Another way is using Query String query
Query searchQuery = new StringQuery(
"{\"query\":{\"query_string\":{\"query\":\""+ your-query-here + "\"}}}\"");
SearchHits<Product> products = elasticsearchOperations.search(
searchQuery,
Product.class,
IndexCoordinates.of(PRODUCT_INDEX_NAME));
This will search all the field from your document of specified index
Using the following query:
r.db('somedb').table('sometable')('users')
I get the following data from the result:
[
[
{
"fn": "dpw",
"u": "usertwo"
},
{
"fn": "dwd",
"u": "userone"
}
]
]
I would like to take the field "u" and specify lets say "usertwo" and get the value of "fn" for that "u". I want to have the result filtered using ReQL so that I am not just parsing the json result in nodejs as the result will be enormous eventually. What would be the best and most efficient approach. I am new to RethinkDB and would appreciate if you could explain the answer as best you can.
I'm not sure of what you exactly want, but from my understanding, this is what you are looking for:
r.db('somedb').table('sometable')('users').filter(function(user) {
return user("u").eq("usertwo")
})("fn")
You seem to have an array of array of users. if that was not a typo, the query should probably be
r.db('somedb').table('sometable')('users').nth(0).filter(function(user) {
return user("u").eq("usertwo")
})("fn")
I am using MongoTemplate for my DB operations. Now i want to fetch the maximum fields values from the selected result. Can someone guide me how i write the query so that when i pass the query to find method it will return me the desired maximum fields of document . Thanks in advance
Regards
You can find "the object with the maximum field value" in spring-data-mongodb. Mongo will optimize sort/limit combinations IF the sort field is indexed (or the #Id field). Otherwise it is still pretty good because it will use a top-k algorithm and avoid the global sort (mongodb sort doc). This is from Mkyong's example but I do the sort first and set the limit to one second.
Query query = new Query();
query.with(new Sort(Sort.Direction.DESC, "idField"));
query.limit(1);
MyObject maxObject = mongoTemplate.findOne(query, MyObject.class);