Elastic search using NEST with multiple parameters

Question

I have an sql table with columns Name, Category, Location. I am using Elastic Search with NEST. my query like this:

var result = client.Search<Models.Search.Poll>(s => s.Query(q => q.Fuzzy(f => f.OnField(p => p.Name).Value(query))))));

So if there is a record with name = "We are here" and user search "are" , it returns result.

Now I need to add two more parameters category and location to this query:

so I made it like this:

var result = client.Search<Models.Search.Poll>(s => s.Query(q => q.Fuzzy(f => f.OnField(p => p.Name).Value(query).OnField(r => r.Category).Value(category))));

but it is not working with query field now. but it works with category now. here is what I get when I type name but dont select category:

StatusCode: OK, 
    Method: POST, 
    Url: http://server.abc.com:9200/pollit-dev/polls/_search, 
    Request: {
  "query": {
    "fuzzy": {
      "category": {
        "value": "Select a Category"
      }
    }
  }
}, 
    Response: {"took":2892,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":0,"max_score":null,"hits":[]}}

I tried this one well:

var result = client.Search<Models.Search.Poll>(s => s.MatchAll().Query(q => q.Term(p => p.Name, query) || q.Term(p => p.Category,category) || q.Term(p => p.Location, Location)

but no luck so far.

Regards, Asif Hameed

danvasiloiu · Accepted Answer · 2015-02-02 09:46:12Z

1

You have multiple options for that. First one is almost like yours but you have to use a Bool condition there.

var result = client.Search<Models.Search.Poll>(s => s
      .MatchAll()
      .Query(q => q
         .Bool(b => b
           .Must(m => m.Term(p => p.Name, query) || m.Term(p => p.Category,category) || m.Term(p => p.Location, Location))
         )
       )
   );

Now another option is to use queryContainers. Something like this:

var result = _Instance.Search<Models.Search.Poll>(q => q
                .Query(qq =>
                {
                    QueryContainer termQuery = null;
                    QueryContainer locationQuery = null;
                    QueryContainer categoryQuery = null;

                    termQuery = qq.Term(p => p.Name, query);
                    categoryQuery = qq.Term(p => p.Category,category);
                    locationQuery = qq.Term(p => p.Location, Location);

                    return termQuery || categoryQuery || locationQuery;
                    })
           );

You can also elaborate the QueryContainers and add multiple search parameters there. Hope this helps you. Great day!

answered Feb 2, 2015 at 9:46

danvasiloiu

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1 Comment

Marcus Over a year ago

This only works if there is at least one exact match if I am right.

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