How to select attribute in RavenDB Index in Json-Linq? - linq

Question

In RavenDB my document (ID = 1234) is
"datacontainer": {
"data": [
{
"#idx": "1",
"#idy": "a",
"value": {
"#text": "test 2010"
}
},
{
"#idx": "2",
"#idy": "b",
"value": {
"#text": "test 2011"
}
},
{
"#idx": "3",
"#idy": "c",
"value": {
"#text": "test 2012"
}
}
]
}
I want to create an Index, where I choose my favourite values (for example idx = "2" and idy = "b") and the output will be:
(ID, value_text) = (1234, "test 2011")
Now I can select a single element and check its value in Linq:
where p.datacontainer.data[0]["#idx"] == "2" && p.datacontainer.data[0]["#idy"] == "b"
How can I search the right element in my list?

Answer 1

Luigi,
In RavenDB, you don't search for a list value, you are searching for a document with a given document that matches the query you have.
In your case, what does your entity looks like?

Answer 2

I solved my problem! In RavenDB the index, called "MyIndex", is:
Map:
from p in docs
select new
{ Id = p.id,
M = p.dataApplication.datacontainer.data.Where(x => x["#idx"] == "2").First(x => x["#idy"] == "b").value["#text"]
};
Reduce:
from test in results
group test by new {test.Id, test.M } into g
select new { g.Key.Id, g.Key.M }
Now I can use this Index in my queries, so I will search for a document that contains a particular value, for example:
var results = from p in session.Query<QueryResult>("MyIndex")
where p.M == "test 2011"
select p;
Maybe there is a better solution, but now it works!