CODEWITHSUNDEEP
ravendb
K Ronning
K Ronning

Reputation: 531

RavenDB: How to query with multiple search terms

My entity is:

class Resource
{
    string Name;
    string EmployeeId;
}

How do I query for resources of multiple employees? I tried this:

Resource[] FindResourcesByEmployees(string[] employeeIds)
{
    return this.Session.Query<Resource>()
        .Where(r => employeeIds.Contains(r.EmployeeId))
        .ToArray();
}

However that gives me NotSupportedException: Method not supported: Contains. Then I tried the following method:

Resource[] FindResourcesByEmployees(string[] employeeIds)
{
    return this.Session.Query<Resource>()
        .Where(r => employeeIds.Any(v => v == r.EmployeeId))
        .ToArray();
}

That throws NotSupportedException: Expression type not supported: System.Linq.Expressions.TypedParameterException.

In SQL it would be something like:

SELECT * FROM resource WHERE employeeid IN (1, 2, 3)

My question is, how do I perform this query in RavenDB?

Upvotes: 30

Views: 5208

Answers (1)

Thomas Freudenberg
Thomas Freudenberg

Reputation: 5078

You can use the In operator. If I remember correctly your code should look like this:

using Raven.Client.Linq;

Resource[] FindResourcesByEmployees(string[] employeeIds)
{
    return this.Session.Query<Resource>()
        .Where(r => r.EmployeeId.In<string>(employeeIds)))
        .ToArray();
}

Upvotes: 65

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