WebAPI provides a similar functionality to an array in JavaScript through the use of IQueryable

I have a WebAPI method that returns an IQueryable of a 'complex' object in the following format:

[Route("api/INV_API/deptSelect")]
public IQueryable<DEPTNAME_DESCR> GetDistinctDeptSelect([FromUri] string q)
{
        if (q != null)
        {
                         var query = (from d in db.DEPTs
                         where d.DESCR.Contains(q) || d.DEPTNAME.Contains(q)
                         select new DEPTNAME_DESCR { DEPTNAME = d.DEPTNAME, DESCR = d.DESCR }).Distinct();


            return query;

        }
        else
        {
            var query = (from d in db.DEPTs
                         select new DEPTNAME_DESCR { DEPTNAME = d.DEPTNAME, DESCR = d.DESCR }).Distinct();


            return query;
        }
}

When I use AJAX to make a GET request to this method, I receive a JavaScript array response like this:

https://i.sstatic.net/h17EA.png

In another WebAPI method, I am attempting to return an IQueryable<string> from what was originally a List of strings:

[HttpGet]
[Route("api/INV_API/requesterIdSelect2")]
public IQueryable<string> GetListOfUserId([FromUri] string q)
{
   var result = db.Database.SqlQuery<string>("SelectUSERIDFromSM @searchterm", new SqlParameter("@searchterm", q)).ToList();

        return result.AsQueryable<string>();
}

However, when I inspect the response from the AJAX GET request, it appears like this: https://i.sstatic.net/UeF1B.png

I'm trying to figure out what went wrong with the second method. Do I need to serialize the data I'm returning? Or is there something incorrect with my SQL query itself?

I can provide more details if needed.

Answer №1

Make sure to update your code method as follows:

[HttpGet]
[Route("api/INV_API/requesterIdSelect2")]
public IEnumerable<string> RetrieveListOfUserId([FromUri] string searchTerm)
{
   var outcome = db.Database.SqlQuery<string>("SelectUSERIDFromSM @searchterm", new SqlParameter("@searchterm", searchTerm)).ToList();

        return outcome;
}

An IQueryable represents a stored query, not the actual results returned by the query. To execute the query, you must use methods like ToList or Distinct, similar to what is included in your initial code snippet.

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