Submit SqlQuery to Azure DocumentDB Attribute Function
I have an Azure Function that uses an attribute DocumentDB
to connect to a Cosmos database. I am using Azure Tools for Visual Studio 2017. Here is a simple function
[FunctionName("DocumentDbGet")]
public static HttpResponseMessage Run([HttpTrigger(AuthorizationLevel.Function, "get")]HttpRequestMessage req, TraceWriter log,
[DocumentDB("FunctionJunctionDemo", "Demo")]IEnumerable<DemoModel> items)
{
//Can perform operations on the "items" variable, which will be the result of the table/collection you specify
string name = req.GetQueryNameValuePairs()
.FirstOrDefault(q => string.Compare(q.Key, "name", true) == 0)
.Value;
var item = items.Where(x => x.FirstName == name);
return req.CreateResponse(HttpStatusCode.OK);
}
I want to pass SqlQuery
as one of the attribute parameters DocumentDB
, for example:
[FunctionName("DocumentDbGet")]
public static HttpResponseMessage Run([HttpTrigger(AuthorizationLevel.Function, "get")]HttpRequestMessage req, TraceWriter log,
[DocumentDB("FunctionJunctionDemo", "Demo", SqlQuery = $"select * from c where c.Id = {Id}")]IEnumerable<DemoModel> items)
{
//Can perform operations on the "items" variable, which will be the result of the table/collection you specify
string name = req.GetQueryNameValuePairs()
.FirstOrDefault(q => string.Compare(q.Key, "name", true) == 0)
.Value;
var item = items.Where(x => x.FirstName == name);
return req.CreateResponse(HttpStatusCode.OK);
}
I've only seen one example and reported that it supposedly works. https://github.com/Azure/Azure-Functions/issues/271 The
"error" I receive does not recognize anything with a name SqlQuery
as a possible parameter.
I have looked at the documentation for Azure function input bindings
https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-documentdb#input-sample-with-multiple-documents which shows the result in a file function.json
. containing the attribute SqlQuery
. How did it happen?
If it is not possible to pass an attribute to SqlQuery DocumentDB
, what would be the best way to filter the results before not returning the entire collection and then run it through a LINQ query?
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You need to specify the 1.1.0-beta
version of the Microsoft.Azure.WebJobs.Extensions.DocumentDB
NuGet package (or later).
In this version, SqlQuery
is a valid attribute parameter DocumentDB
. You compile the code for me if I remove the sign $
in front of the line select
:
[DocumentDB("FunctionJunctionDemo", "Demo", SqlQuery = "select * from c where c.Id = {Id}")]
You don't need to $
- it is used for string interpolation in C #, not what you want to do here.
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