#100: Fix for showing dashboard when no tags exist

Author: r-win

src/FaceIT.Hangfire.Tags.Mongo/FaceIT.Hangfire.Tags.Mongo.csproj

@@ -5,7 +5,7 @@
         <GeneratePackageOnBuild>false</GeneratePackageOnBuild>
         <Authors>Erwin Bovendeur</Authors>
         <Company>2Face-IT B.V.</Company>
-        <Version>1.9.0</Version>
+        <Version>1.9.1</Version>
         <Description>Support for MongoDB for Hangfire.Tags. This separate library is required in order to search for tags, and proper cleanup.</Description>
         <Copyright />
         <PackageProjectUrl>https://github.com/face-it/Hangfire.Tags</PackageProjectUrl>

src/FaceIT.Hangfire.Tags.Mongo/MongoTagsServiceStorage.cs

@@ -66,7 +66,7 @@ public override IEnumerable<TagDto> SearchWeightedTags(JobStorage jobStorage, st
             var mainQuery = monitoringApi.DbContext.Database.GetCollection<BsonDocument>($"{_options.Prefix}.jobGraph").Aggregate()
                 .Match(filterBson).As<SetDto>();
 
-            var total = mainQuery.Count().Single().Count;
+            var total = mainQuery.Count().SingleOrDefault()?.Count ?? 0;
             var grp = mainQuery.Group(x => x.Value,
                 x => new TagDto
                 {
@@ -166,7 +166,7 @@ private static DateTime GetStateDate(SafeDictionary<string, string> stateData, s
         private int GetJobCount(HangfireDbContext context, string[] tags, string stateName)
         {
             var qry = CreateBaseQuery(context, tags, stateName);
-            return (int) qry.Count().Single().Count;
+            return (int) (qry.Count().SingleOrDefault()?.Count ?? 0);
         }
 
         private JobList<TDto> GetJobs<TDto>(
@@ -322,7 +322,7 @@ public override long GetTagCount(JobStorage jobStorage, string setKey = "tags")
             var mainQuery = monitoringApi.DbContext.Database.GetCollection<BsonDocument>($"{_options.Prefix}.jobGraph").Aggregate()
                 .Match(filterBson).As<SetDto>();
 
-            return mainQuery.Count().Single().Count;
+            return mainQuery.Count().SingleOrDefault()?.Count ?? 0;
         }
 
         public override string[] GetTags(JobStorage jobStorage, string jobId)