fix: empty datasource results should be empty arrays (#778)

Author: benPearce1

octopusdeploy_framework/datasource_environments.go

@@ -69,7 +69,7 @@ func (e *environmentDataSource) Read(ctx context.Context, req datasource.ReadReq
 		return
 	}
 
-	var mappedEnvironments []schemas.EnvironmentTypeResourceModel
+	mappedEnvironments := []schemas.EnvironmentTypeResourceModel{}
 	if data.Name.IsNull() {
 		tflog.Debug(ctx, fmt.Sprintf("environments returned from API: %#v", existingEnvironments))
 		for _, environment := range existingEnvironments.Items {

octopusdeploy_framework/datasource_project_groups.go

@@ -90,7 +90,7 @@ func (p *projectGroupsDataSource) Read(ctx context.Context, req datasource.ReadR
 		return
 	}
 
-	var newGroups []schemas.ProjectGroupTypeResourceModel
+	newGroups := []schemas.ProjectGroupTypeResourceModel{}
 	for _, projectGroup := range existingProjectGroups.Items {
 		tflog.Debug(ctx, "loaded group "+projectGroup.Name)
 		var g schemas.ProjectGroupTypeResourceModel

octopusdeploy_framework/datasource_spaces.go

@@ -62,7 +62,7 @@ func (b *spacesDataSource) Read(ctx context.Context, req datasource.ReadRequest,
 		return
 	}
 
-	var mappedSpaces []schemas.SpaceModel
+	mappedSpaces := []schemas.SpaceModel{}
 	for _, space := range existingSpaces.Items {
 		var s schemas.SpaceModel
 		mapSpaceToState(ctx, &s, space)

octopusdeploy_framework/datasource_tag_sets.go

@@ -60,15 +60,16 @@ func (t *tagSetsDataSource) Read(ctx context.Context, req datasource.ReadRequest
 
 	util.DatasourceResultCount(ctx, "tag sets", len(existingTagSets.Items))
 
-	data.TagSets = flattenTagSets(existingTagSets.Items)
+	data.TagSets = flattenTagSets(ctx, existingTagSets.Items)
 	data.ID = types.StringValue(fmt.Sprintf("TagSets-%s", time.Now().UTC().String()))
 
 	resp.Diagnostics.Append(resp.State.Set(ctx, &data)...)
 }
 
-func flattenTagSets(tagSets []*tagsets.TagSet) types.List {
+func flattenTagSets(ctx context.Context, tagSets []*tagsets.TagSet) types.List {
 	if len(tagSets) == 0 {
-		return types.ListNull(types.ObjectType{AttrTypes: schemas.GetTagSetAttrTypes()})
+		emptyList, _ := types.ListValueFrom(ctx, types.ObjectType{AttrTypes: schemas.GetTagSetAttrTypes()}, tagSets)
+		return emptyList
 	}
 
 	tfList := make([]attr.Value, len(tagSets))