Adding a ObjectGraphType for a ContentPart that has ContentField(s) causes a "field already added" exception

[kadamgreene]

I created a ContentPart and added 2 DateTimeFields to it. Because it has other, non-field properties, I created a ObjectGraphType<SchedulePart>. But during the building of the Schema, it first adds my ObjectGraphType (via TypedContentTypeBuilder) and names it schedule (via ToFieldName extension method). But every place where it checks to see if a field already exists, it does this:

if (contentItemType.HasField(partName)) continue;

which will look for SchedulePart not schedule. This especially happens in DynamicContentTypeBuilder where the exception happens.

I think the code should be:

if (contentItemType.HasField(partName.ToFieldName())) continue;

Wherever it is doing the check for existing fields.

[jtkech]

Looks good, could you open a new PR to fix it so that a graphQL expert can review it