Be more tolerant wrt errors

... fallback to default imp.

Author: helje5

Sources/DirectToSwiftUI/ViewModel/D2SDisplayGroup.swift

@@ -317,7 +317,13 @@ fileprivate func buildInitialFetchSpec<Object: ActiveRecordType>
  if (fs.sortOrderings?.count ?? 0) == 0 {
  fs.sortOrderings = dataSource.entity?.d2s.defaultSortOrderings ?? []
  }
- assert(fs.sortOrderings != nil && !(fs.sortOrderings?.isEmpty ?? true))
+ #if os(macOS)
+ if !(fs.sortOrderings != nil && !(fs.sortOrderings?.isEmpty ?? true)) {
+ globalD2SLogger.error("got no sort orderings for fetchspec:", fs)
+ }
+ #else
+ assert(fs.sortOrderings != nil && !(fs.sortOrderings?.isEmpty ?? true))
+ #endif
 
  if let aux = auxiliaryQualifier {
  fs.qualifier = aux.and(fs.qualifier)

Sources/DirectToSwiftUI/Views/BasicLook/PageWrapper/EntityMasterDetailPage.swift

@@ -23,7 +23,13 @@ public extension BasicLook.PageWrapper.MasterDetail {
  private var selectedEntity: Entity? {
  guard let entityName = selectedEntityName else { return nil }
  guard let entity = model[entity: entityName] else {
- fatalError("did not find entity: \(entityName) in \(model)")
+ #if os(macOS)
+ globalD2SLogger.error("did not find entity:", entityName,
+ "in:", model)
+ return nil
+ #else
+ fatalError("did not find entity: \(entityName) in \(model)")
+ #endif
  }
  return entity
  }
@@ -71,7 +77,8 @@ public extension BasicLook.PageWrapper.MasterDetail {
  }
  else {
  EntityContent()
- .environment(\.entity, selectedEntity!)
+ .environment(\.entity,
+ selectedEntity ?? D2SKeys.entity.defaultValue)
  }
  }
  .frame(minWidth: 400 as CGFloat, idealWidth: 600 as CGFloat,

Sources/DirectToSwiftUI/Views/BasicLook/PageWrapper/EntitySidebar.swift

@@ -68,7 +68,9 @@ public extension BasicLook.PageWrapper.MasterDetail.EntityMasterDetailPage {
  EntityName()
  Spacer()
  }
- .environment(\.entity, { self.model[entity: name]! }())
+ .environment(\.entity, {
+ self.model[entity: name] ?? D2SKeys.entity.defaultValue
+ }())
  .frame(maxWidth: .infinity, maxHeight: .infinity)
  .foregroundColor(self.colorForEntityName(name))
  .onTapGesture {