internal/code: Unalias element of pointer (#3250)

* codegen: Revert Unalias before lookup type (#3247)

This reverts commit 4c4be0a.

* code: `Unalias` element of pointer

* chore: added comment

codegen/templates/import.go

@@ -116,7 +116,7 @@ func (s *Imports) Lookup(path string) string {
 }
 
 func (s *Imports) LookupType(t types.Type) string {
-	return types.TypeString(code.Unalias(t), func(i *types.Package) string {
+	return types.TypeString(t, func(i *types.Package) string {
 		return s.Lookup(i.Path())
 	})
 }

internal/code/alias_1.23.go

@@ -8,5 +8,12 @@ import (
 
 // Unalias unwraps an alias type
 func Unalias(t types.Type) types.Type {
+	if p, ok := t.(*types.Pointer); ok {
+		// If the type come from auto-binding,
+		// it will be a pointer to an alias type.
+		// (e.g: `type Cursor = entgql.Cursor[int]`)
+		// *ent.Cursor is the type we got from auto-binding.
+		return types.NewPointer(Unalias(p.Elem()))
+	}
 	return types.Unalias(t)
 }