refactored view package

internal/db/getbyfield.go

@@ -8,39 +8,27 @@ import (
 	"github.com/uptrace/bun"
 )
 
-type ListFilter struct {
-	filters []Filter
-}
-
-func NewListFilter() *ListFilter {
-	return &ListFilter{[]Filter{}}
-}
-
-func (f *ListFilter) Add(field string, value any) {
-	f.filters = append(f.filters, Filter{field, value})
-}
-
 type fieldgetter[T any] struct {
 	q     *bun.SelectQuery
 	field string
 	value any
+	model *T
 }
 
 func (g *fieldgetter[T]) get(ctx context.Context) (*T, error) {
 	if g.field == "id" && (g.value).(int) < 1 {
 		return nil, errors.New("invalid id")
 	}
-	model := new(T)
 	err := g.q.
 		Where("? = ?", bun.Ident(g.field), g.value).
-		Scan(ctx, model)
+		Scan(ctx)
 	if err != nil {
 		if errors.Is(err, sql.ErrNoRows) {
 			return nil, nil
 		}
 		return nil, errors.Wrap(err, "bun.SelectQuery.Scan")
 	}
-	return model, nil
+	return g.model, nil
 }
 
 func (g *fieldgetter[T]) GetFirst(ctx context.Context) (*T, error) {
@@ -68,10 +56,12 @@ func GetByField[T any](
 	field string,
 	value any,
 ) *fieldgetter[T] {
+	model := new(T)
 	return &fieldgetter[T]{
-		tx.NewSelect().Model((*T)(nil)),
+		tx.NewSelect().Model(model),
 		field,
 		value,
+		model,
 	}
 }