feat: update admin

backend/app/models/posts.go

@@ -395,3 +395,21 @@ func (m *postsModel) GetMediaByIds(ctx context.Context, ids []int64) ([]model.Me
 
 	return medias, nil
 }
+
+// Count
+func (m *postsModel) Count(ctx context.Context, cond BoolExpression) (int64, error) {
+	tbl := table.Posts
+	stmt := tbl.
+		SELECT(COUNT(tbl.ID).AS("count")).
+		WHERE(cond)
+
+	var count struct {
+		Count int64
+	}
+	if err := stmt.QueryContext(ctx, db, &count); err != nil {
+		m.log.Errorf("error counting posts: %v", err)
+		return 0, err
+	}
+
+	return count.Count, nil
+}