Refactor blog post logic to standardize field names and improve error handling; implement pagination for post listing and add tag retrieval functionality.

app/internal/logic/deletepostlogic.go

@@ -28,7 +28,7 @@ func NewDeletePostLogic(ctx context.Context, svcCtx *svc.ServiceContext) *Delete
 func (l *DeletePostLogic) DeletePost(req *types.DeletePostReq) (resp *types.DeletePostResp, err error) {
 	// Delete post from database
 	query := `DELETE FROM posts WHERE id = $1`
-	result, err := l.svcCtx.DB.ExecContext(l.ctx, query, req.Post_id)
+	result, err := l.svcCtx.DB.ExecContext(l.ctx, query, req.PostId)
 	if err != nil {
 		l.Errorf("Failed to delete post: %v", err)
 		return nil, err
@@ -41,7 +41,7 @@ func (l *DeletePostLogic) DeletePost(req *types.DeletePostReq) (resp *types.Dele
 		return nil, err
 	}
 	if rowsAffected == 0 {
-		l.Errorf("Post not found with id: %s", req.Post_id)
+		l.Errorf("Post not found with id: %s", req.PostId)
 		return nil, fmt.Errorf("post not found")
 	}