code: def get(self, id=None):
          
  
          if id is None:
              path = request.args.get('path_name', default=None)
              if path is not None:
                  project = db.session.query(Project).filter_by(
                      path_name=path).first()
                  if project is None:
                      return jsonify({
                          'project': None,
                          'message': 'Project path \'%s\' is not found' % path
                      }), 400
                  return jsonify({'project': project.serialize})
  
              projects = db.session.query(Project).all()
              return jsonify({
                  'projects': [p.serialize for p in projects]
              })
  
          else:
              project = db.session.query(Project).filter_by(id=id).first()
              if project is None:
                  return jsonify({
                      'project': None,
                      'message': 'No interface defined for URL.'
                  }), 404
              return jsonify({
                  'project': project.serialize
              })
docs: get.