code: def count(self, model_class, conditions=None):
          '''
          Counts the number of records in the model's table.
  
          - `model_class`: the model to count.
          - `conditions`: optional SQL conditions (contents of the WHERE clause).
          '''
          query = 'SELECT count() FROM $table'
          if conditions:
              query += ' WHERE ' + conditions
          query = self._substitute(query, model_class)
          r = self._send(query)
          return int(r.text) if r.text else f count(self, model_class, conditions=None):
          '''
          Counts the number of records in the model's table.
  
          - `model_class`: the model to count.
          - `conditions`: optional SQL conditions (contents of the WHERE clause).
          '''
          query = 'SELECT count() FROM $table'
          if conditions:
              query += ' WHERE ' + conditions
          query = self._substitute(query, model_class)
          r = self._send(query)
          return int(r.text) if r.text else 0
docs: Counts the number of records in the model's table.
  
          - `model_class`: the model to count.
          - `conditions`: optional SQL conditions (contents of the WHERE clause).