cloud.ml.prediction.prediction_utils.PredictionError: Failed to run the provided model: Exception during running the graph: Cannot feed value of shape (1, 1) for Tensor 'input_tensors:0', which has shape '(?,)' (Error code: 2)
当我迭代组时，它返回可预测的结果。
person.groups.add(group1)#->I want to get this as first
person.groups.add(group2)
person.groups.add(group3)
当我在m2m字段上使用.first（）时，它将返回不可预测的结果。
当我使用索引[0]时，它将返回可预测的结果。
for group in person.groups.all():
#->group1 comes first etc...
这是什么原因？