[Bug]: TimeSeries.get_timestamps fails for numpy array timestamps

[pauladkisson]

What happened?

I was trying to use the new convenience method on the TimeSeries class, get_timestamps, and it threw an error on my time series, which use numpy arrays for timestamps.

Steps to Reproduce

time_series = mock_TimeSeries(data=[1, 2, 3], timestamps=np.array([3, 4, 5]), rate=None)
assert_array_equal(time_series.get_timestamps(), [3, 4, 5])

Traceback

def get_timestamps(self):
        """
        Get the timestamps of this TimeSeries. If timestamps are not stored in this TimeSeries, generate timestamps.
        """
>       if self.fields.get('timestamps'):
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E       ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

src/pynwb/base.py:396: ValueError

Operating System

macOS

Python Executable

Conda

Python Version

3.13

Package Versions

No response

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