Add datalink original row #559
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msdemlei
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bsipocz
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Jun 28, 2024
docs/dal/index.rst
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| obscore or SIAP service, where the media type is | ||
| application/x-votable;content=datalink –, one can build a | ||
| DatalinkResults using | ||
| :py:meth:`~pyvo.adhoc.DatalinkResults.from_result_url`: |
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This is not the correct namespace, thus the sphinx error.
Suggested change
| :py:meth:`~pyvo.adhoc.DatalinkResults.from_result_url`: | |
| :py:meth:`~pyvo.dal.adhoc.DatalinkResults.from_result_url`: |
bsipocz
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Jun 28, 2024
docs/dal/index.rst
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| .. doctest-remote-data:: | ||
| >>> rows = vo.dal.TAPService("http://dc.g-vo.org/tap" | ||
| ... ).run_sync("select top 5 * from califadr3.cubes order by califaid") | ||
| >>> for dl in rows.iter_datalinks(): |
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This example runs into the DALFormattingError, that is very similar to #361, thus it fails the test.
(Technically it's a warning, so we can deal with it if necessary, but it would be nicer to fix it instead, if possible)
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Sorry for another force-push, and one that reverses the history on top. On the other hand, this has now a passing and reasonably fast docs/dal/index.rst. So... if the CI passes, could you have another look, @bsipocz? |
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On Thu, Jun 27, 2024 at 06:26:49PM -0700, Brigitta Sipőcz wrote:
This example runs into the `DALFormattingError`, that is very similar to #361, thus it fails the test.
(Technically it's a warning, so we can deal with it if necessary, but it would be nicer to fix it instead, if possible)
Oh, I forgot to comment on this: I've put an IGNORE_WARNINGS there
now, because while Tom has promised to do the astropy fix RSN, it
will still be a while until the fix will arrive in our test
systems, let alone in Debian, which is where my doctests run...
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msdemlei
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pyvo/dal/adhoc.py
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| res = super(DatalinkResults, cls).from_result_url( | ||
| result_url, session=session) |
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can be written in one line, maybe more readable that way
Suggested change
| res = super(DatalinkResults, cls).from_result_url( | |
| result_url, session=session) | |
| res = super().from_result_url(result_url, session=session) |
| @@ -597,7 +619,7 @@ def clone_byid(self, id): | |||
| for x in copy_tb.resources: | |||
| if x.ID and x.ID not in referenced_serviced: | |||
| copy_tb.resources.remove(x) | |||
| return DatalinkResults(copy_tb) | |||
| return DatalinkResults(copy_tb, original_row=original_row) | |||
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shouldn't original row be a copy as well, from whatever is already set in the class, in self.original_row?
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On Mon, Jul 01, 2024 at 04:44:32PM -0700, Brigitta Sipőcz wrote:
@bsipocz commented on this pull request.
Minor comments only, except that `original_row=None` doesn't feel
right in `clone_byid` as a default, shouldn't that be a copy as
well from the object?
No, I'm pretty sure we should not copy original_row despite the
"clone" in the name. The reason is that clone_byid is passed an id;
in other words, in all likelihood the new DatalinkResults will
corresond to a different "thing", and hence, if there was an original
row, to a different original row.
Now, I am fairly adamant that it is more important to avoid wrong
data than to have some additional possibly correct data (see also
the Zen of Python: "In the face of ambiguity, refuse the temptation
to guess"). So, for reasons of defensive programming, I think I'll
stubbornly insist on None here.
> + def __init__(self, *args, **kwargs):
+ self.original_row = kwargs.pop("original_row", None)
+ super().__init__(*args, **kwargs)
I don't think this is necessary as you already do the same in the
`DatalinkResultsMixin` base class.
Ummm... sorry, I don't follow here: Are you referring to the __init__
method? But the Mixin doesn't have a constructor (as I, frankly,
would expect from a Mixin)? The upcall goes to DALResults, and that
won't touch original_row.
Am I missing something fundamental?
> +.. doctest::
+
No need for this, everything with `>>>` are picked up as doctest
Hmyeah... can we still keep it to make things simpler for my
zero-tooling doctest profiler? [cf. my plea in #567]
> + res = super(DatalinkResults, cls).from_result_url(
+ result_url, session=session)
can be written in one line, maybe more readable that way
```suggestion
res = super().from_result_url(result_url, session=session)
```
Shiver my timbers. I indeed had not realised that the argument-less
super is smart enough to even work in a class method, but it
apparently does. Wow. One of these days I'll try and understand how
it does that :-)
Anyway: changed in commit 5360cff.
> @@ -597,7 +619,7 @@ def clone_byid(self, id):
for x in copy_tb.resources:
if x.ID and x.ID not in referenced_serviced:
copy_tb.resources.remove(x)
- return DatalinkResults(copy_tb)
+ return DatalinkResults(copy_tb, original_row=original_row)
shouldn't original row be a copy as well, from whatever is already
set in the class, in `self.original_row`?
First off, it is my conviction that the wider vicinity of that
code needs a thorough review anyway and do (a lot) *less* copying (I
have bug #537 to prove it).
Your point, however, is a good observation: Do we want to comment on
what's supposed to happen if someone changes original_row (regardless
of whether it comes in through clone_byid or through some other
means)?
Me... well, I can't think of a case where it would actually be useful
if datalink client code modifies the table the datalinks come from.
On the other hand, I don't think I want to copy (or materialise) all
these rows just in case. So, in commit 5360cff I have added a bit
of language to the docs to the effect that you're not supposed to
rely on any behaviour when you muck around with original_row.
Thanks for the review!
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Using this opportunity to speed up the doctest by using smaller/faster services. It's now running in 10 seconds on my box in my neck of the net, which sounds a lot more reasonable than what was there before.
It also does some minor improvements to the documentation of how to use datalink. But that part could really use a lot more love...
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my bad about the |
bsipocz
approved these changes
Jul 2, 2024
|
Thanks @msdemlei! |
andamian
reviewed
Jul 2, 2024
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| .. remove skip once https://github.com/astropy/pyvo/issues/361 is fixed | ||
| .. doctest-skip:: | ||
| Datalink lets operators associate multiple artefacts with a dataset. |
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This is an attempt to fix bug #542. It's not particularly pretty, but I don't think becoming much cleverer here is worth it.
I'm marking this as a draft while I'm still working out whether we should pass around a few extra original_row-s.