[yt-users] Derived field conflicts

[David Collins]

Hi, Nathan--

They're in a plugins file.  I like having my derived fields in one spot to
reduce confusion and improve code re-use.  The biggest problem I foresee
with using ds.add_field  is the units and validators and logs have gotten
kind of complicated, and I have a morass of scripts that instantiate
datasets in various places, so putting each add_field with each ds will be
cumbersome without making some jig to hold the parts.  Maybe that will be
straight forward.

Thanks!
d.

On Mon, Mar 13, 2017 at 5:10 PM, Nathan Goldbaum <nathan12343 at gmail.com>
wrote:

> Is this yt.add_field call happening your script or in a plugins file?
>
> If it's in a script one simple way to do it would be to replace the call
> to yt.add_field with a call to ds.add_field that's inside an if statement
> that checks to see if a needed field is in ds.field_list first.
>
> On Mon, Mar 13, 2017 at 4:05 PM, David Collins <dcollins4096 at gmail.com>
> wrote:
>
>> Hi, Everybody!
>>
>> Every now and then I'll add a new field using yt.add_field() that
>> includes the magnetic field.  If I then load another dataset that doesn't
>> have the magnetic field, it chokes when it parses the hierarchy because it
>> tries to validate my new field against the dataset that doesn't have B.  Is
>> there a simple way I can fix my field definition to prevent this?
>>
>> I'd like to avoid adding every field manually to each dataset, since I
>> have a lot of fields, and a lot of dataset, and some have B and some dont,
>> etc.  but I see that's probably the most obvious fix.
>>
>> Thanks!
>> d.
>>
>> --
>> -- Sent from a computer.
>>
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-- 
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