Re: Allowing validation to pass for partial post values?

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Hi Iain,

If what you want is to do is conditionally require some values then what
you are looking for is RequireIfMissing/RequireIfPresent which you put in
the chained_validators for the Schema:
http://www.formencode.org/en/latest/modules/validators.html#formencode.validators.RequireIfMissing


Note that it won't block other validation errors, so if you have an Int
validator and get a string, that validator will still give you an error
even if it will ultimately be ignored.

If that is a concern you can do a pre_validator that modifies / replaces
the value dict such that it includes only the values that should be kept.

-Chris

On Fri, Jul 27, 2012 at 2:39 PM, Iain Duncan <[email protected]>wrote:

> Hi, I'm using form encode for validation, and am building a ReST back end
> for use with Dojo data stores. the Dojo system wants to be able to use PUT
> requests with partial lists of params, and I'm trying to figure out best to
> do that. So if I have a schema, and some keys are missing, I want it to
> 'pass', with the values dictionary as is, rather than having the values
> dict have values for the missing keys that come from using if_missing='foo'.
>
> Is there way to do that without resorting to hackery like inspecting the
> errors and discarding all the ones that are missing value errors?
>
> thanks
> Iain
>
>
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>


-- 
Christopher Lambacher
[email protected]

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<div>Hi=C2=A0Iain,</div><div><br></div>If what you want is to do is conditi=
onally require some values then what you are looking for is RequireIfMissin=
g/RequireIfPresent which you put in the chained_validators for the Schema:<=
div>
<a href=3D"http://www.formencode.org/en/latest/modules/validators.html#form=
encode.validators.RequireIfMissing">http://www.formencode.org/en/latest/mod=
ules/validators.html#formencode.validators.RequireIfMissing</a>=C2=A0</div>=
<div>
<br></div><div>Note that it won&#39;t block other validation errors, so if =
you have an Int validator and get a string, that validator will still give =
you an error even if it will ultimately be ignored.</div><div><br></div>
<div>If that is a concern you can do a pre_validator that modifies / replac=
es the value dict such that it includes only the values that should be kept=
.</div><div><br></div><div>-Chris<br><br><div class=3D"gmail_quote">On Fri,=
 Jul 27, 2012 at 2:39 PM, Iain Duncan <span dir=3D"ltr">&lt;<a href=3D"mail=
to:[email protected]" target=3D"_blank">[email protected]</=
a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">Hi, I&#39;m using form encode for validation=
, and am building a ReST back end for use with Dojo data stores. the Dojo s=
ystem wants to be able to use PUT requests with partial lists of params, an=
d I&#39;m trying to figure out best to do that. So if I have a schema, and =
some keys are missing, I want it to &#39;pass&#39;, with the values diction=
ary as is, rather than having the values dict have values for the missing k=
eys that come from using if_missing=3D&#39;foo&#39;.<div>

<br></div><div>Is there way to do that without resorting to hackery like in=
specting the errors and discarding all the ones that are missing value erro=
rs?</div><div><br></div><div>thanks</div><span class=3D"HOEnZb"><font color=
=3D"#888888"><div>
Iain</div>
</font></span><br>---------------------------------------------------------=
---------------------<br>
Live Security Virtual Conference<br>
Exclusive live event will cover all the ways today&#39;s security and<br>
threat landscape has changed and how IT managers can respond. Discussions<b=
r>
will include endpoint security, mobile security and the latest in malware<b=
r>
threats. <a href=3D"http://www.accelacomm.com/jaw/sfrnl04242012/114/5012226=
3/" target=3D"_blank">http://www.accelacomm.com/jaw/sfrnl04242012/114/50122=
263/</a><br>_______________________________________________<br>
FormEncode-discuss mailing list<br>
<a href=3D"mailto:FormEncode-discuss-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org">FormEncode-disc=
[email protected]</a><br>
<a href=3D"https://lists.sourceforge.net/lists/listinfo/formencode-discuss"=
 target=3D"_blank">https://lists.sourceforge.net/lists/listinfo/formencode-=
discuss</a><br>
<br></blockquote></div><br><br clear=3D"all"><div><br></div>-- <br>Christop=
her Lambacher<br><a href=3D"mailto:[email protected]">chris@kateandchr=
is.net</a><br>
</div>

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Live Security Virtual Conference
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threat landscape has changed and how IT managers can respond. Discussions 
will include endpoint security, mobile security and the latest in malware 
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
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