Re: Allowing validation to pass for partial post values?

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Hi Chris, I'm not sure if what you're suggesting is what I want. Here's a
clarification, maybe you can tell me.

The schema for my tests looks like:

class PersonValidationSchema(ValidationSchema):
    """validation schema for resource Person"""
    name_first = v.UnicodeString(not_empty=True)
    name_last = v.UnicodeString(not_empty=True)
    birthdate = IsoDate()

The names can't be empty, which is correct, because I want errors if we're
sent post values with empty strings for them. But what I need to be able to
do for Dojo is receive and *pass* a post dict that is missing a name_last
key, and get a validated dict also missing a name_last key. When that
happens, the write to the db will update only the fields that have keys in
my post vals, and ignore the others ( not setting them to none or any
default value).

Does that makes sense? Is that something I can do with what you are
suggesting?

thanks!
Iain


On Fri, Jul 27, 2012 at 1:04 PM, Chris Lambacher <[email protected]>wrote:

> 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
>>
>>
>> ------------------------------------------------------------------------------
>> Live Security Virtual Conference
>> Exclusive live event will cover all the ways today's security and
>> 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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>>
>>
>
>
> --
> Christopher Lambacher
> [email protected]
>

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Hi Chris, I&#39;m not sure if what you&#39;re suggesting is what I want. He=
re&#39;s a clarification, maybe you can tell me.<div><br></div><div>The sch=
ema for my tests looks like:</div><div><br></div><div><div>class PersonVali=
dationSchema(ValidationSchema):</div>
<div>=A0 =A0 &quot;&quot;&quot;validation schema for resource Person&quot;&=
quot;&quot;</div><div>=A0 =A0 name_first =3D v.UnicodeString(not_empty=3DTr=
ue)</div><div>=A0 =A0 name_last =3D v.UnicodeString(not_empty=3DTrue)</div>=
<div>=A0 =A0 birthdate =3D IsoDate()</div>
<div><br></div><div>The names can&#39;t be empty, which is correct, because=
 I want errors if we&#39;re sent post values with empty strings for them. B=
ut what I need to be able to do for Dojo is receive and *pass* a post dict =
that is missing a name_last key, and get a validated dict also missing a na=
me_last key. When that happens, the write to the db will update only the fi=
elds that have keys in my post vals, and ignore the others ( not setting th=
em to none or any default value).</div>
<div><br></div><div>Does that makes sense? Is that something I can do with =
what you are suggesting?</div><div><br></div><div>thanks!</div><div>Iain</d=
iv><div><br></div><br><div class=3D"gmail_quote">On Fri, Jul 27, 2012 at 1:=
04 PM, Chris Lambacher <span dir=3D"ltr">&lt;<a href=3D"mailto:chris@katean=
dchris.net" 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"><div>Hi=A0Iain,</div><div><br></div>If what =
you want is to do is conditionally require some values then what you are lo=
oking for is RequireIfMissing/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" target=3D"_blank">http://www.formencode=
.org/en/latest/modules/validators.html#formencode.validators.RequireIfMissi=
ng</a>=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"><div>
<div class=3D"h5">On Fri, Jul 27, 2012 at 2:39 PM, Iain Duncan <span dir=3D=
"ltr">&lt;<a href=3D"mailto:[email protected]" target=3D"_blank">ia=
[email protected]</a>&gt;</span> wrote:<br>
</div></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bo=
rder-left:1px #ccc solid;padding-left:1ex"><div><div class=3D"h5">Hi, I&#39=
;m using form encode for validation, and am building a ReST back end for us=
e with Dojo data stores. the Dojo system wants to be able to use PUT reques=
ts with partial lists of params, and I&#39;m trying to figure out best to d=
o that. So if I have a schema, and some keys are missing, I want it to &#39=
;pass&#39;, with the values dictionary as is, rather than having the values=
 dict have values for the missing keys 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><font color=3D"#888888"><div=
>

Iain</div>
</font></span><br></div></div>---------------------------------------------=
---------------------------------<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" target=3D"_blan=
k">FormEncode-discuss-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org</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><span class=3D"HOEnZb"><font color=3D"#888888"><br><=
br clear=3D"all"><div><br></div>-- <br>Christopher Lambacher<br><a href=3D"=
mailto:[email protected]" target=3D"_blank">[email protected]</a>=
<br>
</font></span></div>
</blockquote></div><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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