<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">Jim, here’s the documentation for writing custom validators: <a href="http://wtforms.readthedocs.org/en/latest/validators.html#custom-validators">http://wtforms.readthedocs.org/en/latest/validators.html#custom-validators<br></a></div> <div id="bloop_sign_1445266097957164032" class="bloop_sign"></div> <div class="airmail_ext_on" style="color:black"><br>From: <span style="color:black">Tiger Nassau</span> <a href="mailto:tigernassau@gmail.com"><tigernassau@gmail.com></a><br>Reply: <span style="color:black">Tiger Nassau</span> <a href="mailto:tigernassau@gmail.com"><tigernassau@gmail.com></a><br>Date: <span style="color:black">October 19, 2015 at 10:46:22 AM</span><br>To: <span style="color:black">Jim Icenhower</span> <a href="mailto:jicenhower@yahoo.com"><jicenhower@yahoo.com></a><br>CC: <span style="color:black">flask@python.org</span> <a href="mailto:flask@python.org"><flask@python.org></a><br>Subject: <span style="color:black"> Re: [Flask] Can I write my own WTF file validator? <br></span></div><br> <blockquote type="cite" class="clean_bq"><span><div><div></div><div>
<title></title>
<p dir="ltr">you must be a windows person (: this is open source
and you can do anything you want to your app - just try out your
idea and test - its only form stuff so should not break too much of
the app if it does not work post any specific errors
and others can help more</p>
<p dir="ltr">if you get it working and think it will benefit others
then post a blog and submit the code via a pull request</p>
<p dir="ltr">Sent from <a href="http://r.typeapp.com">Type
Mail</a></p>
<div class="gmail_quote">On Oct 19, 2015, at 07:02, Jim Icenhower
via Flask <<a href="mailto:flask@python.org" target="_blank">flask@python.org</a>> wrote:
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div style="color:#000; background-color:#fff; font-family:verdana, helvetica, sans-serif;font-size:16px">
<div id="yui_3_16_0_1_1445007835253_64473"><span>Hi,</span></div>
<div dir="ltr" id="yui_3_16_0_1_1445007835253_64475"><span id="yui_3_16_0_1_1445007835253_64474">I'm creating an import using
Flask, WTF and Flask Appbuilder. I see that the Flask WTF FileField
allows validators. Can I create my own? I want to check that
required fields are populated on every record in the uploaded file.
I'd like to pass a class to the validator that contains the
required fields so I can use this routine for many different record
types.</span></div>
<div dir="ltr" id="yui_3_16_0_1_1445007835253_64477"><span id="yui_3_16_0_1_1445007835253_64476">I think I'd like to do something
like this:</span></div>
<div dir="ltr" id="yui_3_16_0_1_1445007835253_64478"><span class="" id="yui_3_16_0_1_1445007835253_64365" style="font-family: Consolas, Menlo, 'Deja Vu Sans Mono', 'Bitstream Vera Sans Mono', monospace; font-size: 0.85em; line-height: 1.3em; white-space: pre-wrap; color: rgb(0, 68, 97); font-weight: bold;">
class</span> <span class="" id="yui_3_16_0_1_1445007835253_64367" style="font-family: Consolas, Menlo, 'Deja Vu Sans Mono', 'Bitstream Vera Sans Mono', monospace; font-size: 0.85em; line-height: 1.3em; white-space: pre-wrap;">
UploadForm</span><span class="" id="yui_3_16_0_1_1445007835253_64369" style="font-family: Consolas, Menlo, 'Deja Vu Sans Mono', 'Bitstream Vera Sans Mono', monospace; font-size: 0.85em; line-height: 1.3em; white-space: pre-wrap; font-weight: bold;">(</span><span class="" id="yui_3_16_0_1_1445007835253_64371" style="font-family: Consolas, Menlo, 'Deja Vu Sans Mono', 'Bitstream Vera Sans Mono', monospace; font-size: 0.85em; line-height: 1.3em; white-space: pre-wrap;">Form</span><span class="" id="yui_3_16_0_1_1445007835253_64373" style="font-family: Consolas, Menlo, 'Deja Vu Sans Mono', 'Bitstream Vera Sans Mono', monospace; font-size: 0.85em; line-height: 1.3em; white-space: pre-wrap; font-weight: bold;">):</span><br>
</div>
<pre style="overflow-x: auto; overflow-y: hidden; font-family: Consolas, Menlo, 'Deja Vu Sans Mono', 'Bitstream Vera Sans Mono', monospace; font-size: 0.85em; margin: 15px -30px; line-height: 1.3em; padding: 7px 30px; border-radius: 2px; color: rgb(62, 67, 73); background: rgb(238, 238, 238);" id="yui_3_16_0_1_1445007835253_64363" class=""> <span class="" style="color: rgb(0, 0, 0);" id="yui_3_16_0_1_1445007835253_64375">upload</span> <span class="" style="color: rgb(88, 40, 0);" id="yui_3_16_0_1_1445007835253_64377">=</span> <span class="" style="color: rgb(0, 0, 0);" id="yui_3_16_0_1_1445007835253_64379">FileField</span><span class="" style="color: rgb(0, 0, 0); font-weight: bold;" id="yui_3_16_0_1_1445007835253_64381">(</span><span class="" style="color: rgb(78, 154, 6);" id="yui_3_16_0_1_1445007835253_64383">"Upload your Events file"</span><span class="" style="color: rgb(0, 0, 0); font-weight: bold;" id="yui_3_16_0_1_1445007835253_64385">,</span>
<span class="" style="color: rgb(0, 0, 0);" id="yui_3_16_0_1_1445007835253_64387">validators</span><span class="" style="color: rgb(88, 40, 0);" id="yui_3_16_0_1_1445007835253_64389">=</span><span class="" style="color: rgb(0, 0, 0); font-weight: bold;" id="yui_3_16_0_1_1445007835253_64391">[</span><span class="" style="color: rgb(0, 0, 0);" id="yui_3_16_0_1_1445007835253_64393">file_required</span><span class="" style="color: rgb(0, 0, 0); font-weight: bold;" id="yui_3_16_0_1_1445007835253_64395">(),</span>
<span class="" style="color: rgb(0, 0, 0);" id="yui_3_16_0_1_1445007835253_64397">file_required_fields</span><span class="" style="color: rgb(0, 0, 0); font-weight: bold;" id="yui_3_16_0_1_1445007835253_64399">(</span><span class="" style="color: rgb(0, 0, 0);" id="yui_3_16_0_1_1445007835253_64401">Events</span><span class="" style="color: rgb(0, 0, 0); font-weight: bold;" id="yui_3_16_0_1_1445007835253_64403">,</span> <span class="" style="color: rgb(78, 154, 6);" id="yui_3_16_0_1_1445007835253_64405">"Images only!"</span><span class="" style="color: rgb(0, 0, 0); font-weight: bold;" id="yui_3_16_0_1_1445007835253_64407">)])</span>
</pre>
<div dir="ltr" id="yui_3_16_0_1_1445007835253_64479">Is this
possible? If so, what class to I extend/inherit from to create my
validator? I'm a Java developer but a total newbie to
Python/Flask.</div>
<div dir="ltr" id="yui_3_16_0_1_1445007835253_64480"><br></div>
<div dir="ltr" id="yui_3_16_0_1_1445007835253_64481">Thanks!</div>
<div id="yui_3_16_0_1_1445007835253_64482"><br></div>
<div class="signature" id="yui_3_16_0_1_1445007835253_64483">
Jim</div>
</div>
<pre class="blue"></pre>
<hr>
<pre><br>Flask mailing list<br>Flask@python.org<br><a href="https://mail.python.org/mailman/listinfo/flask">https://mail.python.org/mailman/listinfo/flask</a><br>
</pre></blockquote>
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