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POCancel button on a form causing meteor to throw exceptions when redraw happens
 

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  1. POCancel button on a form causing meteor to throw exceptions when redraw happens
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    <p>I'm struggling to get a cancel button work on a meteor form. There is some interaction between the button and the reactivity on the form that is causing exceptions.</p> <p>I have a form with two buttons, some inputs and some check boxes. The check boxes trigger some more input fields to be shown/hidden (which is working fine).</p> <p>The cancel button, if pressed <strong>before</strong> any check box is used works fine. Once a check box has been activated however the app blows up with an exception as soon as a checkbox is checked (but after the extra input fields have displayed).</p> <pre><code>&gt; Exception from Deps recompute: &gt; Patcher._copyAttributes@http://localhost:3000/packages/spark.js?3a050592ceb34d6c585c70f1df11e353610be0ab:1797 &gt; Patcher.prototype.match@http://localhost:3000/packages/spark.js?3a050592ceb34d6c585c70f1df11e353610be0ab:1552 &gt; patch/&lt;@http://localhost:3000/packages/spark.js?3a050592ceb34d6c585c70f1df11e353610be0ab:1364 &gt; patch/visitNodes@http://localhost:3000/packages/spark.js?3a050592ceb34d6c585c70f1df11e353610be0ab:1320 &gt; patch/visitNodes@http://localhost:3000/packages/spark.js?3a050592ceb34d6c585c70f1df11e353610be0ab:1321 &gt; patch/visitNodes@http://localhost:3000/packages/spark.js?3a050592ceb34d6c585c70f1df11e353610be0ab:1321 &gt; patch/visitNodes@http://localhost:3000/packages/spark.js?3a050592ceb34d6c585c70f1df11e353610be0ab:1321 &gt; patch/visitNodes@http://localhost:3000/packages/spark.js?3a050592ceb34d6c585c70f1df11e353610be0ab:1321 &gt; patch@http://localhost:3000/packages/spark.js?3a050592ceb34d6c585c70f1df11e353610be0ab:1334 &gt; Spark.renderToRange/&lt;/&lt;@http://localhost:3000/packages/spark.js?3a050592ceb34d6c585c70f1df11e353610be0ab:699 &gt; LiveRange.prototype.operate@http://localhost:3000/packages/liverange.js?b3097d72d458e645fd4f0021c8ff5189abe8d98a:491 &gt; Spark.renderToRange/&lt;@http://localhost:3000/packages/spark.js?3a050592ceb34d6c585c70f1df11e353610be0ab:693 &gt; withEventGuard@http://localhost:3000/packages/spark.js?3a050592ceb34d6c585c70f1df11e353610be0ab:162 &gt; Spark.renderToRange@http://localhost:3000/packages/spark.js?3a050592ceb34d6c585c70f1df11e353610be0ab:692 &gt; Spark.isolate/&lt;@http://localhost:3000/packages/spark.js?3a050592ceb34d6c585c70f1df11e353610be0ab:925 &gt; ._compute@http://localhost:3000/packages/deps.js?eba25ec453bb70e5ae5c2c54192d21e0e4d82780:183 &gt; ._recompute@http://localhost:3000/packages/deps.js?eba25ec453bb70e5ae5c2c54192d21e0e4d82780:196 &gt; .flush@http://localhost:3000/packages/deps.js?eba25ec453bb70e5ae5c2c54192d21e0e4d82780:288 </code></pre> <p>All the digging I've done seems to indicate a problem with the HTML but I can't find it. I've eliminated all of the code in the form and replaced it to narrow down the problem to the cancel button.</p> <p>The form code is</p> <pre><code>&lt;template name="joinLayout"&gt; &lt;section class="content" &gt; &lt;div class="modal fade in show" role="dialog" tabindex="-1" aria-hidden="true"&gt; {{&gt; joinLayoutInner}} &lt;/div&gt; &lt;/section&gt; &lt;/template&gt; &lt;template name="joinLayoutInner"&gt; &lt;div class="modal-header"&gt; &lt;h1&gt;Thankyou for Joining Tradebase.&lt;/h1&gt; &lt;h3&gt;Please fill in the information below.&lt;/h3&gt; &lt;/div&gt; &lt;form id="joinForm" action="action" class="col-sm-10 form-horizontal" role="form"&gt; &lt;div class="modal-body"&gt; &lt;div class="form-group"&gt; &lt;label for="joinEmail" class="col-sm-2 control-label"&gt;Email&lt;/label&gt; &lt;div class="col-sm-10"&gt; &lt;input type="email" class="form-control" id="joinEmail" placeholder = "Required"&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class="form-group"&gt; &lt;label for="joinPassword" class="col-sm-2 control-label"&gt;Password&lt;/label&gt; &lt;div class="col-sm-10"&gt; &lt;input type="password" class="form-control" id="joinPassword" placeholder = "Required"&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class="form-group"&gt; &lt;label for="joinPhone" class="col-sm-2 control-label"&gt;Phone&lt;/label&gt; &lt;div class="col-sm-10"&gt; &lt;input type="tel" class="form-control" id="joinPhone" placeholder = "Required"&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class="form-group"&gt; &lt;label for="joinSuburb" class="col-sm-2 control-label"&gt;Suburb&lt;/label&gt; &lt;div class="col-sm-10"&gt; &lt;input type="text" class="form-control" id="joinSuburb" placeholder = "Required"&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class="form-group"&gt; &lt;label for="joinState" class="col-sm-2 control-label"&gt;State&lt;/label&gt; &lt;div class="col-sm-10"&gt; &lt;input type="text" class="form-control" id="joinState" placeholder = "Required"&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class="form-group"&gt; &lt;label for="joinPostCode" class="col-sm-2 control-label"&gt;Post Code&lt;/label&gt; &lt;div class="col-sm-10"&gt; &lt;input type="text" class="form-control" id="joinPostCode" placeholder = "Required"&gt; &lt;/div&gt; &lt;/div&gt; {{#if joinTradie}} &lt;div class="form-group"&gt; &lt;label for="joinTradeCat" class="col-sm-2 control-label"&gt;Trade Category&lt;/label&gt; &lt;div class="col-sm-10"&gt; &lt;input type="text" class="form-control" id="joinTradeCat" placeholder = "Required"&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class="form-group"&gt; &lt;label for="joinLicNo" class="col-sm-2 control-label"&gt;License Number&lt;/label&gt; &lt;div class="col-sm-10"&gt; &lt;input type="text" class="form-control" id="joinLicNo" placeholder = "Required"&gt; &lt;/div&gt; &lt;/div&gt; {{/if}} {{#if joinStudent}} &lt;div class="form-group"&gt; &lt;label for="joinCourse" class="col-sm-2 control-label"&gt;Course&lt;/label&gt; &lt;div class="col-sm-10"&gt; &lt;input type="text" class="form-control" id="joinCourse" placeholder = "Required"&gt; &lt;/div&gt; &lt;/div&gt; {{/if}} &lt;div class="form-group well" id="joinWell"&gt; &lt;label class="checkbox-inline input-lg"&gt; &lt;input id="joinUserCheck" type="checkbox" value="user" name="role" disabled checked&gt;User&lt;/input&gt; &lt;/label&gt; &lt;label class="checkbox-inline input-lg"&gt; &lt;input id="joinTradieCheck" type="checkbox" value="tradie" name="role" &gt;Tradie&lt;/input&gt; &lt;/label&gt; &lt;label class="checkbox-inline input-lg"&gt; &lt;input id="joinSponsorCheck" type="checkbox" value="sponsor" name="role" &gt;Sponsor&lt;/input&gt; &lt;/label&gt; &lt;label class="checkbox-inline input-lg"&gt; &lt;input id="joinStudentCheck" type="checkbox" value="student" name="role" &gt;Student&lt;/input&gt; &lt;/label&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class="modal-footer"&gt; &lt;div class="form-group"&gt; &lt;div class="col-sm-offset-2 col-sm-5"&gt; &lt;button type="submit" class="btn btn-primary btn-lg pull-left"&gt;Join&lt;/button&gt; &lt;/div&gt; &lt;div class"col-sm-5"&gt; &lt;button type="button" id="joinCancel" class="bnt btn-default btn-lg pull-right"&gt;Cancel&lt;/button&gt; &lt;/div&gt; &lt;/div&gt; &lt;/div&gt; &lt;/form&gt; &lt;/template&gt; </code></pre> <p>and the associated js</p> <pre><code>Template.joinLayoutInner.events({ 'click #joinTradieCheck': function(e) { console.log("Tradie checkbox clicked"); Session.set("joinTradieTag", (joinTradieCheck.checked?1:0)); }, 'click #joinStudentCheck': function(e) { console.log("Student checkbox clicked"); Session.set("joinStudentTag", (joinStudentCheck.checked?1:0)); }, 'click #joinSponsorCheck': function(e) { console.log("Sponsor checkbox clicked"); Session.set("joinSponsorTag", (joinSponsorCheck.checked?1:0)); } }); Template.joinLayoutInner.helpers({ joinTradie: function() { return Session.get("joinTradieTag"); }, joinStudent: function() { return Session.get("joinStudentTag"); }, joinSponsor: function() { return Session.get("joinSponsorTag"); } }); Template.joinLayout.events({ 'click #joinCancel': function(e) { e.preventDefault(); Router.go('loginPage'); }, 'submit #joinForm': function(e,t) { e.preventDefault(); console.log("Form Sumbitted"); } }); </code></pre> <p>If I comment out the html line for the cancel button, everything works as expected. As soon as I put that button back in.. boom.</p> <p>Any ideas please?</p>
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    1. USPeter NUnn
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    1. COWhat's the deal with the `joinSponsorCheck.checked?1:0`? To convert a boolean to a 1 or 0, you can just use the unary plus operator, e.g. `+joinSponsorCheck.checked`.
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      1. POCancel button on a form causing meteor to throw exceptions when redraw happens
      1. USsbking
    2. COmaybe try putting the cancel button inside a {{#isolate}}...{{/isolate}} block?
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      1. POCancel button on a form causing meteor to throw exceptions when redraw happens
      1. USflylib
    3. COThat is very cool Cuberto, I didn't know about the unary+ being able to do that. #isolate didn't help flylib.
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      1. POCancel button on a form causing meteor to throw exceptions when redraw happens
      1. USPeter NUnn
 

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