javascript - Why do I receive undefined value after reloading page in Meteor? -


so have following form:

template(name='edituser')   .row     .col-md-4.col-md-offset-4       .page-header         h1 edit user       form#edit-user-form         .form-group           label(for='name') name           input#user-name.form-control(type='text' placeholder='name' value='{{user.name}}')         .form-group           label(for='email') e-mail           input#user-email.form-control(type='text' placeholder='e-mail' value='{{getemail user}}')     button.btn.btn-primary(type='submit') update

the following handlebars.js-helper:

handlebars.registerhelper('getemail', function (user) {   if (user.emails && user.emails[0] && user.emails[0].address)     return user.emails[0].address;   return '';   });

and following iron-router code:

    editusercontroller = routecontroller.extend({       template: 'edituser',       waiton: function () {         return meteor.subscribe('user', this.params._id);       },       data: function () {         return {           user: meteor.users.findone( { _id: this.params._id } )         };       } });

if run application , click on link edit-user-form can see e-mail address. if change code , meteor automatically refreshes page, e-mail-field empty , console says, can't fetch value of undefined.

if use same form, with-helper, e-mail displayed if meteor automatically refreshes page:

template(name='edituser')   .row     .col-md-4.col-md-offset-4       .page-header         h1 edit user       form#edit-user-form         user           .form-group             label(for='name') name             input#user-name.form-control(type='text' placeholder='name' value='{{name}}')           .form-group             label(for='email') e-mail             input#user-email.form-control(type='text' placeholder='e-mail' value='{{getemail this}}')       button.btn.btn-primary(type='submit') update

why so? , should use with-helper if single results (only 1 result display)?

thanks in advance!

replace meteor.users.findone meteor.users.find.

when findone doesn’t find anything, returns undefined causes error; when find doesn’t find anything, returns empty cursor meteor knows with. doing adding with cause meteor check if value undefined, check isn’t necessary cursor, empty or otherwise.


Comments

Post a Comment

Popular posts from this blog

apache - Remove .php and add trailing slash in url using htaccess not loading css -

i have add following code htaccess file removing .php extension , add trailing slash urls. worked fine reduced page loading speed , css code not loading @ all. pages ugly. please help rewriteengine on rewritebase / ## hide .php extension snippet # externally redirect /dir/foo.php /dir/foo rewritecond %{the_request} ^[a-z]{3,}\s([^.]+)\.php [nc] rewriterule ^ %1/ [r,l] # add trailing slash rewritecond %{request_filename} !-f rewritecond %{request_uri} !/$ rewriterule . %{request_uri}/ [l,r=301] # internally forward /dir/foo /dir/foo.php rewritecond %{request_filename} !-d rewritecond %{request_filename}.php -f rewriterule ^(.*?)/?$ $1.php [l] we can rewrite urls using .htaccess files. before writing in .htaccess files need verify kind of server using. can check server adding a <?php phpinfo(); ?> in php page. ensure mod_rewrite module enabled in apache server. can identified checking phpinfo included page. common methods used url rewriting follows ...
Read more

javascript - jQuery show full size image on click -

pretty self explanatory not workking . i want display full image when user click on image... yes know there tons of plugins but i want keep simple. any idea ? css : .full { display: none; width: 500px; height: 500px; margin-left: 100px; margin-top: -300px; position: fixed; background-color: #f00; z-index: 6; } .thumbnail { width: 50px; height: 50px; } html: <img class="thumbnail" src="http://4.bp.blogspot.com/-uhbdp2esxng/txneptvi92i/aaaaaaaaaky/upfqis7zto0/s1600/rihanna-wallpaper.jpg"> jquery: $(document).ready(function() { $('.thumbnail').on('click', function() { var img = $('<img />',{src:this.src,'class':'full'}); $('.full').html(img).show(); console.log('done!'); }); }); try looking how jquery works. $(document).ready(function() { $('.thumbnail').on('click', function(...
Read more