javascript - How to avoid Meteor helpers run multiple times -

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in template have html:

<input id="name"   type="text" value="{{card.name}}"> <input id="prefix" type="text" value="{{card.prefix}}"> <input id="phone"  type="tel"  value="{{card.phone}}">

and javascript

template.cardform.helpers({   card: function() {     return getcard();   } });  var getcard = function() {     console.log("i'm here !!!");     return cards.findone({_id: cardid}); }

when run app, console.log shows "i'm here !!!" 3 times, , think ecards.findone() executing 3 times.

how can avoid calls?

i want card object in order fill {{card.name}}, {{card.prefix}} , {{card.phone}}, 1 call getcard().

the card helper executed several times since card present in evaluated template code more once.

a pattern avoid duplicate calls in scenarios 1 you're facing use #with:

{{#with card}}   <input id="name"   type="text" value="{{name}}">   <input id="prefix" type="text" value="{{prefix}}">   <input id="phone"  type="tel"  value="{{phone}}"> {{/with}}

this call card once , run nested code in context of result.


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