Meteor dynamically filters the dropdown when another dropdown is selected
[ UPDATE: I answered my own question and realized that the problem was with some strange formatting of the value Session.get()
, and the code I posted earlier should have worked more or less.
Regardless, I think other people might want to do the same task, so I threw a toy example on meteor.com here so people can see what I am trying to do (and hopefully helps others looking for one and the same solution). When I get back from work, I will try and remember to put the code on the meteorite (my office is blocking it).
Here's the original question / explanation for posterity:
I want to have each dropdown cause mongo to request a subsequent dropdown that filters the available options based on the option set by the previous dropdown.
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[ UPDATE: View the implementation of this answer here ]
OK, figured out how to do this, but also realized that I have another problem that was probably causing the problem, and preventing the values from setting correctly Session.set()
(I'll create a separate SO question for this).
I decided to start from scratch and just make a toy app that only had two dropdown fields so I could use the dependency functionality properly.
My office blocks are meteorpad , but I installed the code below, so I think you can paste it in and try this from. I added a third field and you can see that after selecting the first (Dept.) Field, it updates the available options in the second dropdown (Mfg.), And when you select the Mfg. Value, it updates the 3rd (Vendor).
main.html
<head>
<title>Dropdown Test</title>
</head>
<body>
{{> dropdowns}}
</body>
<!-- Begin Templates -->
<template name="dropdowns">
<field class="dept-name">Dept:
{{> departments}}
</field>
<field class="mfg-number">Mfg:
{{> manufacturers}}
</field>
<field class="vendor-name">Vendor:
{{> vendors}}
</field>
</template>
<!-- Department dropdown -->
<template name="departments">
<select autocomplete="off" name="departmentNums" class="form-control department-selection">
{{# each departmentNums}}
{{> departmentNum}}
{{/each}}
</select>
</template>
<template name="departmentNum">
<option>{{dept}}</option>
</template>
<!-- Manufacturer dropdown -->
<template name="manufacturers">
<select autocomplete="off" name="manufacturerNums" class="form-control manufacturer-selection">
{{# each manufacturers}}
{{> manufacturerNum}}
{{/each}}
</select>
</template>
<template name="manufacturerNum">
<option>{{mfg}}</option>
</template>
<!-- Vendor dropdown -->
<template name="vendors">
<select autocomplete="off" name="vendorNames" class="form-control vendor-selection">
{{# each vendorNames}}
{{> vendorName}}
{{/each}}
</select>
</template>
<template name="vendorName">
<option>{{name}}</option>
</template>
main.js
Vendors = new Mongo.Collection('vendors');
if (Meteor.isClient) {
/****************************** Subscriptions ********************************/
Meteor.subscribe('vendors');
/****************************** Department templates js ***********************/
Template.departments.helpers({
departmentNums: function() {
// Get all the departments and sort them ascending
var everything = Vendors.find({}, {sort: {dept:1}}).fetch();
// De-dupe list of departments
var justDepartments = _.pluck(everything,"dept");
return _.uniq(justDepartments);
}
});
Template.departments.events({
"change .department-selection": function(e, t){
return Session.set("department", $("[name=departmentNums]").val());
}
});
/****************************** Manufacturer templates js *********************/
Template.manufacturers.helpers({
manufacturers: function() {
// Find only manufacturers that have the same dept as the session and sort them ascending
var everything = Vendors.find({dept: Session.get('department')}, {sort: {mfg:1}}).fetch();
// De-dupe list of manufactuerers
var justManufacturers = _.pluck(everything, "mfg");
return _.uniq(justManufacturers);
}
});
Template.manufacturers.events({
"change .manufacturer-selection": function(e, t){
return Session.set("manufacturer", $("[name=manufacturerNums]").val());
}
})
/****************************** Vendor templates js *************************/
Template.vendors.helpers({
vendorNames: function(){
// Filter on vendors that have the same dept and mfg as in previous dropdowns
return Vendors.find(
{dept: Session.get('department'),
mfg: Session.get('manufacturer')}
);
},
getVendorName: function() {
Session.set("vendor", $("[name=vendorNames]").val());
}
});
Template.vendors.events({
"change .vendor-selection": function(e, t){
return Session.set("vendor", $("[name=vendorNames]").val())
}
});
}
// Populate Vendors collection if empty
if (Meteor.isServer) {
Meteor.startup(function() {
// Make sure the Vendors collection has data
if (Vendors.find().count() === 0) {
Vendors.insert({
name: 'CHANEL',
dept: '143',
mfg: '23'
});
Vendors.insert({
name: 'GUCCI',
dept: '234',
mfg: '36'
});
Vendors.insert({
name: 'COACH',
dept: '636',
mfg: '99'
});
Vendors.insert({
name: 'ROBERTO-COIN',
dept: '989',
mfg: '1'
});
Vendors.insert({
name: 'TOP SHOP',
dept: '143',
mfg: '86'
});
Vendors.insert({
name: 'KIMs SHIRTS',
dept: '234',
mfg: '86'
})
}
});
}
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