Meteor: Querying a collection based on a URL parameter - meteor

Question

I am trying display the unique profile of a babysitter (i.e: babysitter username, city, postal code, etc ... ) from a schema/collection called "Babysitters" .
The URL correctly contains the babysitter unique _id, say:
http://localhost:3000/test/PqMviBpYAmTA2b5ec
but I don't manage to retrieve all the other fields.
meteor question - screenshot
I have tried querying the MongoDB in two files: routes.js and the template test.js
1) in routes.js
Router.route('/test/:_id', {
name: 'test',
data: function () {
return Babysitters.findOne({ _id: this.params._id });
}
});
2) in test.js
Template.test.helpers({
data: function () {
//sitterusername = this.params.sitterusername;
//console.log(this.params._id );
return Babysitters.findOne( { _id: this.params._id });
}
});
the html file: test.html
<template name="test">
{{#with data}}
<ul>
<li><img src="/" {{photourl}} height="100" width="100" ></li>
<li>Babysitter username: {{ sitterusername }}</li>
<li>Presentation: {{ presentation }}</li>
<li>City: {{ city }}</li>
<li>Postal Code: {{ postalcode }}</li>
<li>Mother tongue: {{ mothertongue }}</li>
<li>Languages spoken {{ languagesspoken }}</li>
<li>Experience {{ experience }}</li>
<li>Homework help: {{ homeworkhelpavailable }}</li>
<li>Hourly wages: {{ hourlywages }} €/h</li>
</ul>
{{/with}}
</template>
I have tried all sorts of ways but the Collection fields never appear in the HTML file.
Thanks for your help, a newbie here.
K.

Answer 1

Most likely you are not publishing all Babysitters to the client so your .findOne() returns nothing.
This is a common router pattern where you want to display a single document which is not normally published. A good way to solve this in i-r is to waitOn a subscription to the individual document:
waitOn: function(){
return Meteor.subscribe('oneBabysitter', this.params._id);
}
On the server, publish:
Meteor.publish('oneBabysitter',function(_id){
return Babysitters.find(_id);
});
Note that even though this publication is only going to return a single document you still have to do a .find() and not a .findOne() because publications need to return a cursor or array of cursors, not objects.