Rails Select2 initselection load data from database - ruby-on-rails

Question

I have data coming from sunspot to select2(shown list_styles method of controller). I can search and save multiple categories with select2 on new provider form without any problems however when I try to load the data from database on edit provider form it doesn't show up. Tried the initselection method and checked the documentation/stackoverflow for initselection method that fits to my application but could not sort it out. Created a new controller method called list_categories without success. Can anyone comment me on the correct way to do it?
Thank you.
Jquery
$('#provider_category').select2({
minimumInputLength: 3,
multiple: true,
ajax: {
url: "/categories/list_styles",
dataType: 'json',
quietMillis: 100,
data: function (term, page) {
return {
q: term,
page_limit: 10,
page: page,
};
},
results: function (data) {
var hashtable={};
var results = \[\];
$.each(data, function(index, item){
if (hashtable\[item.parent\]===undefined) {
hashtable\[item.parent\]={text:item.parent, children:\[\]};
results.push(hashtable\[item.parent\]);
}
hashtable\[item.parent\].children.push({id:item._id,text:item.title});
});
return {
results: results
};
},
initSelection: function(element, callback) {
return $.ajax({
type: "get",
url: "/categories/list_categories",
dataType: 'json',
data: function (term, page) {
return {
q: term,
page_limit: 10,
page: page,
};
},
success: function(data){
}
}).done(function(data) {
//console.log(data);
return callback(data);
});
}
}
});
Controller
class CategoriesController < ApplicationController
respond_to :html, :json
def list_styles
search = Category.search do
fulltext params[:q]
end
search = Category.search { keywords params[:q]; paginate :page => params[:page], :per_page => params[:page_limit] }
#categories = search.results
respond_with #categories
end
def list_categories
search = Provider.find "5299b5dcdd506322c4000091"
#category = search.category
x = Category.find #category
search = Category.search { keywords x.title; paginate :page => params[:page], :per_page => params[:page_limit] }
#categories = search.results
respond_with #categories
end
end

Answer 1

Thats the way it is baby!
jquery
},
initSelection : function (element, callback) {
var data1 = [];
jQuery(element.val().split(",")).each(function () {
$.ajax({
type: "get",
url: "/providers/list_categories",
async: false,
dataType: 'json',
data: { id: $("#provider_id").val()},
success: function(category){
$.each(category, function(i, obj) {
data1.push({id: this._id, text: this.title});
});
}
});
});
callback(data1);
}
});
contoller
def list_categories
#provider = Provider.find params[:id]
arr = #provider.category.split(",")
#category = Category.where(:_id.in => arr)
respond_to do |format|
format.json { render :json => #category}
end
end