In my application, I have Country, Region & City.
class Country < ActiveRecord::Base
has_many :cities
has_many :regions
class Region < ActiveRecord::Base
belongs_to :country
has_many :cities
class City < ActiveRecord::Base
belongs_to :country
belongs_to :region
This is my model where I have the filters
scope :with_country_id, lambda { |country_ids|
where(:country_id => [*country_ids])
}
delegate :name, to: :country, prefix: true
scope :with_region_id, lambda { |region_ids|
where(:region_id => [*region_ids])
}
delegate :name, to: :region, prefix: true
scope :with_city_id, lambda { |city_ids|
where(:city_id => [*city_ids])
}
delegate :name, to: :city, prefix: true
The filter itself works fine, but how can I make the filter so when the user has selected country, my with_region_id & with_city_id, also get updated based on their association?
For instance, I have countries: USA, UK when the user selects UK, with_region_id gets updated and only shows regions that belongs to UK.
I used dynamic menus to solve this issue:
I changed:
= f.collection_select :with_country_id,@filterrific.select_options[:with_country_id]
= f.collection_select :with_region_id,@filterrific.select_options[:with_region_id]
to:
= f.collection_select :with_country_id, Country.order(:name), :id, :name, {}, { class: 'class'}
= f.grouped_collection_select :with_region_id, Country.order(:name), :regions, :name, :id, :name, include_blank: true
JS:
(function() {
jQuery(function() {
var regions;
regions = $('#filterrific_with_region_id').html();
if($('#filterrific_with_country_id option').is(':selected')){
var country, escaped_country, options;
country = $('#filterrific_with_country_id :selected').text();
escaped_country = country.replace(/([ #;&,.+*~\':"!^$[\]()=>|\/@])/g, '\\$1');
options = $(regions).filter("optgroup[label='" + escaped_country + "']").html();
if (options) {
$('#filterrific_with_region_id').html('<option value="">(Select one)</option>'+options);
} else {
$('#filterrific_with_region_id').html('<option value="">Please Select a Country</option>');
}
return $('#filterrific_with_country_id').change(function() {
var country, escaped_country, options;
country = $('#filterrific_with_country_id :selected').text();
escaped_country = country.replace(/([ #;&,.+*~\':"!^$[\]()=>|\/@])/g, '\\$1');
console.log(escaped_country);
options = $(regions).filter("optgroup[label='" + escaped_country + "']").html();
if (options) {
$('#filterrific_with_region_id').html('<option value="">(Select one)</option>'+options);
} else {
$('#filterrific_with_region_id').html('<option value="">Please Select a Country</option>');
}
});
} else {
console.warn('NOT SELECTED');
return $('#filterrific_with_country_id').change(function() {
var country, escaped_country, options;
country = $('#filterrific_with_country_id :selected').text();
escaped_country = country.replace(/([ #;&,.+*~\':"!^$[\]()=>|\/@])/g, '\\$1');
console.log(escaped_country);
options = $(regions).filter("optgroup[label='" + escaped_country + "']").html();
if (options) {
$('#filterrific_with_region_id').html('<option value="">(Select one)</option>'+options);
} else {
$('#filterrific_with_region_id').html('<option value="">Please Select a Country</option>');
}
});
}
});