Activeadmin::AjaxFilter

This gem extends ActiveAdmin so that your can use filters with AJAX-powered input.

Prerequisites

Minimum Ruby version 2.5

This extension assumes that you're using Active Admin with Ransack. And for AJAX input it uses selectize-rails

Version 0.4.5 - could brake you build due to issue with sprockets version major update, now it's yanked, use 0.4.6 instead.

If you on sprockets >= 4 and rails >= 5 use version 0.5.0

Installation

Add this line to your application's Gemfile:

gem 'activeadmin-ajax_filter'

And then execute:

$ bundle

Or install it yourself as:

$ gem install activeadmin-ajax_filter

Usage

Include this line in your JavaScript code (active_admin.js.coffee)

#= require selectize
#= require activeadmin-ajax_filter

Include this line in your CSS code (active_admin.scss)

@import "selectize";
@import "selectize.default";
@import "activeadmin-ajax_filter";

Include ActiveAdmin::AjaxFilter module to the ActiveAdmin relation resource for which you want to support filtering and add ajax_select filter to main resource. For example:

# Relation-resource
ActiveAdmin.register User do
  include ActiveAdmin::AjaxFilter
  # ...
end

# Main resource
# As a filter
ActiveAdmin.register Invoice do
  filter :user, as: :ajax_select, data: { 
    url: :filter_admin_users_path, 
    search_fields: [:email, :customer_uid], 
    limit: 7,
  }
  # ...
end

# As a form input
ActiveAdmin.register Invoice do
  form do |f|
    f.input :language # used by ajax_search_fields
    f.input :user, as: :ajax_select, data: { 
      url: filter_admin_users_path,
      search_fields: [:name], 
      static_ransack: { active_eq: true }, 
      ajax_search_fields: [:language_id],
    }
    # ...
  end
end

You can use next parameters in data hash:

• search_fields - fields by which AJAX search will be performed, required
• display_fields - fields which will be displayed in drop down list during search, first field will be displayed for selected option
• limit - count of the items which will be requested by AJAX, by default 5
• value_field - value field for html select element, by default id
• ordering - sort string like email ASC, customer_uid DESC, by default it uses first value of search_fields with ASC direction
• ransack - ransack query which will be applied, by default it's builded from search_fields with or and contains clauses, e.g.: email_or_customer_uid_cont
• url - url for AJAX query by default is builded from field name. For inputs you can use url helpers, but on filters level url helpers isn't available, so if you need them you can pass symbols and it will be evaluated as url path (e.g. :filter_admin_users_path). String with relative path (like /admin/users/filter) can be used for both inputs and filters.
• ajax_search_fields - array of field names. ajax_select input depends on ajax_search_fields values: e.g. you can scope user by languages.
• static_ransack - hash of ransack predicates which will be applied statically and independently from current input field value
• min_chars_count_to_request - minimal count of chars in the input field to make an AJAX request

Filter by belongs_to relation fields

class Patient < ApplicationRecord
  belongs_to :user
  # ...
end

f.input :patient, as: :ajax_select, collection: [], data: {
  display_fields: ['id', 'user.name'],
  search_fields: ['user.name'],
  ordering: 'id ASC',
  url: :filter_admin_patients_path
}

Ordering by related fields doesn't work, e.g. this will not work: ordering: 'user.name ASC'

Caveats

Ransack _cont on Integer column

Due to issue with Ransack and Postgres it's not possbile to make searches like id_cont because id is a Integer type (more here https://github.com/activerecord-hackery/ransack/issues/85)

The way to handle it find with another predicate like:

filter :user_id, as: :ajax_select, collection: [], data: {
    url: '/admin/users/filter',
    display_fields: [:full_name, :phone],
    ransack: 'id_eq', # !!! predicate is ovewritten to `eq` by default it's `cont`
    search_fields: ['id'],
  }

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/holyketzer/activeadmin-ajax_filter. This project is intended to be a safe, welcoming space for collaboration.

License

The gem is available as open source under the terms of the MIT License.