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require 'rails_admin/config'
require 'rails_admin/config/fields/base'
module RailsAdmin
module Config
module Fields
class Association < RailsAdmin::Config::Fields::Base
def self.inherited(klass)
super(klass)
end
# Reader for the association information hash
def association # rubocop:disable TrivialAccessors
@properties
end
register_instance_option :pretty_value do
v = bindings[:view]
[value].flatten.select(&:present?).collect do |associated|
amc = polymorphic? ? RailsAdmin.config(associated) : associated_model_config # perf optimization for non-polymorphic associations
am = amc.abstract_model
wording = associated.send(amc.object_label_method)
can_see = !am.embedded? && (show_action = v.action(:show, am, associated))
can_see ? v.link_to(wording, v.url_for(action: show_action.action_name, model_name: am.to_param, id: associated.id), class: 'pjax') : ERB::Util.html_escape(wording)
end.to_sentence.html_safe
end
# Accessor whether association is visible or not. By default
# association checks whether the child model is excluded in
# configuration or not.
register_instance_option :visible? do
@visible ||= !associated_model_config.excluded?
end
# use the association name as a key, not the association key anymore!
register_instance_option :label do
(@label ||= {})[::I18n.locale] ||= abstract_model.model.human_attribute_name association.name
end
# scope for possible associable records
register_instance_option :associated_collection_scope do
# bindings[:object] & bindings[:controller] available
associated_collection_scope_limit = (associated_collection_cache_all ? nil : 30)
proc do |scope|
scope.limit(associated_collection_scope_limit)
end
end
# inverse relationship
register_instance_option :inverse_of do
association.inverse_of
end
# preload entire associated collection (per associated_collection_scope) on load
# Be sure to set limit in associated_collection_scope if set is large
register_instance_option :associated_collection_cache_all do
@associated_collection_cache_all ||= (associated_model_config.abstract_model.count < 100)
end
# determines whether association's elements can be removed
register_instance_option :removable? do
association.foreign_key_nullable?
end
# Reader for the association's child model's configuration
def associated_model_config
@associated_model_config ||= RailsAdmin.config(association.klass)
end
# Reader for the association's child model object's label method
def associated_object_label_method
@associated_object_label_method ||= associated_model_config.object_label_method
end
# Reader for associated primary key
def associated_primary_key
@associated_primary_key ||= association.primary_key
end
# Reader for the association's key
def foreign_key
association.foreign_key
end
# Reader whether this is a polymorphic association
def polymorphic?
association.polymorphic?
end
# Reader for nested attributes
register_instance_option :nested_form do
association.nested_options
end
# Reader for the association's value unformatted
def value
bindings[:object].send(association.name)
end
# has many?
def multiple?
true
end
def virtual?
true
end
end
end
end
end
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