Class: ForestLiana::HasManyGetter

Inherits:
Object
  • Object
show all
Defined in:
app/services/forest_liana/has_many_getter.rb

Instance Method Summary collapse

Constructor Details

#initialize(resource, association, params) ⇒ HasManyGetter

Returns a new instance of HasManyGetter.



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# File 'app/services/forest_liana/has_many_getter.rb', line 3

def initialize(resource, association, params)
  @resource = resource
  @association = association
  @params = params
  @field_names_requested = field_names_requested
end

Instance Method Details

#count ⇒ Object 



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# File 'app/services/forest_liana/has_many_getter.rb', line 46

def count
  @records.to_a.length
end

#field_names_requested ⇒ Object 



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# File 'app/services/forest_liana/has_many_getter.rb', line 10

def field_names_requested
  return nil unless @params[:fields] && @params[:fields][@association.table_name]
  @params[:fields][@association.table_name].split(',')
                                        .map { |name| name.to_sym }
end

#includes ⇒ Object 



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# File 'app/services/forest_liana/has_many_getter.rb', line 29

def includes
  @association.klass
    .reflect_on_all_associations
    .select do |association|
      inclusion = !association.options[:polymorphic] &&
        SchemaUtils.model_included?(association.klass) &&
        [:belongs_to, :has_and_belongs_to_many].include?(association.macro)

      if @field_names_requested
        inclusion && @field_names_requested.include?(association.name)
      else
        inclusion
      end
    end
    .map { |association| association.name.to_s }
end

#perform ⇒ Object 



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# File 'app/services/forest_liana/has_many_getter.rb', line 16

def perform
  @records = @resource
    .unscoped
    .find(@params[:id])
    .send(@params[:association_name])
    .eager_load(includes)
  @records = sort_query
end

#records ⇒ Object 



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# File 'app/services/forest_liana/has_many_getter.rb', line 25

def records
  @records.limit(limit).offset(offset)
end