Class: GraphitiGraphQL::Federation::Loaders::HasMany

Inherits:
GraphQL::Batch::Loader
  • Object
show all
Defined in:
lib/graphiti_graphql/federation/loaders/has_many.rb

Instance Method Summary collapse

Constructor Details

#initialize(federated_relationship, params) ⇒ HasMany

Returns a new instance of HasMany.



5
6
7
8
9
10
 
# File 'lib/graphiti_graphql/federation/loaders/has_many.rb', line 5

def initialize(federated_relationship, params)
  @federated_relationship = federated_relationship
  @resource_class = federated_relationship.local_resource_class
  @params = params
  @foreign_key = federated_relationship.foreign_key
end

Instance Method Details

#perform(ids) ⇒ Object 



12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
 
# File 'lib/graphiti_graphql/federation/loaders/has_many.rb', line 12

def perform(ids)
  @params[:filter] ||= {}
  @params[:filter][@foreign_key] = {eq: ids.join(",")}

  @federated_relationship.params_block&.call(@params)

  if (first = @params.delete(:first))
    @params[:page] ||= {}
    @params[:page][:size] = first
  end
  if (after = @params.delete(:after))
    @params[:page] ||= {}
    @params[:page][:after] = after
  end
  if (before = @params.delete(:before))
    @params[:page] ||= {}
    @params[:page][:before] = before
  end

  if ids.length > 1 && @params[:page]
    raise Graphiti::Errors::UnsupportedPagination
  elsif !@params[:page]
    @params[:page] = {size: 999}
  end

  Util.with_gql_context do
    records = @resource_class.all(@params).as_json[:data]
    map = records.group_by { |record| record[@foreign_key].to_s}
    ids.each { |id| fulfill(id, (map[id] || [])) }
  end
end