Class: Graphiti::Sideload::PolymorphicBelongsTo

Inherits:
BelongsTo show all
Defined in:
lib/graphiti/sideload/polymorphic_belongs_to.rb

Defined Under Namespace

Classes: Group, Grouper

Constant Summary

Constants inherited from Graphiti::Sideload

HOOK_ACTIONS, TYPES

Instance Attribute Summary collapse

Attributes inherited from Graphiti::Sideload

#group_name, #link, #name, #parent, #parent_resource_class, #polymorphic_as

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from BelongsTo

#base_filter, #ids_for_parents, #load_params

Methods inherited from Graphiti::Sideload

after_save, #always_include_resource_ids?, assign, #assign, assign_each, #assign_each, #associate, #associate_all, #association_name, #base_scope, #clear_resources, #create_remote_resource, #description, #disassociate, #errors, #fire_hooks!, #foreign_key, hooks, #ids_for_parents, link, #link?, #link_extra_fields, #link_filter, #load, #load_params, params, #parent_resource, #performant_assign?, #polymorphic_child?, #polymorphic_has_many?, #polymorphic_has_one?, #polymorphic_parent?, pre_load, #primary_key, #readable?, #remote?, #resource, #resource_class, #resource_class_loaded?, #scope, scope, #shared_remote?, #single?, #writable?

Constructor Details

#initialize(name, opts) ⇒ PolymorphicBelongsTo

Returns a new instance of PolymorphicBelongsTo.



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# File 'lib/graphiti/sideload/polymorphic_belongs_to.rb', line 89

def initialize(name, opts)
  super
  self.children = {}
  grouper.apply(self, parent_resource_class)
end

Instance Attribute Details

#children ⇒ Object

Returns the value of attribute children.



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# File 'lib/graphiti/sideload/polymorphic_belongs_to.rb', line 73

def children
  @children
end

Class Method Details

.group_by(name, opts = {}, &blk) ⇒ Object 



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# File 'lib/graphiti/sideload/polymorphic_belongs_to.rb', line 84

def self.group_by(name, opts = {}, &blk)
  self.grouper = Grouper.new(name, opts)
  grouper.instance_eval(&blk)
end

Instance Method Details

#child_for_type(type) ⇒ Object 



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# File 'lib/graphiti/sideload/polymorphic_belongs_to.rb', line 95

def child_for_type(type)
  children.values.find do |sideload|
    sideload.resource.type == type
  end
end

#child_for_type!(type) ⇒ Object 



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# File 'lib/graphiti/sideload/polymorphic_belongs_to.rb', line 101

def child_for_type!(type)
  if (child = child_for_type(type))
    child
  else
    err = ::Graphiti::Errors::PolymorphicSideloadTypeNotFound
    raise err.new(self, type)
  end
end

#infer_foreign_key ⇒ Object 



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# File 'lib/graphiti/sideload/polymorphic_belongs_to.rb', line 80

def infer_foreign_key
  :"#{name}_id"
end

#resolve(parents, query, graph_parent) ⇒ Object 



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# File 'lib/graphiti/sideload/polymorphic_belongs_to.rb', line 110

def resolve(parents, query, graph_parent)
  parents.group_by(&grouper.field_name).each_pair do |group_name, group|
    next if group_name.nil? || grouper.ignore?(group_name)

    match = ->(c) { c.group_name == group_name.to_sym }
    if (sideload = children.values.find(&match))
      duped = remove_invalid_sideloads(sideload.resource, query)
      sideload.resolve(group, duped, graph_parent)
    else
      err = ::Graphiti::Errors::PolymorphicSideloadChildNotFound
      raise err.new(self, group_name)
    end
  end
end

#type ⇒ Object 



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# File 'lib/graphiti/sideload/polymorphic_belongs_to.rb', line 76

def type
  :polymorphic_belongs_to
end