Class: GraphQL::Sources::ActiveRecordBase

Inherits:

Dataloader::Source

• Object
• Dataloader::Source
• GraphQL::Sources::ActiveRecordBase

Defined in:

lib/graphql/sources/active_record_base.rb

Overview

An abstract class for interacting with active record.

Direct Known Subclasses

ActiveRecordCollection, ActiveRecordCount, ActiveRecordExists, ActiveRecordObject

Class Method Summary

• .batch_key_for(model, key: :id) ⇒ Array

  A key.

Instance Method Summary

• #initialize(model, key: :id) ⇒ ActiveRecordBase constructor

  A new instance of ActiveRecordBase.

Constructor Details

#initialize(model, key: :id) ⇒ ActiveRecordBase

Returns a new instance of ActiveRecordBase.

Parameters:

• model (Class) —

  a child class of ActiveRecord::Base (e.g. Comment)

• key (Symbol) (defaults to: :id) —

  an attribute (typically a foreign key) to use for loading (e.g. :user_id)

# File 'lib/graphql/sources/active_record_base.rb', line 18

def initialize(model, key: :id)
  super()
  @model = model
  @key = key
end

Class Method Details

.batch_key_for(model, key: :id) ⇒ Array

Returns a key.

Parameters:

• model (Class) —

  a child class of ActiveRecord::Base (e.g. Comment)

• key (Symbol) (defaults to: :id) —

  an attribute (typically a foreign key) to use for loading (e.g. :user_id)

Returns:

• (Array) —

  a key

# File 'lib/graphql/sources/active_record_base.rb', line 10

def self.batch_key_for(model, key: :id)
  return [model.to_sql, key] if model.is_a?(ActiveRecord::Relation)

  [model, key]
end