Class: GraphQL::FancyConnection

Inherits:
Pagination::RelationConnection
  • Object
show all
Defined in:
lib/graphql/fancy_connection.rb

Instance Method Summary collapse

Constructor Details

#initialize(loader, args, key, **super_args) ⇒ FancyConnection

Returns a new instance of FancyConnection.



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# File 'lib/graphql/fancy_connection.rb', line 3

def initialize(loader, args, key, **super_args)
  @loader = loader
  @args = args
  @key = key
  @then = nil

  super(nil, **super_args)
end

Instance Method Details

#cursor_for(item) ⇒ Object 



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# File 'lib/graphql/fancy_connection.rb', line 72

def cursor_for(item)
  item && encode(item.attributes['row_number'].to_s)
end

#edges ⇒ Object 



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# File 'lib/graphql/fancy_connection.rb', line 21

def edges
  @edges ||= nodes.then do |nodes|
    nodes.map { |n| @edge_class.new(n, self) }
  end
end

#end_cursor ⇒ Object 



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# File 'lib/graphql/fancy_connection.rb', line 66

def end_cursor
  base_nodes.then do |results|
    cursor_for(results.last)
  end
end

#has_next_page ⇒ Promise<Boolean>

Returns:

  • (Promise<Boolean>) 


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# File 'lib/graphql/fancy_connection.rb', line 39

def has_next_page # rubocop:disable Naming/PredicateName
  base_nodes.then do |results|
    if results.last
      results.last.attributes['row_number'] < results.last.attributes['total_count']
    else
      false
    end
  end
end

#has_previous_page ⇒ Promise<Boolean>

Returns:

  • (Promise<Boolean>) 


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# File 'lib/graphql/fancy_connection.rb', line 50

def has_previous_page # rubocop:disable Naming/PredicateName
  base_nodes.then do |results|
    if results.first
      results.first.attributes['row_number'] > 1
    else
      false
    end
  end
end

#nodes ⇒ Promise<Array<ApplicationRecord>>

Returns:

  • (Promise<Array<ApplicationRecord>>) 


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# File 'lib/graphql/fancy_connection.rb', line 13

def nodes
  if @then
    base_nodes.then(@then)
  else
    base_nodes
  end
end

#start_cursor ⇒ Object 



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# File 'lib/graphql/fancy_connection.rb', line 60

def start_cursor
  base_nodes.then do |results|
    cursor_for(results.first)
  end
end

#then(&block) ⇒ Object 



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# File 'lib/graphql/fancy_connection.rb', line 76

def then(&block)
  @then = block
  self
end

#total_count ⇒ Promise<Integer>

Returns:

  • (Promise<Integer>) 


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# File 'lib/graphql/fancy_connection.rb', line 28

def total_count
  base_nodes.then do |results|
    if results.first
      results.first.attributes['total_count']
    else
      0
    end
  end
end