Class: Graphiti::Scoping::Paginate

Inherits:
Base show all
Defined in:
lib/graphiti/scoping/paginate.rb

Constant Summary collapse

DEFAULT_PAGE_SIZE = 
20

Instance Attribute Summary

Attributes inherited from Base

#query_hash, #resource

Instance Method Summary collapse

Methods inherited from Base

#initialize

Constructor Details

This class inherits a constructor from Graphiti::Scoping::Base

Instance Method Details

#apply ⇒ Object 



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# File 'lib/graphiti/scoping/paginate.rb', line 5

def apply
  if size > resource.max_page_size
    raise Graphiti::Errors::UnsupportedPageSize
      .new(size, resource.max_page_size)
  elsif requested? && @opts[:sideload_parent_length].to_i > 1
    raise Graphiti::Errors::UnsupportedPagination
  else
    super
  end
end

#apply? ⇒ Boolean

We want to apply this logic unless we’ve explicitly received the default: false option. In that case, only apply if pagination was explicitly specified in the request.

Returns:

  • (Boolean) —

    should we apply this logic?



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# File 'lib/graphiti/scoping/paginate.rb', line 21

def apply?
  if @opts[:default_paginate] == false
    requested?
  else
    true
  end
end

#apply_custom_scope ⇒ Object

Apply the custom pagination proc



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# File 'lib/graphiti/scoping/paginate.rb', line 46

def apply_custom_scope
  resource.instance_exec \
    @scope,
    number,
    size,
    resource.context,
    offset,
    &custom_scope
end

#apply_standard_scope ⇒ Object

Apply default pagination proc via the Resource adapter



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# File 'lib/graphiti/scoping/paginate.rb', line 35

def apply_standard_scope
  arity = resource.adapter.method(:paginate)

  if arity == 4 # backwards-compat
    resource.adapter.paginate(@scope, number, size)
  else
    resource.adapter.paginate(@scope, number, size, offset)
  end
end

#custom_scope ⇒ Proc, Nil

Returns the custom pagination proc.

Returns:

  • (Proc, Nil) —

    the custom pagination proc



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# File 'lib/graphiti/scoping/paginate.rb', line 30

def custom_scope
  resource.pagination
end