Class: Graphiti::Scoping::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/graphiti/scoping/base.rb

Overview

The interface for scoping logic (filter, paginate, etc).

This class defines some common behavior, such as falling back on a default if not part of the user request.

See Also:

Direct Known Subclasses

DefaultFilter, ExtraAttributes, Filter, Paginate, Sort

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(resource, query_hash, scope, opts = {}) ⇒ Base

Returns a new instance of Base.

Parameters:

  • resource (Resource) —

    the Resource instance

  • query_hash (Hash) —

    the Query#to_hash node relevant to the current resource

  • scope —

    the base scope object to chain/modify

  • opts (Hash) (defaults to: {}) —

    configuration options used by subclasses



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# File 'lib/graphiti/scoping/base.rb', line 26

def initialize(resource, query_hash, scope, opts = {})
  @query_hash = query_hash
  @resource = resource
  @scope = scope
  @opts = opts
end

Instance Attribute Details

#query_hash ⇒ Hash (readonly)

the Query#hash node relevant to the current resource

Returns:

  • (Hash) —

    the current value of query_hash



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# File 'lib/graphiti/scoping/base.rb', line 19

def query_hash
  @query_hash
end

#resource ⇒ Resource (readonly)

The corresponding Resource instance

Returns:

  • (Resource) —

    the current value of resource



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# File 'lib/graphiti/scoping/base.rb', line 19

def resource
  @resource
end

Instance Method Details

#apply ⇒ Object

Apply this scoping criteria. This is where we would chain on pagination, sorting, etc.

If #apply? returns false, does nothing. Otherwise will apply the default logic:

# no block, run default logic via adapter
allow_filter :name

Or the customized proc:

allow_filter :name do |scope, value|
  scope.where("upper(name) = ?", value.upcase)
end

Returns:

  • the scope object

See Also:



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# File 'lib/graphiti/scoping/base.rb', line 50

def apply
  if apply?
    apply_standard_or_override
  else
    @scope
  end
end

#apply? ⇒ Boolean

Should we process this scope logic?

Useful for when we want to explicitly opt-out on certain requests, or avoid a default in certain contexts.

Returns:

  • (Boolean) —

    if we should apply this scope logic



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# File 'lib/graphiti/scoping/base.rb', line 64

def apply?
  true
end

#apply_custom_scope ⇒ Object

Defines how to call/apply the custom scoping logic provided by the user.



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# File 'lib/graphiti/scoping/base.rb', line 75

def apply_custom_scope
  raise "override in subclass"
end

#apply_standard_scope ⇒ Object

Defines how to call/apply the default scoping logic



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# File 'lib/graphiti/scoping/base.rb', line 69

def apply_standard_scope
  raise "override in subclass"
end