Class: Grape::Validations::ParamsScope

Inherits:
Object
  • Object
show all
Includes:
DSL::Parameters
Defined in:
lib/grape/validations/params_scope.rb,
lib/grape/validations/attributes_doc.rb

Defined Under Namespace

Classes: Attr, AttributesDoc

Constant Summary collapse

RESERVED_DOCUMENTATION_KEYWORDS =

There are a number of documentation options on entities that don't have corresponding validators. Since there is nowhere that enumerates them all, we maintain a list of them here and skip looking up validators for them.

%i[as required param_type is_array format example].freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from DSL::Parameters

#all_or_none_of, #at_least_one_of, #build_with, #declared_param?, #exactly_one_of, #given, #map_params, #mutually_exclusive, #optional, #params, #requires, #use, #with

Constructor Details

#initialize(opts) { ... } ⇒ ParamsScope

Open up a new ParamsScope, allowing parameter definitions per Grape::DSL::Params.

Parameters:

  • opts (Hash) —

    options for this scope

Options Hash (opts):

  • :element (Symbol) —

    the element that contains this scope; for this to be relevant, @parent must be set

  • :element_renamed (Symbol, nil) —

    whenever this scope should be renamed and to what, given +nil+ no renaming is done

  • :parent (ParamsScope) —

    the scope containing this scope

  • :api (API) —

    the API endpoint to modify

  • :optional (Boolean) —

    whether or not this scope needs to have any parameters set or not

  • :type (Class) —

    a type meant to govern this scope (deprecated)

  • :type (Hash) —

    group options for this scope

  • :dependent_on (Symbol) —

    if present, this scope should only validate if this param is present in the parent scope

Yields:

  • the instance context, open for parameter definitions



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# File 'lib/grape/validations/params_scope.rb', line 63

def initialize(opts, &block)
  @element          = opts[:element]
  @element_renamed  = opts[:element_renamed]
  @parent           = opts[:parent]
  @api              = opts[:api]
  @optional         = opts[:optional] || false
  @type             = opts[:type]
  @group            = opts[:group]
  @dependent_on     = opts[:dependent_on]
  @declared_params = []
  @index = nil

  instance_eval(&block) if block

  configure_declared_params
end

Instance Attribute Details

#element ⇒ Object

Returns the value of attribute element.



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# File 'lib/grape/validations/params_scope.rb', line 8

def element
  @element
end

#index ⇒ Object

Returns the value of attribute index.



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# File 'lib/grape/validations/params_scope.rb', line 8

def index
  @index
end

#parent ⇒ Object

Returns the value of attribute parent.



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# File 'lib/grape/validations/params_scope.rb', line 8

def parent
  @parent
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/grape/validations/params_scope.rb', line 9

def type
  @type
end

Instance Method Details

#attr_meets_dependency?(params) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/grape/validations/params_scope.rb', line 106

def attr_meets_dependency?(params)
  return true unless @dependent_on

  return false if @parent.present? && !@parent.attr_meets_dependency?(params)

  meets_hash_dependency?(params)
end

#brackets(val) ⇒ Object 



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# File 'lib/grape/validations/params_scope.rb', line 146

def brackets(val)
  "[#{val}]" if val
end

#configuration ⇒ Object 



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# File 'lib/grape/validations/params_scope.rb', line 80

def configuration
  @api.configuration.respond_to?(:evaluate) ? @api.configuration.evaluate : @api.configuration
end

#full_name(name, index: nil) ⇒ String

Returns the proper attribute name, with nesting considered.

Returns:

  • (String) —

    the proper attribute name, with nesting considered.



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# File 'lib/grape/validations/params_scope.rb', line 132

def full_name(name, index: nil)
  if nested?
    # Find our containing element's name, and append ours.
    "#{@parent.full_name(@element)}#{brackets(@index || index)}#{brackets(name)}"
  elsif lateral?
    # Find the name of the element as if it was at the same nesting level
    # as our parent. We need to forward our index upward to achieve this.
    @parent.full_name(name, index: @index)
  else
    # We must be the root scope, so no prefix needed.
    name.to_s
  end
end

#lateral? ⇒ Boolean

A lateral scope is subordinate to its parent, but its keys are at the same level as its parent and thus is not contained within an element.

Returns:

  • (Boolean) —

    whether or not this scope is lateral



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# File 'lib/grape/validations/params_scope.rb', line 164

def lateral?
  @parent && !@element
end

#meets_dependency?(params, request_params) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/grape/validations/params_scope.rb', line 96

def meets_dependency?(params, request_params)
  return true unless @dependent_on

  return false if @parent.present? && !@parent.meets_dependency?(@parent.params(request_params), request_params)

  return params.any? { |param| meets_dependency?(param, request_params) } if params.is_a?(Array)

  meets_hash_dependency?(params)
end

#meets_hash_dependency?(params) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/grape/validations/params_scope.rb', line 114

def meets_hash_dependency?(params)
  # params might be anything what looks like a hash, so it must implement a `key?` method
  return false unless params.respond_to?(:key?)

  @dependent_on.each do |dependency|
    if dependency.is_a?(Hash)
      dependency_key = dependency.keys[0]
      proc = dependency.values[0]
      return false unless proc.call(params.try(:[], dependency_key))
    elsif params.respond_to?(:key?) && params.try(:[], dependency).blank?
      return false
    end
  end

  true
end

#nested? ⇒ Boolean

A nested scope is contained in one of its parent's elements.

Returns:

  • (Boolean) —

    whether or not this scope is nested



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# File 'lib/grape/validations/params_scope.rb', line 157

def nested?
  @parent && @element
end

#required? ⇒ Boolean

Returns whether or not this scope needs to be present, or can be blank.

Returns:

  • (Boolean) —

    whether or not this scope needs to be present, or can be blank



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# File 'lib/grape/validations/params_scope.rb', line 170

def required?
  !@optional
end

#root? ⇒ Boolean

Returns whether or not this scope is the root-level scope.

Returns:

  • (Boolean) —

    whether or not this scope is the root-level scope



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# File 'lib/grape/validations/params_scope.rb', line 151

def root?
  !@parent
end

#should_validate?(parameters) ⇒ Boolean

Returns whether or not this entire scope needs to be validated.

Returns:

  • (Boolean) —

    whether or not this entire scope needs to be validated



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# File 'lib/grape/validations/params_scope.rb', line 86

def should_validate?(parameters)
  scoped_params = params(parameters)

  return false if @optional && (scoped_params.blank? || all_element_blank?(scoped_params))
  return false unless meets_dependency?(scoped_params, parameters)
  return true if parent.nil?

  parent.should_validate?(parameters)
end