Class: Attributor::Hash
- Inherits:
-
Object
- Object
- Attributor::Hash
- Defined in:
- lib/attributor/types/hash.rb
Direct Known Subclasses
Constant Summary collapse
- MAX_EXAMPLE_DEPTH =
10
- CIRCULAR_REFERENCE_MARKER =
'...'.freeze
Class Attribute Summary collapse
-
.extra_keys ⇒ Object
Returns the value of attribute extra_keys.
-
.insensitive_map ⇒ Object
readonly
Returns the value of attribute insensitive_map.
-
.key_attribute ⇒ Object
readonly
Returns the value of attribute key_attribute.
-
.key_type ⇒ Object
Returns the value of attribute key_type.
-
.options ⇒ Object
readonly
Returns the value of attribute options.
-
.requirements ⇒ Object
readonly
Returns the value of attribute requirements.
-
.value_attribute ⇒ Object
readonly
Returns the value of attribute value_attribute.
-
.value_type ⇒ Object
Returns the value of attribute value_type.
Instance Attribute Summary collapse
-
#contents ⇒ Object
readonly
TODO: Think about the format of the subcontexts to use: let’s use .at(key.to_s).
-
#dumping ⇒ Object
readonly
Returns the value of attribute dumping.
-
#validating ⇒ Object
readonly
Returns the value of attribute validating.
Class Method Summary collapse
- .add_requirement(req) ⇒ Object
- .attributes(**options, &key_spec) ⇒ Object
- .check_option!(name, _definition) ⇒ Object
- .construct(constructor_block, **options) ⇒ Object
- .constructable? ⇒ Boolean
- .definition ⇒ Object
- .describe(shallow = false, example: nil) ⇒ Object
- .dsl_class ⇒ Object
- .dump(value, **opts) ⇒ Object
- .example(context = nil, **values) ⇒ Object
- .example_contents(context, parent, **values) ⇒ Object
- .family ⇒ Object
- .from_hash(object, context, recurse: false) ⇒ Object
- .generate_subcontext(context, key_name) ⇒ Object
- .inherited(klass) ⇒ Object
- .keys(**options, &key_spec) ⇒ Object
- .load(value, context = Attributor::DEFAULT_ROOT_CONTEXT, recurse: false, **_options) ⇒ Object
- .load_generic(value, context) ⇒ Object
- .native_type ⇒ Object
- .of(key: @key_type, value: @value_type) ⇒ Object
- .parse(value, context) ⇒ Object
- .valid_type?(type) ⇒ Boolean
- .validate(object, context = Attributor::DEFAULT_ROOT_CONTEXT, _attribute) ⇒ Object
Instance Method Summary collapse
- #==(other) ⇒ Object
- #[](k) ⇒ Object
- #[]=(k, v) ⇒ Object
- #_get_attr(k) ⇒ Object
- #delete(key) ⇒ Object
- #dump(**opts) ⇒ Object
- #each(&block) ⇒ Object (also: #each_pair)
- #empty? ⇒ Boolean
- #generate_subcontext(context, key_name) ⇒ Object
- #get(key, context: generate_subcontext(Attributor::DEFAULT_ROOT_CONTEXT, key)) ⇒ Object
- #get_generic(key, context) ⇒ Object
-
#initialize(contents = {}) ⇒ Hash
constructor
A new instance of Hash.
- #key?(k) ⇒ Boolean (also: #has_key?)
- #key_attribute ⇒ Object
- #key_type ⇒ Object
- #keys ⇒ Object
- #merge(h) ⇒ Object
- #set(key, value, context: generate_subcontext(Attributor::DEFAULT_ROOT_CONTEXT, key), recurse: false) ⇒ Object
- #size ⇒ Object
- #validate(context = Attributor::DEFAULT_ROOT_CONTEXT) ⇒ Object
- #validate_generic(context) ⇒ Object
- #validate_keys(context) ⇒ Object
- #value_attribute ⇒ Object
- #value_type ⇒ Object
- #values ⇒ Object
Methods included from Container
Constructor Details
#initialize(contents = {}) ⇒ Hash
Returns a new instance of Hash.
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# File 'lib/attributor/types/hash.rb', line 523 def initialize(contents = {}) @validating = false @dumping = false @contents = contents end |
Class Attribute Details
.extra_keys ⇒ Object
Returns the value of attribute extra_keys.
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# File 'lib/attributor/types/hash.rb', line 31 def extra_keys @extra_keys end |
.insensitive_map ⇒ Object (readonly)
Returns the value of attribute insensitive_map.
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# File 'lib/attributor/types/hash.rb', line 30 def insensitive_map @insensitive_map end |
.key_attribute ⇒ Object (readonly)
Returns the value of attribute key_attribute.
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# File 'lib/attributor/types/hash.rb', line 29 def key_attribute @key_attribute end |
.key_type ⇒ Object
Returns the value of attribute key_type.
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# File 'lib/attributor/types/hash.rb', line 27 def key_type @key_type end |
.options ⇒ Object (readonly)
Returns the value of attribute options.
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# File 'lib/attributor/types/hash.rb', line 27 def @options end |
.requirements ⇒ Object (readonly)
Returns the value of attribute requirements.
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# File 'lib/attributor/types/hash.rb', line 32 def requirements @requirements end |
.value_attribute ⇒ Object (readonly)
Returns the value of attribute value_attribute.
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# File 'lib/attributor/types/hash.rb', line 28 def value_attribute @value_attribute end |
.value_type ⇒ Object
Returns the value of attribute value_type.
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# File 'lib/attributor/types/hash.rb', line 27 def value_type @value_type end |
Instance Attribute Details
#contents ⇒ Object (readonly)
TODO: Think about the format of the subcontexts to use: let’s use .at(key.to_s)
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# File 'lib/attributor/types/hash.rb', line 465 def contents @contents end |
#dumping ⇒ Object (readonly)
Returns the value of attribute dumping.
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# File 'lib/attributor/types/hash.rb', line 521 def dumping @dumping end |
#validating ⇒ Object (readonly)
Returns the value of attribute validating.
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# File 'lib/attributor/types/hash.rb', line 521 def validating @validating end |
Class Method Details
.add_requirement(req) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 152 def self.add_requirement(req) @requirements << req return unless req.attr_names non_existing = req.attr_names - attributes.keys unless non_existing.empty? raise "Invalid attribute name(s) found (#{non_existing.join(', ')}) when defining a requirement of type #{req.type} for #{Attributor.type_name(self)} ." \ "The only existing attributes are #{attributes.keys}" end end |
.attributes(**options, &key_spec) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 82 def self.attributes(**, &key_spec) raise @error if @error keys(, &key_spec) end |
.check_option!(name, _definition) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 246 def self.check_option!(name, _definition) case name when :reference :ok # FIXME: ... actually do something smart when :dsl_compiler :ok when :case_insensitive_load unless key_type <= String raise Attributor::AttributorException, ":case_insensitive_load may not be used with keys of type #{key_type.name}" end :ok when :allow_extra :ok else :unknown end end |
.construct(constructor_block, **options) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 162 def self.construct(constructor_block, **) return self if constructor_block.nil? unless @concrete return of(key: key_type, value: value_type) .construct(constructor_block, **) end if [:case_insensitive_load] && !(key_type <= String) raise Attributor::AttributorException, ":case_insensitive_load may not be used with keys of type #{key_type.name}" end keys(, &constructor_block) self end |
.constructable? ⇒ Boolean
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# File 'lib/attributor/types/hash.rb', line 148 def self.constructable? true end |
.definition ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 107 def self.definition opts = { key_type: @key_type, value_type: @value_type }.merge(@options) blocks = @saved_blocks.shift(@saved_blocks.size) compiler = dsl_class.new(self, opts) compiler.parse(*blocks) if opts[:case_insensitive_load] == true @insensitive_map = keys.keys.each_with_object({}) do |k, map| map[k.downcase] = k end end rescue => e @error = InvalidDefinition.new(self, e) raise end |
.describe(shallow = false, example: nil) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 427 def self.describe(shallow = false, example: nil) hash = super(shallow) hash[:key] = { type: key_type.describe(true) } if key_type if keys.any? # Spit keys if it's the root or if it's an anonymous structures if !shallow || name.nil? required_names = [] # FIXME: change to :keys when the praxis doc browser supports displaying those hash[:attributes] = keys.each_with_object({}) do |(sub_name, sub_attribute), sub_attributes| required_names << sub_name if sub_attribute.[:required] == true sub_example = example.get(sub_name) if example sub_attributes[sub_name] = sub_attribute.describe(true, example: sub_example) end hash[:requirements] = requirements.each_with_object([]) do |req, list| described_req = req.describe(shallow) if described_req[:type] == :all # Add the names of the attributes that have the required flag too described_req[:attributes] |= required_names required_names = [] end list << described_req end # Make sure we create an :all requirement, if there wasn't one so we can add the required: true attributes unless required_names.empty? hash[:requirements] << { type: :all, attributes: required_names } end end else hash[:value] = { type: value_type.describe(true) } hash[:example] = example if example end hash end |
.dsl_class ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 127 def self.dsl_class @options[:dsl_compiler] || HashDSLCompiler end |
.dump(value, **opts) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 240 def self.dump(value, **opts) if (loaded = load(value)) loaded.dump(**opts) end end |
.example(context = nil, **values) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 214 def self.example(context = nil, **values) return new if key_type == Object && value_type == Object && keys.empty? context ||= ["#{Hash}-#{rand(10_000_000)}"] context = Array(context) if keys.any? result = new result.extend(ExampleMixin) result.lazy_attributes = example_contents(context, result, values) else hash = ::Hash.new (rand(3) + 1).times do |i| example_key = key_type.example(context + ["at(#{i})"]) subcontext = context + ["at(#{example_key})"] hash[example_key] = value_type.example(subcontext) end result = new(hash) end result end |
.example_contents(context, parent, **values) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 180 def self.example_contents(context, parent, **values) hash = ::Hash.new example_depth = context.size # Be smart about what attributes to use for the example: i.e. have into account complex requirements # that might have been defined in the hash like at_most(1).of ..., exactly(2).of ...etc. # But play it safe and default to the previous behavior in case there is any error processing them # ( that is until the SmartAttributeSelector class isn't fully tested and ready for prime time) begin stack = SmartAttributeSelector.new( requirements.map(&:describe), keys.keys , values) selected = stack.process rescue => e selected = keys.keys end keys.select{|n,attr| selected.include? n}.each do |sub_attribute_name, sub_attribute| if sub_attribute.attributes # TODO: add option to raise an exception in this case? next if example_depth > MAX_EXAMPLE_DEPTH end sub_context = generate_subcontext(context, sub_attribute_name) block = proc do value = values.fetch(sub_attribute_name) do sub_attribute.example(sub_context, parent: parent) end sub_attribute.load(value, sub_context) end hash[sub_attribute_name] = block end hash end |
.family ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 56 def self.family 'hash' end |
.from_hash(object, context, recurse: false) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 386 def self.from_hash(object, context, recurse: false) hash = new # if the hash definition includes named extra keys, initialize # its value from the object in case it provides some already. # this is to ensure it exists when we handle any extra keys # that may exist in the object later if extra_keys sub_context = generate_subcontext(context, extra_keys) v = object.fetch(extra_keys, {}) hash.set(extra_keys, v, context: sub_context, recurse: recurse) end object.each do |k, val| next if k == extra_keys sub_context = generate_subcontext(context, k) hash.set(k, val, context: sub_context, recurse: recurse) end # handle default values for missing keys keys.each do |key_name, attribute| next if hash.key?(key_name) sub_context = generate_subcontext(context, key_name) default = attribute.load(nil, sub_context, recurse: recurse) hash[key_name] = default unless default.nil? end hash end |
.generate_subcontext(context, key_name) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 300 def self.generate_subcontext(context, key_name) context + ["key(#{key_name.inspect})"] end |
.inherited(klass) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 64 def self.inherited(klass) k = key_type v = value_type klass.instance_eval do @saved_blocks = [] @options = { allow_extra: false } @keys = {} @key_type = k @value_type = v @key_attribute = Attribute.new(@key_type) @value_attribute = Attribute.new(@value_type) @requirements = [] @error = false end end |
.keys(**options, &key_spec) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 88 def self.keys(**, &key_spec) raise @error if @error if block_given? @saved_blocks << key_spec @options.merge!() elsif @saved_blocks.any? definition end @keys end |
.load(value, context = Attributor::DEFAULT_ROOT_CONTEXT, recurse: false, **_options) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 264 def self.load(value, context = Attributor::DEFAULT_ROOT_CONTEXT, recurse: false, **) context = Array(context) return value if value.is_a?(self) return nil if value.nil? && !recurse loaded_value = self.parse(value, context) return from_hash(loaded_value, context, recurse: recurse) if keys.any? load_generic(loaded_value, context) end |
.load_generic(value, context) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 292 def self.load_generic(value, context) return new(value) if key_type == Object && value_type == Object value.each_with_object(new) do |(k, v), obj| obj[key_type.load(k, context)] = value_type.load(v, context) end end |
.native_type ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 131 def self.native_type self end |
.of(key: @key_type, value: @value_type) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 140 def self.of(key: @key_type, value: @value_type) ::Class.new(self) do self.key_type = key self.value_type = value @keys = {} end end |
.parse(value, context) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 276 def self.parse(value, context) if value.nil? {} elsif value.is_a?(Attributor::Hash) value.contents elsif value.is_a?(::Hash) value elsif value.is_a?(::String) decode_json(value, context) elsif value.respond_to?(:to_hash) value.to_hash else raise Attributor::IncompatibleTypeError, context: context, value_type: value.class, type: self end end |
.valid_type?(type) ⇒ Boolean
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# File 'lib/attributor/types/hash.rb', line 135 def self.valid_type?(type) type.is_a?(self) || type.is_a?(::Hash) end |
.validate(object, context = Attributor::DEFAULT_ROOT_CONTEXT, _attribute) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 417 def self.validate(object, context = Attributor::DEFAULT_ROOT_CONTEXT, _attribute) context = [context] if context.is_a? ::String unless object.is_a?(self) raise ArgumentError, "#{name} can not validate object of type #{object.class.name} for #{Attributor.humanize_context(context)}." end object.validate(context) end |
Instance Method Details
#==(other) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 546 def ==(other) contents == other || (other.respond_to?(:contents) ? contents == other.contents : false) end |
#[](k) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 467 def [](k) @contents[k] end |
#[]=(k, v) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 475 def []=(k, v) @contents[k] = v end |
#_get_attr(k) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 471 def _get_attr(k) self[k] end |
#delete(key) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 517 def delete(key) @contents.delete(key) end |
#dump(**opts) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 605 def dump(**opts) return CIRCULAR_REFERENCE_MARKER if @dumping @dumping = true contents.each_with_object({}) do |(k, v), hash| k = key_attribute.dump(k, opts) v = if (attribute_for_value = self.class.keys[k]) attribute_for_value.dump(v, opts) else value_attribute.dump(v, opts) end hash[k] = v end ensure @dumping = false end |
#each(&block) ⇒ Object Also known as: each_pair
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# File 'lib/attributor/types/hash.rb', line 479 def each(&block) @contents.each(&block) end |
#empty? ⇒ Boolean
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# File 'lib/attributor/types/hash.rb', line 497 def empty? @contents.empty? end |
#generate_subcontext(context, key_name) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 304 def generate_subcontext(context, key_name) self.class.generate_subcontext(context, key_name) end |
#get(key, context: generate_subcontext(Attributor::DEFAULT_ROOT_CONTEXT, key)) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 308 def get(key, context: generate_subcontext(Attributor::DEFAULT_ROOT_CONTEXT, key)) key = self.class.key_attribute.load(key, context) return self.get_generic(key, context) if self.class.keys.empty? value = @contents[key] # FIXME: getting an unset value here should not force it in the hash if (attribute = self.class.keys[key]) loaded_value = attribute.load(value, context) return nil if loaded_value.nil? return self[key] = loaded_value end if self.class.[:case_insensitive_load] key = self.class.insensitive_map[key.downcase] return get(key, context: context) end if self.class.[:allow_extra] return @contents[key] = self.class.value_attribute.load(value, context) if self.class.extra_keys.nil? extra_keys_key = self.class.extra_keys if @contents.key? extra_keys_key return @contents[extra_keys_key].get(key, context: context) end end raise LoadError, "Unknown key received: #{key.inspect} for #{Attributor.humanize_context(context)}" end |
#get_generic(key, context) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 339 def get_generic(key, context) if @contents.key? key value = @contents[key] loaded_value = value_attribute.load(value, context) return self[key] = loaded_value elsif self.class.[:case_insensitive_load] key = key.downcase @contents.each do |k, _v| return get(key, context: context) if key == k.downcase end end nil end |
#key?(k) ⇒ Boolean Also known as: has_key?
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# File 'lib/attributor/types/hash.rb', line 501 def key?(k) @contents.key?(k) end |
#key_attribute ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 538 def key_attribute self.class.key_attribute end |
#key_type ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 530 def key_type self.class.key_type end |
#keys ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 489 def keys @contents.keys end |
#merge(h) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 506 def merge(h) case h when self.class self.class.new(contents.merge(h.contents)) when Attributor::Hash raise ArgumentError, 'cannot merge Attributor::Hash instances of different types' unless h.is_a?(self.class) else raise TypeError, "no implicit conversion of #{h.class} into Attributor::Hash" end end |
#set(key, value, context: generate_subcontext(Attributor::DEFAULT_ROOT_CONTEXT, key), recurse: false) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 353 def set(key, value, context: generate_subcontext(Attributor::DEFAULT_ROOT_CONTEXT, key), recurse: false) key = self.class.key_attribute.load(key, context) if self.class.keys.empty? return self[key] = self.class.value_attribute.load(value, context) end if (attribute = self.class.keys[key]) return self[key] = attribute.load(value, context, recurse: recurse) end if self.class.[:case_insensitive_load] key = self.class.insensitive_map[key.downcase] return set(key, value, context: context) end if self.class.[:allow_extra] return self[key] = self.class.value_attribute.load(value, context) if self.class.extra_keys.nil? extra_keys_key = self.class.extra_keys unless @contents.key? extra_keys_key extra_keys_value = self.class.keys[extra_keys_key].load({}) @contents[extra_keys_key] = extra_keys_value end return self[extra_keys_key].set(key, value, context: context) end raise LoadError, "Unknown key received: #{key.inspect} while loading #{Attributor.humanize_context(context)}" end |
#size ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 485 def size @contents.size end |
#validate(context = Attributor::DEFAULT_ROOT_CONTEXT) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 550 def validate(context = Attributor::DEFAULT_ROOT_CONTEXT) context = [context] if context.is_a? ::String if self.class.keys.any? self.validate_keys(context) else self.validate_generic(context) end end |
#validate_generic(context) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 590 def validate_generic(context) @contents.each_with_object([]) do |(key, value), errors| # FIXME: the sub contexts and error messages don't really make sense here unless key_type == Attributor::Object sub_context = context + ["key(#{key.inspect})"] errors.concat key_attribute.validate(key, sub_context) end unless value_type == Attributor::Object sub_context = context + ["value(#{value.inspect})"] errors.concat value_attribute.validate(value, sub_context) end end end |
#validate_keys(context) ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 560 def validate_keys(context) extra_keys = @contents.keys - self.class.keys.keys if extra_keys.any? && !self.class.[:allow_extra] return extra_keys.collect do |k| "#{Attributor.humanize_context(context)} can not have key: #{k.inspect}" end end errors = [] keys_with_values = [] self.class.keys.each do |key, attribute| sub_context = self.class.generate_subcontext(context, key) value = @contents[key] keys_with_values << key unless value.nil? if value.respond_to?(:validating) # really, it's a thing with sub-attributes next if value.validating end errors.concat attribute.validate(value, sub_context) end self.class.requirements.each do |requirement| validation_errors = requirement.validate(keys_with_values, context) errors.concat(validation_errors) unless validation_errors.empty? end errors end |
#value_attribute ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 542 def value_attribute self.class.value_attribute end |
#value_type ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 534 def value_type self.class.value_type end |
#values ⇒ Object
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# File 'lib/attributor/types/hash.rb', line 493 def values @contents.values end |