Class: Parametric::Field
- Inherits:
-
Object
- Object
- Parametric::Field
- Includes:
- FieldDSL
- Defined in:
- lib/parametric/field.rb
Defined Under Namespace
Classes: Result
Instance Attribute Summary collapse
-
#key ⇒ Object
readonly
Returns the value of attribute key.
-
#meta_data ⇒ Object
readonly
Returns the value of attribute meta_data.
Instance Method Summary collapse
- #default(value) ⇒ Object
-
#initialize(key, registry = Parametric.registry) ⇒ Field
constructor
A new instance of Field.
- #meta(hash = nil) ⇒ Object
- #policy(key, *args) ⇒ Object (also: #type)
- #resolve(payload, context) ⇒ Object
- #schema(sc = nil, &block) ⇒ Object
- #visit(meta_key = nil, &visitor) ⇒ Object
Methods included from FieldDSL
#declared, #options, #present, #required
Constructor Details
#initialize(key, registry = Parametric.registry) ⇒ Field
Returns a new instance of Field.
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# File 'lib/parametric/field.rb', line 14 def initialize(key, registry = Parametric.registry) @key = key @policies = [] @registry = registry @default_block = nil @meta_data = {} @policies = [] end |
Instance Attribute Details
#key ⇒ Object (readonly)
Returns the value of attribute key.
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# File 'lib/parametric/field.rb', line 11 def key @key end |
#meta_data ⇒ Object (readonly)
Returns the value of attribute meta_data.
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# File 'lib/parametric/field.rb', line 11 def @meta_data end |
Instance Method Details
#default(value) ⇒ Object
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# File 'lib/parametric/field.rb', line 28 def default(value) default: value @default_block = (value.respond_to?(:call) ? value : ->(key, payload, context) { value }) self end |
#meta(hash = nil) ⇒ Object
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# File 'lib/parametric/field.rb', line 23 def (hash = nil) @meta_data = @meta_data.merge(hash) if hash.is_a?(Hash) self end |
#policy(key, *args) ⇒ Object Also known as: type
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# File 'lib/parametric/field.rb', line 34 def policy(key, *args) pol = lookup(key, args) pol. policies << pol self end |
#resolve(payload, context) ⇒ Object
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# File 'lib/parametric/field.rb', line 57 def resolve(payload, context) eligible = payload.key?(key) value = payload[key] # might be nil if !eligible && has_default? eligible = true value = default_block.call(key, payload, context) return Result.new(eligible, value) end policies.each do |policy| if !policy.eligible?(value, key, payload) eligible = false if has_default? eligible = true value = default_block.call(key, payload, context) end break else value = resolve_one(policy, value, context) if !policy.valid?(value, key, payload) eligible = true # eligible, but has errors context.add_error policy. break # only one error at a time end end end Result.new(eligible, value) end |
#schema(sc = nil, &block) ⇒ Object
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# File 'lib/parametric/field.rb', line 42 def schema(sc = nil, &block) sc = (sc ? sc : Schema.new(&block)) schema: sc policy sc.schema end |
#visit(meta_key = nil, &visitor) ⇒ Object
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# File 'lib/parametric/field.rb', line 48 def visit( = nil, &visitor) if sc = [:schema] r = sc.visit(, &visitor) ([:type] == :array) ? [r] : r else ? [] : yield(self) end end |