Class: Datacaster::HashMapper
- Inherits:
-
Base
- Object
- Base
- Datacaster::HashMapper
show all
- Defined in:
- lib/datacaster/hash_mapper.rb
Instance Method Summary
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Methods included from Mixin
#&, #*, #call, #call_with_runtime, #cast_errors, #i18n_key, #i18n_map_keys, #i18n_scope, #i18n_vars, #json_schema, #json_schema_attributes, #then, #with_context, #with_object_context, #with_runtime, #|
Constructor Details
#initialize(fields) ⇒ HashMapper
Returns a new instance of HashMapper.
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# File 'lib/datacaster/hash_mapper.rb', line 3
def initialize(fields)
keys = fields.keys.flatten
if keys.length != keys.uniq.length
intersection = keys.select { |k| keys.count(k) > 1 }.uniq.sort
raise ArgumentError.new("When using transform_to_hash([:a, :b, :c] => validator), " \
"each key should not be mentioned more than once on the left-hand-side. Instead, got these " \
"keys mentioned twice or more: #{intersection.inspect}."
)
end
@fields = fields
end
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Instance Method Details
#cast(object, runtime:) ⇒ Object
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# File 'lib/datacaster/hash_mapper.rb', line 16
def cast(object, runtime:)
errors = {}
result = {}
@fields.each do |key, validator|
new_value = runtime.ignore_checks! { validator.with_runtime(runtime).(object) }
if key.is_a?(Array)
unwrapped = new_value.valid? ? new_value.value : new_value.raw_errors
if key.length != unwrapped.length
raise TypeError, "When using transform_to_hash([:a, :b, :c] => validator), validator should return Array "\
"with number of elements equal to the number of elements in left-hand-side array.\n" \
"Got the following (values or errors) instead: #{key.inspect} => #{unwrapped.inspect}."
end
end
if new_value.valid?
if key.is_a?(Array)
key.zip(new_value.value) do |new_key, new_key_value|
result[new_key] = new_key_value
runtime.checked_key!(new_key)
end
else
result[key] = new_value.value
runtime.checked_key!(key)
end
else
if key.is_a?(Array)
errors = Utils.merge_errors(errors, key.zip(new_value.raw_errors).to_h)
else
errors = Utils.merge_errors(errors, {key => new_value.raw_errors})
end
end
end
runtime.will_check!
result.keys.each { |key| runtime.checked_key!(key) }
errors.delete_if { |_, v| v.empty? }
if errors.empty?
result_hash =
if object.is_a?(Hash)
object.merge(result)
else
result
end
result_hash.keys.each { |k| result_hash.delete(k) if result_hash[k] == Datacaster.absent }
Datacaster.ValidResult(result_hash)
else
Datacaster.ErrorResult(errors)
end
end
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#inspect ⇒ Object
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# File 'lib/datacaster/hash_mapper.rb', line 97
def inspect
field_descriptions =
@fields.map do |k, v|
"#{k.inspect} => #{v.inspect}"
end
"#<Datacaster::HashMapper {#{field_descriptions.join(', ')}}>"
end
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#to_json_schema ⇒ Object
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# File 'lib/datacaster/hash_mapper.rb', line 75
def to_json_schema
result = @fields.values.reduce(JsonSchemaResult.new) do |result, caster|
result.apply(caster.to_json_schema)
end
result.without_focus
end
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#to_json_schema_attributes ⇒ Object
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# File 'lib/datacaster/hash_mapper.rb', line 83
def to_json_schema_attributes
super.merge(
remaped: @fields.flat_map do |key, caster|
picked = caster.to_json_schema_attributes[:picked]
if picked.any?
picked.map { |picked| { picked.to_s => key.to_s } }
else
{ nil => key.to_s }
end
end.reduce(&:merge)
)
end
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