60 lines
1.5 KiB
Ruby
60 lines
1.5 KiB
Ruby
# frozen_string_literal: true
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#
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# JsonSchemaValidator
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#
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# Custom validator for json schema.
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# Create a json schema within the json_schemas directory
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#
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# class Project < ActiveRecord::Base
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# validates :data, json_schema: { filename: "file" }
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# end
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#
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class JsonSchemaValidator < ActiveModel::EachValidator
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FILENAME_ALLOWED = /\A[a-z0-9_-]*\Z/.freeze
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FilenameError = Class.new(StandardError)
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BASE_DIRECTORY = %w(app validators json_schemas).freeze
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def initialize(options)
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raise ArgumentError, "Expected 'filename' as an argument" unless options[:filename]
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raise FilenameError, "Must be a valid 'filename'" unless options[:filename].match?(FILENAME_ALLOWED)
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@base_directory = options.delete(:base_directory) || BASE_DIRECTORY
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super(options)
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end
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def validate_each(record, attribute, value)
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value = value.to_h.stringify_keys if options[:hash_conversion] == true
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unless valid_schema?(value)
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record.errors.add(attribute, _("must be a valid json schema"))
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end
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end
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private
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attr_reader :base_directory
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def valid_schema?(value)
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validator.valid?(value)
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end
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def validator
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@validator ||= JSONSchemer.schema(Pathname.new(schema_path))
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end
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def schema_path
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@schema_path ||= Rails.root.join(*base_directory, filename_with_extension).to_s
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end
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def filename_with_extension
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"#{options[:filename]}.json"
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end
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def draft_version
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options[:draft] || JSON_VALIDATOR_MAX_DRAFT_VERSION
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end
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end
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JsonSchemaValidator.prepend_mod
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