Class: GraphQL::StaticValidation::Validator

Inherits:
Object
  • Object
show all
Defined in:
lib/graphql/static_validation/validator.rb

Overview

Initialized with a GraphQL::Schema, then it can validate Language::Nodes::Documentss based on that schema.

By default, it's used by Query

Examples:

Validate a query

validator = GraphQL::StaticValidation::Validator.new(schema: MySchema)
query = GraphQL::Query.new(MySchema, query_string)
errors = validator.validate(query)[:errors]

Instance Method Summary collapse

Constructor Details

#initialize(schema:, rules: GraphQL::StaticValidation::ALL_RULES) ⇒ Validator

Returns a new instance of Validator.

Parameters:

  • schema (GraphQL::Schema)
  • rules (Array<#validate(context)>) (defaults to: GraphQL::StaticValidation::ALL_RULES)

    a list of rules to use when validating


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# File 'lib/graphql/static_validation/validator.rb', line 16

def initialize(schema:, rules: GraphQL::StaticValidation::ALL_RULES)
  @schema = schema
  @rules = rules
end

Instance Method Details

#validate(query, validate: true) ⇒ Array<Hash>

Validate query against the schema. Returns an array of message hashes.

Parameters:

Returns:

  • (Array<Hash>)

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# File 'lib/graphql/static_validation/validator.rb', line 24

def validate(query, validate: true)
  query.trace("validate", { validate: validate, query: query }) do
    can_skip_rewrite = query.context.interpreter? && query.schema.using_ast_analysis? && query.schema.is_a?(Class)
    errors = if validate == false && can_skip_rewrite
      []
    else
      rules_to_use = validate ? @rules : []
      visitor_class = BaseVisitor.including_rules(rules_to_use, rewrite: !can_skip_rewrite)

      context = GraphQL::StaticValidation::ValidationContext.new(query, visitor_class)

      # Attach legacy-style rules
      rules_to_use.each do |rule_class_or_module|
        if rule_class_or_module.method_defined?(:validate)
          rule_class_or_module.new.validate(context)
        end
      end

      context.visitor.visit
      context.errors
    end


    irep = if errors.empty? && context
      # Only return this if there are no errors and validation was actually run
      context.visitor.rewrite_document
    else
      nil
    end

    {
      errors: errors,
      irep: irep,
    }
  end
end