Class: GraphQL::StaticValidation::ValidationContext

Inherits:
Object
  • Object
show all
Extended by:
Delegate
Defined in:
lib/graphql/static_validation/validation_context.rb

Overview

The validation context gets passed to each validator.

It exposes a Language::Visitor where validators may add hooks. (Language::Visitor#visit is called in GraphQL::StaticValidation::Validator#validate)

It provides access to the schema & fragments which validators may read from.

It holds a list of errors which each validator may add to.

It also provides limited access to the TypeStack instance, which tracks state as you climb in and out of different fields.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Delegate

def_delegators

Constructor Details

#initialize(query) ⇒ ValidationContext

Returns a new instance of ValidationContext.



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# File 'lib/graphql/static_validation/validation_context.rb', line 23

def initialize(query)
  @query = query
  @literal_validator = LiteralValidator.new(context: query.context)
  @errors = []
  @visitor = GraphQL::Language::Visitor.new(document)
  @type_stack = GraphQL::StaticValidation::TypeStack.new(schema, visitor)
  definition_dependencies = DefinitionDependencies.mount(self)
  @on_dependency_resolve_handlers = []
  @each_irep_node_handlers = []
  visitor[GraphQL::Language::Nodes::Document].leave << ->(_n, _p) {
    @dependencies = definition_dependencies.dependency_map { |defn, spreads, frag|
      @on_dependency_resolve_handlers.each { |h| h.call(defn, spreads, frag) }
    }
  }
end

Instance Attribute Details

#dependencies ⇒ Object (readonly)

Returns the value of attribute dependencies.



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# File 'lib/graphql/static_validation/validation_context.rb', line 17

def dependencies
  @dependencies
end

#document ⇒ Object (readonly)

Returns the value of attribute document.



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# File 'lib/graphql/static_validation/validation_context.rb', line 17

def document
  @document
end

#each_irep_node_handlers ⇒ Object (readonly)

Returns the value of attribute each_irep_node_handlers.



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# File 'lib/graphql/static_validation/validation_context.rb', line 17

def each_irep_node_handlers
  @each_irep_node_handlers
end

#errors ⇒ Object (readonly)

Returns the value of attribute errors.



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# File 'lib/graphql/static_validation/validation_context.rb', line 17

def errors
  @errors
end

#query ⇒ Object (readonly)

Returns the value of attribute query.



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# File 'lib/graphql/static_validation/validation_context.rb', line 17

def query
  @query
end

#schema ⇒ Object (readonly)

Returns the value of attribute schema.



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# File 'lib/graphql/static_validation/validation_context.rb', line 17

def schema
  @schema
end

#visitor ⇒ Object (readonly)

Returns the value of attribute visitor.



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# File 'lib/graphql/static_validation/validation_context.rb', line 17

def visitor
  @visitor
end

#warden ⇒ Object (readonly)

Returns the value of attribute warden.



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# File 'lib/graphql/static_validation/validation_context.rb', line 17

def warden
  @warden
end

Instance Method Details

#argument_definition ⇒ GraphQL::Argument?

Returns The most-recently-entered GraphQL::Argument, if currently inside one.

Returns:

  • (GraphQL::Argument, nil) —

    The most-recently-entered GraphQL::Argument, if currently inside one



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# File 'lib/graphql/static_validation/validation_context.rb', line 77

def argument_definition
  # Don't get the _last_ one because that's the current one.
  # Get the second-to-last one, which is the parent of the current one.
  @type_stack.argument_definitions[-2]
end

#directive_definition ⇒ GraphQL::Directive?

Returns The most-recently-entered GraphQL::Directive, if currently inside one.

Returns:

  • (GraphQL::Directive, nil) —

    The most-recently-entered GraphQL::Directive, if currently inside one



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# File 'lib/graphql/static_validation/validation_context.rb', line 72

def directive_definition
  @type_stack.directive_definitions.last
end

#each_irep_node(&handler) ⇒ Object 



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# File 'lib/graphql/static_validation/validation_context.rb', line 47

def each_irep_node(&handler)
  @each_irep_node_handlers << handler
end

#field_definition ⇒ GraphQL::Field?

Returns The most-recently-entered GraphQL::Field, if currently inside one.

Returns:

  • (GraphQL::Field, nil) —

    The most-recently-entered GraphQL::Field, if currently inside one



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# File 'lib/graphql/static_validation/validation_context.rb', line 62

def field_definition
  @type_stack.field_definitions.last
end

#object_types ⇒ Object 



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# File 'lib/graphql/static_validation/validation_context.rb', line 43

def object_types
  @type_stack.object_types
end

#on_dependency_resolve(&handler) ⇒ Object 



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# File 'lib/graphql/static_validation/validation_context.rb', line 39

def on_dependency_resolve(&handler)
  @on_dependency_resolve_handlers << handler
end

#parent_type_definition ⇒ GraphQL::BaseType

Returns The type which the current type came from.

Returns:



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# File 'lib/graphql/static_validation/validation_context.rb', line 57

def parent_type_definition
  object_types[-2]
end

#path ⇒ Array<String>

Returns Field names to get to the current field.

Returns:

  • (Array<String>) —

    Field names to get to the current field



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# File 'lib/graphql/static_validation/validation_context.rb', line 67

def path
  @type_stack.path.dup
end

#type_definition ⇒ GraphQL::BaseType

Returns The current object type.

Returns:



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# File 'lib/graphql/static_validation/validation_context.rb', line 52

def type_definition
  object_types.last
end

#valid_literal?(ast_value, type) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/static_validation/validation_context.rb', line 83

def valid_literal?(ast_value, type)
  @literal_validator.validate(ast_value, type)
end